UIWebView體系結構（三）UIWebDocumentView和WebView

轉自：http://blog.csdn.net/hursing

WebView是UIWebDocumentView最重要的組合對象，先講WebView吧。

WebView的聲明如下：（代碼好長，點此跳過）

@interface WebView : WAKView
{
    WebViewPrivate *_private;
}

+ (void)registerViewClass:(Class)arg1 representationClass:(Class)arg2 forMIMEType:(id)arg3;
+ (void)registerURLSchemeAsLocal:(id)arg1;
+ (void)setMIMETypesShownAsHTML:(id)arg1;
+ (id)MIMETypesShownAsHTML;
+ (BOOL)canShowMIMETypeAsHTML:(id)arg1;
+ (BOOL)canShowMIMEType:(id)arg1;
+ (BOOL)_canShowMIMEType:(id)arg1 allowingPlugins:(BOOL)arg2;
+ (void)initialize;
+ (void)_makeAllWebViewsPerformSelector:(SEL)arg1;
+ (void)_setTileCacheLayerPoolCapacity:(unsigned int)arg1;
+ (void)_setHTTPPipeliningEnabled:(BOOL)arg1;
+ (BOOL)_HTTPPipeliningEnabled;
+ (double)_defaultMinimumTimerInterval;
+ (void)_setLoadResourcesSerially:(BOOL)arg1;
+ (void)_registerURLSchemeAsAllowingDatabaseAccessInPrivateBrowsing:(id)arg1;
+ (void)_registerURLSchemeAsAllowingLocalStorageAccessInPrivateBrowsing:(id)arg1;
+ (void)_registerURLSchemeAsSecure:(id)arg1;
+ (void)_setDomainRelaxationForbidden:(BOOL)arg1 forURLScheme:(id)arg2;
+ (void)_removeAllUserContentFromGroup:(id)arg1;
+ (void)_removeUserStyleSheetsFromGroup:(id)arg1 world:(id)arg2;
+ (void)_removeUserScriptsFromGroup:(id)arg1 world:(id)arg2;
+ (void)_removeUserStyleSheetFromGroup:(id)arg1 world:(id)arg2 url:(id)arg3;
+ (void)_removeUserScriptFromGroup:(id)arg1 world:(id)arg2 url:(id)arg3;
+ (void)_addUserStyleSheetToGroup:(id)arg1 world:(id)arg2 source:(id)arg3 url:(id)arg4 whitelist:(id)arg5 blacklist:(id)arg6 injectedFrames:(int)arg7;
+ (void)_addUserStyleSheetToGroup:(id)arg1 world:(id)arg2 source:(id)arg3 url:(id)arg4 whitelist:(id)arg5 blacklist:(id)arg6;
+ (void)_addUserScriptToGroup:(id)arg1 world:(id)arg2 source:(id)arg3 url:(id)arg4 whitelist:(id)arg5 blacklist:(id)arg6 injectionTime:(int)arg7 injectedFrames:(int)arg8;
+ (void)_addUserScriptToGroup:(id)arg1 world:(id)arg2 source:(id)arg3 url:(id)arg4 whitelist:(id)arg5 blacklist:(id)arg6 injectionTime:(int)arg7;
+ (void)_resetOriginAccessWhitelists;
+ (void)_removeOriginAccessWhitelistEntryWithSourceOrigin:(id)arg1 destinationProtocol:(id)arg2 destinationHost:(id)arg3 allowDestinationSubdomains:(BOOL)arg4;
+ (void)_addOriginAccessWhitelistEntryWithSourceOrigin:(id)arg1 destinationProtocol:(id)arg2 destinationHost:(id)arg3 allowDestinationSubdomains:(BOOL)arg4;
+ (unsigned int)_maximumImageSizeBeforeSubsampling;
+ (void)_setMaximumImageSizeBeforeSubsampling:(unsigned int)arg1;
+ (id)_productivityDocumentMIMETypes;
+ (BOOL)_shouldUseFontSmoothing;
+ (void)_setShouldUseFontSmoothing:(BOOL)arg1;
+ (id)_decodeData:(id)arg1;
+ (BOOL)_canHandleRequest:(id)arg1;
+ (BOOL)_canHandleRequest:(id)arg1 forMainFrame:(BOOL)arg2;
+ (BOOL)_representationExistsForURLScheme:(id)arg1;
+ (id)_generatedMIMETypeForURLScheme:(id)arg1;
+ (void)_registerViewClass:(Class)arg1 representationClass:(Class)arg2 forURLScheme:(id)arg3;
+ (void)_unregisterViewClassAndRepresentationClassForMIMEType:(id)arg1;
+ (BOOL)_isRemoteInspectorEnabled;
+ (void)_disableAutoStartRemoteInspector;
+ (void)_disableRemoteInspector;
+ (void)_enableRemoteInspector;
+ (id)sharedWebInspectorServer;
+ (id)_MIMETypeForFile:(id)arg1;
+ (BOOL)_isUnderMemoryPressure;
+ (BOOL)_allowCookies;
+ (void)_setAllowCookies:(BOOL)arg1;
+ (BOOL)_acceleratedImageDecoding;
+ (void)_setAcceleratedImageDecoding:(BOOL)arg1;
+ (BOOL)canShowFile:(id)arg1;
+ (void)closeAllWebViews;
+ (BOOL)canCloseAllWebViews;
+ (BOOL)_allowsRoundingHacks;
+ (void)_setAllowsRoundingHacks:(BOOL)arg1;
+ (void)_setAlwaysUsesComplexTextCodePath:(BOOL)arg1;
+ (BOOL)_viewClass:(Class *)arg1 andRepresentationClass:(Class *)arg2 forMIMEType:(id)arg3 allowingPlugins:(BOOL)arg4;
+ (void)_unregisterPluginMIMEType:(id)arg1;
+ (void)_registerPluginMIMEType:(id)arg1;
+ (BOOL)isCharacterSmartReplaceExempt:(unsigned short)arg1 isPreviousCharacter:(BOOL)arg2;
+ (void)discardAllCompiledCode;
+ (void)drainLayerPool;
+ (void)purgeInactiveFontData;
+ (void)garbageCollectNow;
+ (void)releaseFastMallocMemory;
+ (void)willEnterBackgroundWithCompletionHandler:(id)arg1;
+ (void)_releaseMemoryNow;
+ (void)registerForMemoryNotifications;
+ (void)_handleMemoryWarning;
+ (void)enableWebThread;
+ (id)_supportedMIMETypes;
+ (void)_reportException:(struct OpaqueJSValue *)arg1 inContext:(struct OpaqueJSContext *)arg2;
+ (id)_standardUserAgentWithApplicationName:(id)arg1;
+ (id)_standardUserAgentWithApplicationName:(id)arg1 osMarketingVersion:(id)arg2;
+ (void)_preflightSpellChecker;
+ (void)_preflightSpellCheckerNow:(id)arg1;
+ (void)_preferencesRemovedNotification:(id)arg1;
+ (void)_cacheModelChangedNotification:(id)arg1;
+ (unsigned int)_maxCacheModelInAnyInstance;
+ (unsigned int)_didSetCacheModel;
+ (unsigned int)_cacheModel;
+ (void)_setCacheModel:(unsigned int)arg1;
+ (BOOL)shouldIncludeInWebKitStatistics;
+ (void)_setPDFViewClass:(Class)arg1;
+ (Class)_getPDFViewClass;
+ (void)_setPDFRepresentationClass:(Class)arg1;
+ (Class)_getPDFRepresentationClass;
- (id)previousValidKeyView;
- (id)currentNodeHighlight;
- (void)setCurrentNodeHighlight:(id)arg1;
- (BOOL)shouldUpdateWhileOffscreen;
- (void)setShouldUpdateWhileOffscreen:(BOOL)arg1;
- (BOOL)drawsBackground;
- (void)setDrawsBackground:(BOOL)arg1;
- (id)mainFrameDocument;
- (id)mainFrameIconURL;
- (id)mainFrameTitle;
- (BOOL)isLoading;
- (id)mainFrameURL;
- (void)setMainFrameURL:(id)arg1;
- (double)estimatedProgress;
- (id)groupName;
- (void)setGroupName:(id)arg1;
- (BOOL)searchFor:(id)arg1 direction:(BOOL)arg2 caseSensitive:(BOOL)arg3 wrap:(BOOL)arg4;
- (void)setNextKeyView:(id)arg1;
- (id)_webcore_effectiveFirstResponder;
- (BOOL)becomeFirstResponder;
- (BOOL)acceptsFirstResponder;
- (id)elementAtPoint:(struct CGPoint)arg1;
- (id)_elementAtWindowPoint:(struct CGPoint)arg1;
- (id)documentViewAtWindowPoint:(struct CGPoint)arg1;
- (id)hostWindow;
- (void)setHostWindow:(id)arg1;
- (id)userAgentForURL:(id)arg1;
- (struct String)_userAgentString;
- (id)windowScriptObject;
- (id)stringByEvaluatingJavaScriptFromString:(id)arg1;
- (id)customTextEncodingName;
- (id)_mainFrameOverrideEncoding;
- (void)setCustomTextEncodingName:(id)arg1;
- (BOOL)supportsTextEncoding;
- (id)mediaStyle;
- (void)setMediaStyle:(id)arg1;
- (id)customUserAgent;
- (void)setCustomUserAgent:(id)arg1;
- (id)applicationNameForUserAgent;
- (void)setApplicationNameForUserAgent:(id)arg1;
- (void)_resetZoom:(id)arg1 isTextOnly:(BOOL)arg2;
- (BOOL)_canResetZoom:(BOOL)arg1;
- (void)_zoomIn:(id)arg1 isTextOnly:(BOOL)arg2;
- (void)_zoomOut:(id)arg1 isTextOnly:(BOOL)arg2;
- (BOOL)_canZoomIn:(BOOL)arg1;
- (BOOL)_canZoomOut:(BOOL)arg1;
- (BOOL)_realZoomMultiplierIsTextOnly;
- (float)_realZoomMultiplier;
- (float)_zoomMultiplier:(BOOL)arg1;
- (void)_setZoomMultiplier:(float)arg1 isTextOnly:(BOOL)arg2;
- (float)textSizeMultiplier;
- (void)setTextSizeMultiplier:(float)arg1;
- (BOOL)goToBackForwardItem:(id)arg1;
- (BOOL)goForward;
- (BOOL)goBack;
- (void)setMaintainsBackForwardList:(BOOL)arg1;
- (id)backForwardList;
- (id)selectedFrame;
- (id)mainFrame;
- (id)frameLoadDelegate;
- (void)setFrameLoadDelegate:(id)arg1;
- (id)_frameLoadDelegateForwarder;
- (id)policyDelegate;
- (void)setPolicyDelegate:(id)arg1;
- (id)downloadDelegate;
- (void)setDownloadDelegate:(id)arg1;
- (id)resourceLoadDelegate;
- (void)setResourceLoadDelegate:(id)arg1;
- (id)_resourceLoadDelegateForwarder;
- (id)UIDelegate;
- (void)setUIDelegate:(id)arg1;
- (id)preferencesIdentifier;
- (void)setPreferencesIdentifier:(id)arg1;
- (id)preferences;
- (void)setPreferences:(id)arg1;
- (void)_updateScreenScaleFromWindow;
- (void)_wakWindowScreenScaleChanged:(id)arg1;
- (void)viewDidMoveToWindow;
- (BOOL)shouldCloseWithWindow;
- (void)setShouldCloseWithWindow:(BOOL)arg1;
- (void)close;
- (void)finalize;
- (void)dealloc;
- (id)initWithFrame:(struct CGRect)arg1 frameName:(id)arg2 groupName:(id)arg3;
- (id)initWithFrame:(struct CGRect)arg1;
- (id)_initWithArguments:(id)arg1;
- (BOOL)_isMIMETypeRegisteredAsPlugin:(id)arg1;
- (id)_pluginForExtension:(id)arg1;
- (id)_videoProxyPluginForMIMEType:(id)arg1;
- (id)_pluginForMIMEType:(id)arg1;
- (BOOL)_canShowMIMEType:(id)arg1;
- (void)_addToAllWebViewsSet;
- (void)_removeFromAllWebViewsSet;
- (void)_setWebGLEnabled:(BOOL)arg1;
- (BOOL)_webGLEnabled;
- (void)_setWantsTelephoneNumberParsing:(BOOL)arg1;
- (BOOL)_wantsTelephoneNumberParsing;
- (void)_documentScaleChanged;
- (id)_fixedPositionContent;
- (void)_setMinimumTimerInterval:(double)arg1;
- (BOOL)searchFor:(id)arg1 direction:(BOOL)arg2 caseSensitive:(BOOL)arg3 wrap:(BOOL)arg4 startInSelection:(BOOL)arg5;
- (unsigned int)countMatchesForText:(id)arg1 caseSensitive:(BOOL)arg2 highlight:(BOOL)arg3 limit:(unsigned int)arg4 markMatches:(BOOL)arg5;
- (unsigned int)markAllMatchesForText:(id)arg1 caseSensitive:(BOOL)arg2 highlight:(BOOL)arg3 limit:(unsigned int)arg4;
- (unsigned int)_pageCount;
- (float)_gapBetweenPages;
- (void)_setGapBetweenPages:(float)arg1;
- (float)_pageLength;
- (void)_setPageLength:(float)arg1;
- (BOOL)_paginationBehavesLikeColumns;
- (void)_setPaginationBehavesLikeColumns:(BOOL)arg1;
- (int)_paginationMode;
- (void)_setPaginationMode:(int)arg1;
- (BOOL)_useFixedLayout;
- (void)_setUseFixedLayout:(BOOL)arg1;
- (float)_viewScaleFactor;
- (void)_scaleWebView:(float)arg1 atOrigin:(struct CGPoint)arg2;
- (void)setCSSAnimationsSuspended:(BOOL)arg1;
- (BOOL)cssAnimationsSuspended;
- (void)_updateActiveState;
- (id)trackedRepaintRects;
- (void)resetTrackedRepaints;
- (BOOL)isTrackingRepaints;
- (void)setTracksRepaints:(BOOL)arg1;
- (BOOL)_includesFlattenedCompositingLayersWhenDrawingToBitmap;
- (void)_setIncludesFlattenedCompositingLayersWhenDrawingToBitmap:(BOOL)arg1;
- (BOOL)_isSoftwareRenderable;
- (void)setValidationMessageTimerMagnification:(int)arg1;
- (int)validationMessageTimerMagnification;
- (void)setInteractiveFormValidationEnabled:(BOOL)arg1;
- (BOOL)interactiveFormValidationEnabled;
- (void)_setBaseCTM:(struct CGAffineTransform)arg1 forContext:(struct CGContext *)arg2;
- (BOOL)_isUsingAcceleratedCompositing;
- (void)_setPostsAcceleratedCompositingNotifications:(BOOL)arg1;
- (BOOL)_postsAcceleratedCompositingNotifications;
- (void)_setJavaScriptURLsAreAllowed:(BOOL)arg1;
- (BOOL)areMemoryCacheDelegateCallsEnabled;
- (void)setMemoryCacheDelegateCallsEnabled:(BOOL)arg1;
- (BOOL)isSelectTrailingWhitespaceEnabled;
- (void)setSelectTrailingWhitespaceEnabled:(BOOL)arg1;
- (void)_clearMainFrameName;
- (void)_setCustomHTMLTokenizerChunkSize:(int)arg1;
- (void)_setCustomHTMLTokenizerTimeDelay:(double)arg1;
- (void)_executeCoreCommandByName:(id)arg1 value:(id)arg2;
- (BOOL)_catchesDelegateExceptions;
- (void)_setCatchesDelegateExceptions:(BOOL)arg1;
- (id)textIteratorForRect:(struct CGRect)arg1;
- (void)_setGlobalHistoryItem:(struct HistoryItem *)arg1;
- (id)_globalHistoryItem;
- (void)setUsesPageCache:(BOOL)arg1;
- (BOOL)usesPageCache;
- (id)_touchEventRegions;
- (void)_overflowScrollPositionChangedTo:(struct CGPoint)arg1 forNode:(id)arg2 isUserScroll:(BOOL)arg3;
- (void)_setCustomFixedPositionLayoutRect:(struct CGRect)arg1;
- (void)_setCustomFixedPositionLayoutRectInWebThread:(struct CGRect)arg1 synchronize:(BOOL)arg2;
- (void)_synchronizeCustomFixedPositionLayoutRect;
- (struct CGSize)_fixedLayoutSize;
- (void)_setFixedLayoutSize:(struct CGSize)arg1;
- (void)_setNetworkStateIsOnline:(BOOL)arg1;
- (BOOL)_allowsMessaging;
- (void)_setAllowsMessaging:(BOOL)arg1;
- (BOOL)_isClosing;
- (BOOL)_isStopping;
- (id)quickLookContentForURL:(id)arg1;
- (void)setDefersCallbacks:(BOOL)arg1;
- (BOOL)defersCallbacks;
- (struct CGColor *)backgroundColor;
- (void)setBackgroundColor:(struct CGColor *)arg1;
- (void)_detachScriptDebuggerFromAllFrames;
- (void)_attachScriptDebuggerToAllFrames;
- (void)_setNeedsUnrestrictedGetMatchedCSSRules:(BOOL)arg1;
- (BOOL)_setMediaLayer:(id)arg1 forPluginView:(id)arg2;
- (void)_restorePlugInsFromCache;
- (void)_stopAllPlugInsForPageCache;
- (void)_stopAllPlugIns;
- (void)_startAllPlugIns;
- (void)_clearBackForwardCache;
- (void)_destroyAllPlugIns;
- (void)_locked_recursivelyPerformPlugInSelector:(SEL)arg1 inFrame:(id)arg2;
- (BOOL)_pluginsAreRunning;
- (BOOL)_locked_plugInsAreRunningInFrame:(id)arg1;
- (void)_setCookieEnabled:(BOOL)arg1;
- (BOOL)_cookieEnabled;
- (BOOL)_inFastImageScalingMode;
- (void)_setUseFastImageScalingMode:(BOOL)arg1;
- (BOOL)_inViewSourceMode;
- (void)_setInViewSourceMode:(BOOL)arg1;
- (void)_setFontFallbackPrefersPictographs:(BOOL)arg1;
- (id)_displayURL;
- (void)_clearDelegates;
- (void)caretChanged;
- (void)removeAllCaretChangeListeners;
- (void)removeCaretChangeListener:(id)arg1;
- (void)addCaretChangeListener:(id)arg1;
- (id)caretChangeListeners;
- (void)setCaretChangeListener:(id)arg1;
- (id)caretChangeListener;
- (id)_webMailDelegate;
- (void)setWebMailDelegate:(id)arg1;
- (id)_UIKitDelegate;
- (void)_setUIKitDelegate:(id)arg1;
- (void)_didCommitLoadForFrame:(id)arg1;
- (BOOL)_isPerformingProgrammaticFocus;
- (void)_popPerformingProgrammaticFocus;
- (void)_pushPerformingProgrammaticFocus;
- (void)_closeWindow;
- (id)_editingDelegateForwarder;
- (id)_UIDelegateForSelector:(SEL)arg1;
- (id)_UIDelegateForwarder;
- (id)_policyDelegateForwarder;
- (void)_cacheHistoryDelegateImplementations;
- (void)_cacheScriptDebugDelegateImplementations;
- (void)_cacheFrameLoadDelegateImplementations;
- (void)_cacheResourceLoadDelegateImplementations;
- (id)_UIKitDelegateForwarder;
- (void)_preferencesChanged:(id)arg1;
- (void)_preferencesChangedNotification:(id)arg1;
- (BOOL)_needsUnrestrictedGetMatchedCSSRules;
- (BOOL)_needsPreHTML5ParserQuirks;
- (id)_formDelegateForSelector:(SEL)arg1;
- (id)_formDelegateForwarder;
- (id)_formDelegate;
- (void)_setFormDelegate:(id)arg1;
- (void)_loadBackForwardListFromOtherView:(id)arg1;
- (void)_mouseDidMoveOverElement:(id)arg1 modifierFlags:(unsigned int)arg2;
- (struct Page *)page;
- (id)remoteInspectorUserInfo;
- (void)setRemoteInspectorUserInfo:(id)arg1;
- (id)hostApplicationName;
- (id)hostApplicationBundleId;
- (void)setHostApplicationBundleId:(id)arg1 name:(id)arg2;
- (void)setIndicatingForRemoteInspector:(BOOL)arg1;
- (void)setAllowsRemoteInspection:(BOOL)arg1;
- (BOOL)allowsRemoteInspection;
- (BOOL)canBeRemotelyInspected;
- (id)inspector;
- (id)_openNewWindowWithRequest:(id)arg1;
- (id)_downloadURL:(id)arg1;
- (BOOL)_isProcessingUserGesture;
- (void)_close;
- (void)_closeWithFastTeardown;
- (void)_closePluginDatabases;
- (void)_setResourceLoadSchedulerSuspended:(BOOL)arg1;
- (void)_didFinishScrollingOrZooming;
- (void)_willStartScrollingOrZooming;
- (void)_dispatchTileDidDraw:(id)arg1;
- (id)styleAtSelectionStart;
- (void)_dispatchUnloadEvent;
- (BOOL)_isClosed;
- (BOOL)_viewClass:(Class *)arg1 andRepresentationClass:(Class *)arg2 forMIMEType:(id)arg3;
- (void)updateLayoutIgnorePendingStyleSheets;
- (id)initSimpleHTMLDocumentWithStyle:(id)arg1 frame:(struct CGRect)arg2 preferences:(id)arg3 groupName:(id)arg4;
- (void)_viewWillDrawInternal;
- (id)_initWithFrame:(struct CGRect)arg1 frameName:(id)arg2 groupName:(id)arg3 usesDocumentViews:(BOOL)arg4;
- (void)_commonInitializationWithFrameName:(id)arg1 groupName:(id)arg2;
- (void)_dispatchPendingLoadRequests;
- (void)_setUIWebViewUserAgentWithBuildVersion:(id)arg1;
- (void)_setBrowserUserAgentProductVersion:(id)arg1 buildVersion:(id)arg2 bundleVersion:(id)arg3;
- (void)makeTextStandardSize:(id)arg1;
- (BOOL)canMakeTextStandardSize;
- (void)makeTextLarger:(id)arg1;
- (BOOL)canMakeTextLarger;
- (void)makeTextSmaller:(id)arg1;
- (BOOL)canMakeTextSmaller;
- (void)reloadFromOrigin:(id)arg1;
- (void)reload:(id)arg1;
- (void)stopLoadingAndClear;
- (void)stopLoading:(id)arg1;
- (void)goForward:(id)arg1;
- (void)goBack:(id)arg1;
- (BOOL)canGoForward;
- (BOOL)canGoBack;
- (void)takeStringURLFrom:(id)arg1;
- (void)removeVisitedLink:(id)arg1;
- (void)addVisitedLinks:(id)arg1;
- (float)mediaVolume;
- (void)setMediaVolume:(float)arg1;
- (void)resetPageZoom:(id)arg1;
- (BOOL)canResetPageZoom;
- (void)zoomPageOut:(id)arg1;
- (BOOL)canZoomPageOut;
- (void)zoomPageIn:(id)arg1;
- (BOOL)canZoomPageIn;
- (float)pageSizeMultiplier;
- (void)setPageSizeMultiplier:(float)arg1;
- (void)setAllowsUndo:(BOOL)arg1;
- (BOOL)allowsUndo;
- (void)scrollDOMRangeToVisible:(id)arg1 withInset:(float)arg2;
- (void)scrollDOMRangeToVisible:(id)arg1;
- (id)rectsForTextMatches;
- (void)unmarkAllTextMatches;
- (unsigned int)countMatchesForText:(id)arg1 inDOMRange:(id)arg2 options:(unsigned int)arg3 highlight:(BOOL)arg4 limit:(unsigned int)arg5 markMatches:(BOOL)arg6;
- (unsigned int)countMatchesForText:(id)arg1 options:(unsigned int)arg2 highlight:(BOOL)arg3 limit:(unsigned int)arg4 markMatches:(BOOL)arg5;
- (BOOL)canMarkAllTextMatches;
- (BOOL)shouldClose;
- (id)historyDelegate;
- (void)setHistoryDelegate:(id)arg1;
- (id)scriptDebugDelegate;
- (void)setScriptDebugDelegate:(id)arg1;
- (BOOL)tabKeyCyclesThroughElements;
- (void)setTabKeyCyclesThroughElements:(BOOL)arg1;
- (void)setMainFrameDocumentReady:(BOOL)arg1;
- (id)DOMRangeOfString:(id)arg1 relativeTo:(id)arg2 options:(unsigned int)arg3;
- (BOOL)findString:(id)arg1 options:(unsigned int)arg2;
- (id)computedStyleForElement:(id)arg1 pseudoElement:(id)arg2;
- (id)styleDeclarationWithText:(id)arg1;
- (id)editingDelegate;
- (void)setEditingDelegate:(id)arg1;
- (void)registerForEditingDelegateNotification:(id)arg1 selector:(SEL)arg2;
- (id)undoManager;
- (BOOL)isContinuousSpellCheckingEnabled;
- (void)setContinuousSpellCheckingEnabled:(BOOL)arg1;
- (BOOL)smartInsertDeleteEnabled;
- (void)setSmartInsertDeleteEnabled:(BOOL)arg1;
- (id)typingStyle;
- (void)setTypingStyle:(id)arg1;
- (BOOL)isEditable;
- (void)setEditable:(BOOL)arg1;
- (int)selectionAffinity;
- (id)selectedDOMRange;
- (void)setSelectedDOMRange:(id)arg1 affinity:(int)arg2;
- (BOOL)maintainsInactiveSelection;
- (BOOL)_shouldChangeSelectedDOMRange:(id)arg1 toDOMRange:(id)arg2 affinity:(int)arg3 stillSelecting:(BOOL)arg4;
- (id)editableDOMRangeForPoint:(struct CGPoint)arg1;
- (BOOL)isAutomaticSpellingCorrectionEnabled;
- (BOOL)isAutomaticTextReplacementEnabled;
- (BOOL)isAutomaticDashSubstitutionEnabled;
- (BOOL)isAutomaticLinkDetectionEnabled;
- (BOOL)isAutomaticQuoteSubstitutionEnabled;
- (void)applyStyle:(id)arg1;
- (void)deleteSelection;
- (void)replaceSelectionWithArchive:(id)arg1;
- (void)replaceSelectionWithMarkupString:(id)arg1;
- (void)replaceSelectionWithText:(id)arg1;
- (void)replaceSelectionWithNode:(id)arg1;
- (id)typingAttributes;
- (void)insertText:(id)arg1;
- (void)insertDictationPhrases:(id)arg1 metadata:(id)arg2;
- (void)toggleUnderline:(id)arg1;
- (void)toggleItalic:(id)arg1;
- (void)toggleBold:(id)arg1;
- (void)clearText:(id)arg1;
- (void)yankAndSelect:(id)arg1;
- (void)yank:(id)arg1;
- (void)uppercaseWord:(id)arg1;
- (void)unscript:(id)arg1;
- (void)underline:(id)arg1;
- (void)transpose:(id)arg1;
- (void)toggleBaseWritingDirection:(id)arg1;
- (void)takeFindStringFromSelection:(id)arg1;
- (void)swapWithMark:(id)arg1;
- (void)superscript:(id)arg1;
- (void)subscript:(id)arg1;
- (void)stopSpeaking:(id)arg1;
- (void)startSpeaking:(id)arg1;
- (void)showGuessPanel:(id)arg1;
- (void)setMark:(id)arg1;
- (void)selectWord:(id)arg1;
- (void)selectToMark:(id)arg1;
- (void)selectSentence:(id)arg1;
- (void)selectParagraph:(id)arg1;
- (void)selectLine:(id)arg1;
- (void)selectAll:(id)arg1;
- (void)scrollToEndOfDocument:(id)arg1;
- (void)scrollToBeginningOfDocument:(id)arg1;
- (void)scrollPageUp:(id)arg1;
- (void)scrollPageDown:(id)arg1;
- (void)scrollLineUp:(id)arg1;
- (void)scrollLineDown:(id)arg1;
- (void)performFindPanelAction:(id)arg1;
- (void)pasteFont:(id)arg1;
- (void)pasteAsRichText:(id)arg1;
- (void)pasteAsPlainText:(id)arg1;
- (void)paste:(id)arg1;
- (void)pageUpAndModifySelection:(id)arg1;
- (void)pageUp:(id)arg1;
- (void)pageDownAndModifySelection:(id)arg1;
- (void)pageDown:(id)arg1;
- (void)orderFrontSubstitutionsPanel:(id)arg1;
- (void)outdent:(id)arg1;
- (void)moveWordRightAndModifySelection:(id)arg1;
- (void)moveWordRight:(id)arg1;
- (void)moveWordLeftAndModifySelection:(id)arg1;
- (void)moveWordLeft:(id)arg1;
- (void)moveWordForwardAndModifySelection:(id)arg1;
- (void)moveWordForward:(id)arg1;
- (void)moveWordBackwardAndModifySelection:(id)arg1;
- (void)moveWordBackward:(id)arg1;
- (void)moveUpAndModifySelection:(id)arg1;
- (void)moveUp:(id)arg1;
- (void)moveToRightEndOfLineAndModifySelection:(id)arg1;
- (void)moveToRightEndOfLine:(id)arg1;
- (void)moveToLeftEndOfLineAndModifySelection:(id)arg1;
- (void)moveToLeftEndOfLine:(id)arg1;
- (void)moveToEndOfSentenceAndModifySelection:(id)arg1;
- (void)moveToEndOfSentence:(id)arg1;
- (void)moveToEndOfParagraphAndModifySelection:(id)arg1;
- (void)moveToEndOfParagraph:(id)arg1;
- (void)moveToEndOfLineAndModifySelection:(id)arg1;
- (void)moveToEndOfLine:(id)arg1;
- (void)moveToEndOfDocumentAndModifySelection:(id)arg1;
- (void)moveToEndOfDocument:(id)arg1;
- (void)moveToBeginningOfSentenceAndModifySelection:(id)arg1;
- (void)moveToBeginningOfSentence:(id)arg1;
- (void)moveToBeginningOfParagraphAndModifySelection:(id)arg1;
- (void)moveToBeginningOfParagraph:(id)arg1;
- (void)moveToBeginningOfLineAndModifySelection:(id)arg1;
- (void)moveToBeginningOfLine:(id)arg1;
- (void)moveToBeginningOfDocumentAndModifySelection:(id)arg1;
- (void)moveToBeginningOfDocument:(id)arg1;
- (void)moveRightAndModifySelection:(id)arg1;
- (void)moveRight:(id)arg1;
- (void)moveParagraphForwardAndModifySelection:(id)arg1;
- (void)moveParagraphBackwardAndModifySelection:(id)arg1;
- (void)moveLeftAndModifySelection:(id)arg1;
- (void)moveLeft:(id)arg1;
- (void)moveForwardAndModifySelection:(id)arg1;
- (void)moveForward:(id)arg1;
- (void)moveDownAndModifySelection:(id)arg1;
- (void)moveDown:(id)arg1;
- (void)moveBackwardAndModifySelection:(id)arg1;
- (void)moveBackward:(id)arg1;
- (void)makeTextWritingDirectionRightToLeft:(id)arg1;
- (void)makeTextWritingDirectionNatural:(id)arg1;
- (void)makeTextWritingDirectionLeftToRight:(id)arg1;
- (void)makeBaseWritingDirectionRightToLeft:(id)arg1;
- (void)makeBaseWritingDirectionLeftToRight:(id)arg1;
- (void)lowercaseWord:(id)arg1;
- (void)insertTabIgnoringFieldEditor:(id)arg1;
- (void)insertTab:(id)arg1;
- (void)insertParagraphSeparator:(id)arg1;
- (void)insertNewlineIgnoringFieldEditor:(id)arg1;
- (void)insertNewline:(id)arg1;
- (void)insertLineBreak:(id)arg1;
- (void)insertBacktab:(id)arg1;
- (void)indent:(id)arg1;
- (void)ignoreSpelling:(id)arg1;
- (void)deleteWordForward:(id)arg1;
- (void)deleteWordBackward:(id)arg1;
- (void)deleteToMark:(id)arg1;
- (void)deleteToEndOfParagraph:(id)arg1;
- (void)deleteToEndOfLine:(id)arg1;
- (void)deleteToBeginningOfParagraph:(id)arg1;
- (void)deleteToBeginningOfLine:(id)arg1;
- (void)deleteForward:(id)arg1;
- (void)deleteBackwardByDecomposingPreviousCharacter:(id)arg1;
- (void)deleteBackward:(id)arg1;
- (void)delete:(id)arg1;
- (void)cut:(id)arg1;
- (void)copyFont:(id)arg1;
- (void)copy:(id)arg1;
- (void)complete:(id)arg1;
- (void)checkSpelling:(id)arg1;
- (void)changeSpelling:(id)arg1;
- (void)changeFont:(id)arg1;
- (void)changeDocumentBackgroundColor:(id)arg1;
- (void)changeColor:(id)arg1;
- (void)changeBaseWritingDirectionToRTL:(id)arg1;
- (void)changeBaseWritingDirectionToLTR:(id)arg1;
- (void)changeBaseWritingDirection:(id)arg1;
- (void)changeAttributes:(id)arg1;
- (void)centerSelectionInVisibleArea:(id)arg1;
- (void)capitalizeWord:(id)arg1;
- (void)alignRight:(id)arg1;
- (void)alignLeft:(id)arg1;
- (void)alignJustified:(id)arg1;
- (void)alignCenter:(id)arg1;
- (void)_performResponderOperation:(SEL)arg1 with:(id)arg2;
- (void)_simplifyMarkup:(id)arg1 endNode:(id)arg2;
- (BOOL)_selectionIsAll;
- (BOOL)_selectionIsCaret;
- (void)_replaceSelectionWithNode:(id)arg1 matchStyle:(BOOL)arg2;
- (void)_insertNewlineInQuotedContent;
- (id)_responderForResponderOperations;
- (BOOL)_continuousCheckingAllowed;
- (id)_frameViewAtWindowPoint:(struct CGPoint)arg1;
- (BOOL)_isLoading;
- (id)_focusedFrame;
- (struct CGRect)_convertRectFromRootView:(struct CGRect)arg1;
- (struct CGPoint)_convertPointFromRootView:(struct CGPoint)arg1;
- (void)_scheduleCompositingLayerSync;
- (BOOL)_syncCompositingChanges;
- (void)_setNeedsOneShotDrawingSynchronization:(BOOL)arg1;
- (BOOL)_needsOneShotDrawingSynchronization;
- (id)_selectedOrMainFrame;
- (struct Frame *)_mainCoreFrame;
- (int)_keyboardUIMode;
- (void)_retrieveKeyboardUIModeFromPreferences:(id)arg1;
- (void)_removeObjectForIdentifier:(unsigned long)arg1;
- (id)_objectForIdentifier:(unsigned long)arg1;
- (void)_addObject:(id)arg1 forIdentifier:(unsigned long)arg2;
- (BOOL)_becomingFirstResponderFromOutside;
- (id)_deviceOrientationProvider;
- (void)_setDeviceOrientationProvider:(id)arg1;
- (void)_resetAllGeolocationPermission;
- (void)_geolocationDidFailWithError:(id)arg1;
- (void)_geolocationDidChangePosition:(id)arg1;
- (id)_geolocationProvider;
- (void)_setGeolocationProvider:(id)arg1;
- (void)_notificationsDidClose:(id)arg1;
- (void)_notificationDidClick:(unsigned long long)arg1;
- (void)_notificationDidShow:(unsigned long long)arg1;
- (id)_notificationProvider;
- (void)_notificationControllerDestroyed;
- (void)_setNotificationProvider:(id)arg1;
- (struct OpaqueJSValue *)_computedStyleIncludingVisitedInfo:(struct OpaqueJSContext *)arg1 forElement:(struct OpaqueJSValue *)arg2;

@end

把它和Mac上的WebView聲明對比，可以發現有很多相同的函數。Mac的WebView繼承自NSView，就像UIWebView一樣是在Mac上直接給開發者使用的接口，而iOS的WebView繼承自WAKView，如同《WebCore::Widget淺探》裏所述，這個WAKView就是模仿NSView的，所以通過這樣的模仿和繼承，可以做較少改動令WebView在Mac和iOS上共用。以下幾個函數

findString(WAKView*, NSString*, unsigned int)
WebCore::Chrome::focusNSView(WAKView*)
WebCore::Widget::setPlatformWidget(WAKView*)
WebCore::Widget::Widget(WAKView*)
WebCore::FrameView::graphicsLayerForPlatformWidget(WAKView*)
WebCore::findViewInSubviews(WAKView*, WAKView*)
setDocumentViewOrigin(WAKScrollView*, WAKView*, CGPoint)
WebCore::Widget::init(WAKView*)
WebCore::Widget::addToSuperview(WAKView*)
WebCore::Chrome::focusNSView(WAKView*)
WebCore::Widget::setPlatformWidget(WAKView*)
WebCore::Widget::Widget(WAKView*)
WebCore::FrameView::graphicsLayerForPlatformWidget(WAKView*)

中，特別是 focusNSView(WAKView*) 這個函數，函數名叫NSView，參數卻是WAKView，較顯然地支持這個“模仿”的判斷。

那爲什麼在iOS不公開WebView呢？我覺得是因爲Mac WebView的實現是單線程的，而iOS是多線程的，必然有很多的lock，而且線程間轉發消息也必然犧牲效率。如果直接公開WebView，讓開發者隨意用WebView的接口反而會招致抱怨，這些接口實現裏的鎖會令主線程卡頓，用戶體驗就因此降低了，還不如不公開——沒得用你也就沒得罵。

經過這樣的處理後被UIWebDocumentView封裝，WebView在iOS上就像是個數據流處理模塊，由UIWebDocumentView對其進行操作並接收事件回調通知。所以說，WebView以及UIWebDocumentView合起來就像是MVC中的Model，當Model發送變化，就通知UIWebTiledView重繪。更進一步講，UIWebDocumentView是WebView的Controller。

關於WebView暫不深入，後面再有一節來講。

UIWebDocumentView的聲明如下：（代碼好長，點此跳過）

@interface UIWebDocumentView : UIWebTiledView <UIActionSheetDelegate, _UIRotatingActionSheetDelegate, UITextAutoscrolling, UIAutoscrollContainer, UIGestureRecognizerDelegate, UIKeyboardInput, UIKeyInput, UIModalViewDelegate, UITextInputTokenizer, _UIWebDoubleTapDelegate, UIWebFileUploadPanelDelegate>
{
    struct WKWindow *_wkWindow;
    WebView *_webView;
    WebViewReachabilityObserver *_reachabilityObserver;
    id m_parentTextView;
    id _delegate;       // 地址偏移28
    id _textSuggestionDelegate;
    struct CGRect _doubleTapRect;
    struct CGRect _mainDocumentDoubleTapRect;
    struct CGPoint _scrollPoint;
    struct CGPoint _doubleTapStartPosition;
    double _doubleTapStartTime;
    struct CGSize _pendingSize;
    int _orientation;
    DOMHTMLElement *_standaloneEditingElement;
    struct CGPoint _mouseDownPoint;
    double _mouseDownTime;
    UIAutoscroll *_autoscroll;
    struct __CFDictionary *_plugInViews;
    int m_selectionGranularity;
    CALayer *_contentLayersHostingLayer;
    CALayer *_flattenedRotatingContentLayer;
    NSMutableSet *_overflowScrollViewsPendingInsertion;
    NSMutableSet *_overflowScrollViewsPendingDeletion;
    NSMutableSet *_overflowScrollViews;
    NSArray *_additionalSubviews;
    UITextInputTraits *_traits;
    id <UITextInputDelegate> _inputDelegate;
    UITapGestureRecognizer *_singleTapGestureRecognizer;
    UITapGestureRecognizer *_doubleTapGestureRecognizer;
    UITapGestureRecognizer *_twoFingerDoubleTapGestureRecognizer;
    UILongPressGestureRecognizer *_highlightLongPressGestureRecognizer;
    UILongPressGestureRecognizer *_longPressGestureRecognizer;
    UIPanGestureRecognizer *_twoFingerPanGestureRecognizer;
    struct {
        NSTimer *timer;
        struct CGPoint location;
        char isBlocked;
        char isCancelled;
        char isOnWebThread;
        char isDisplayingHighlight;
        char attemptedClick;
        struct CGPoint lastPanTranslation;
        DOMNode *element;
        id delegate;
        UIWebRotatingSheet *interactionSheet;
        NSArray *elementActions;
        char allowsImageSheet;
        char allowsDataDetectorsSheet;
        char allowsLinkSheet;
        char acceptsFirstResponder;
        float documentScale;
    } _interaction;
    struct UIWebDocumentViewViewportConfiguration _defaultViewportConfigurations[5];
    struct UIWebDocumentViewViewportConfiguration _currentViewportConfiguration;
    struct CGSize _minimumSize;
    int _documentType;
    float _documentScale;
    float _previousDocumentScale;
    struct CGRect _documentBounds;
    struct CGSize _fixedLayoutOriginRoundingDelta;
    struct CGSize _fixedLayoutSizeRoundingDelta;
    unsigned int _customConfigurations;
    unsigned int _mouseDownCount;
    unsigned int _dataDetectorTypes;
    unsigned int _webCoreNeedsSetNeedsDisplay:1;
    unsigned int _webCoreNeedsDraw:1;
    unsigned int _ignoresFocusingMouse:1;
    unsigned int _ignoresKeyEvents:1;
    unsigned int _autoresizes:1;
    unsigned int _ignoresViewportOverflowWhenAutoresizing:1;
    unsigned int _updatingSize:1;
    unsigned int _scalesToFit:1;
    unsigned int _updatesScrollView:1;
    unsigned int _hasCustomScale:1;
    unsigned int _shouldRestoreScrollPosition:1;
    unsigned int _pageNeedsReset:1;
    unsigned int _hasScrollPoint:1;
    unsigned int _gesturesDisabled:1;
    unsigned int _doubleTapRectIsReplaced:1;
    unsigned int _standaloneEditableView:1;
    unsigned int _widgetEditingView:1;
    unsigned int _mouseDragged:1;
    unsigned int _mouseReentrancyGuard:1;
    unsigned int _isShowingFullScreenPlugIn:1;
    unsigned int _isSettingRedrawFrame:1;
    unsigned int _needsScrollNotifications:1;
    unsigned int _loadsSynchronously:1;
    unsigned int _mouseDown:1;
    unsigned int _usePreTimberlineTransparencyBehavior:1;
    unsigned int _geolocationDialogAllowed:1;
    unsigned int _usingMinimalTilesDuringLoading:1;
    unsigned int _sheetsCount:2;
    unsigned int _didFirstVisuallyNonEmptyLayout:1;
    unsigned int _loadInProgress:1;
    unsigned int _uiwdvIsResigningFirstResponder:1;
    unsigned int _classicViewportMode:1;
    unsigned int _sizeUpdatesSuspended:1;
    unsigned int _sizeUpdateOccurredWhileSuspended:1;
    unsigned int _shouldOnlyRecognizeGesturesOnActiveElements:1;
    unsigned int _shouldIgnoreCustomViewport:1;
    unsigned int _ignoresFocusEventFromFirstResponderChange:1;
    unsigned int _shouldCloseWebViewAtDealloc:1;
    unsigned int _shouldRemoveUserStyleSheet:1;
    unsigned int _hasDrawnTiles:1;
    unsigned int _showingTextStyleOptions:1;
    unsigned int _subviewCachesNeedUpdate:1;
    unsigned int _avoidFixedPositionUpdateViaDidScroll:1;
    unsigned int _inspectorSearchingForNode:1;
    unsigned int _previousScrollWasScrollToTop:1;
    unsigned int _skipResettingNeedsScrollNotifications:1;
    WebThreadSafeUndoManager *_undoManager;
    UIWebSelectionAssistant *_webSelectionAssistant;
    UITextInteractionAssistant *_textSelectionAssistant;
    UITextChecker *_textChecker;
    struct UIEdgeInsets _caretInsets;
    UIWebFileUploadPanel *_fileUploadPanel;
    int _selectionAffinity;
    DOMElement *_dictationResultPlaceholder;
    id _dictationResultPlaceholderRemovalObserver;
    DOMRange *_rangeToRestoreAfterDictation;
    _UITextServiceSession *_definitionSession;
    _UITextServiceSession *_learnSession;
    BOOL _suppressesIncrementalRendering;
}

+ (id)standardTextViewPreferences;
+ (BOOL)hasLandscapeOrientation;
+ (void)initialize;
+ (double)getTimestamp;
+ (Class)layerClass;
+ (id)_sharedHighlightView;
+ (id)_createDefaultHighlightView;
@property(nonatomic) BOOL suppressesIncrementalRendering; // @synthesize suppressesIncrementalRendering=_suppressesIncrementalRendering;
@property(retain, nonatomic) DOMRange *rangeToRestoreAfterDictation; // @synthesize rangeToRestoreAfterDictation=_rangeToRestoreAfterDictation;
- (void)willZoomToLocation:(struct CGPoint)arg1 atScale:(float)arg2 forDuration:(double)arg3;
- (BOOL)shouldSelectionAssistantReceiveDoubleTapAtPoint:(struct CGPoint)arg1 forScale:(float)arg2;
- (void)willZoomToMinimumScale;
- (BOOL)considerHeightForDoubleTap;
- (CDStruct_869f9c67)doubleTapScalesForSize:(struct CGSize)arg1;
- (struct CGRect)rectOfInterestForPoint:(struct CGPoint)arg1;
- (float)minimumScaleForSize:(struct CGSize)arg1;
- (struct CGRect)visibleContentRect;
- (float)currentDocumentScale;
- (float)zoomedDocumentScale;
- (id)contentView;
- (id)enclosingScrollView;
- (BOOL)_isInspectorSearchingForNode;
- (BOOL)_shouldResetForNewPage;
- (int)documentType;
- (id)_documentUrl;
- (id)selectionRectsForRange:(id)arg1;
@property(nonatomic) int selectionGranularity;
@property(nonatomic) int selectionAffinity;
- (void)setBaseWritingDirection:(int)arg1 forRange:(id)arg2;
- (int)baseWritingDirectionForPosition:(id)arg1 inDirection:(int)arg2;
- (id)characterRangeByExtendingPosition:(id)arg1 inDirection:(int)arg2;
- (id)positionWithinRange:(id)arg1 farthestInDirection:(int)arg2;
- (id)characterRangeAtPoint:(struct CGPoint)arg1;
- (id)closestPositionToPoint:(struct CGPoint)arg1 withinRange:(id)arg2;
- (id)closestPositionToPoint:(struct CGPoint)arg1;
@property(copy, nonatomic) NSDictionary *markedTextStyle;
- (struct CGRect)caretRectForPosition:(id)arg1;
@property(nonatomic) id <UITextInputDelegate> inputDelegate;
@property(readonly, nonatomic) id <UITextInputTokenizer> tokenizer;
- (struct CGRect)_lastRectForRange:(id)arg1;
- (struct CGRect)firstRectForRange:(id)arg1;
- (id)rangeEnclosingPosition:(id)arg1 withGranularity:(int)arg2 inDirection:(int)arg3;
- (void)_scrollRectToVisible:(struct CGRect)arg1 animated:(BOOL)arg2;
- (BOOL)isPosition:(id)arg1 withinTextUnit:(int)arg2 inDirection:(int)arg3;
- (id)positionFromPosition:(id)arg1 toBoundary:(int)arg2 inDirection:(int)arg3;
- (BOOL)isPosition:(id)arg1 atBoundary:(int)arg2 inDirection:(int)arg3;
- (id)positionFromPosition:(id)arg1 inDirection:(int)arg2 offset:(int)arg3;
- (id)_positionFromPosition:(id)arg1 inDirection:(int)arg2 offset:(int)arg3 withAffinityDownstream:(BOOL)arg4;
- (id)positionFromPosition:(id)arg1 offset:(int)arg2;
- (int)offsetFromPosition:(id)arg1 toPosition:(id)arg2;
- (int)comparePosition:(id)arg1 toPosition:(id)arg2;
- (void)replaceRange:(id)arg1 withText:(id)arg2;
- (id)rangeOfEnclosingWord:(id)arg1;
- (id)textRangeFromPosition:(id)arg1 toPosition:(id)arg2;
- (id)textInRange:(id)arg1;
@property(readonly, nonatomic) UITextPosition *endOfDocument;
@property(readonly, nonatomic) UITextPosition *beginningOfDocument;
- (void)unmarkText;
@property(readonly, nonatomic) UITextRange *markedTextRange;
- (void)setSelectedTextRange:(id)arg1 withAffinityDownstream:(BOOL)arg2;
@property(copy) UITextRange *selectedTextRange;
- (BOOL)hasText;
- (id)_textSelectingContainer;
- (BOOL)hasSimpleTextOnlyStructure;
- (BOOL)containsOnlySelectableElements;
- (void)setTileUpdatesDisabled:(BOOL)arg1;
- (void)_restoreFlattenedContentLayers;
- (void)_flattenAndSwapContentLayersInRect:(struct CGRect)arg1;
- (void *)_createIOSurfaceFromRect:(struct CGRect)arg1;
- (BOOL)_shouldFlattenContentLayersForRect:(struct CGRect)arg1;
- (unsigned int)_contentSizeInExposedRect:(struct CGRect)arg1 topLayer:(id)arg2 visibleLayerCount:(int *)arg3;
- (BOOL)_shouldUseInitialScale;
- (float)maximumDoubleTapScale;
- (void)didEndZoom;
- (void)didZoom;
- (void)willStartZoom;
- (void)scrollViewWasRemoved;
- (void)didEndScroll;
- (void)_updateFixedPositioningObjectsLayoutAfterVisibleGeometryChange;
- (void)_updateFixedPositioningObjectsLayoutAfterScroll;
- (void)willStartScrollToTop;
- (void)willStartScroll;
- (void)useSelectionAssistantWithMode:(int)arg1;
- (void)setBecomesEditableWithGestures:(BOOL)arg1;
- (BOOL)becomesEditableWithGestures;
- (BOOL)playsNicelyWithGestures;
- (struct CGRect)autoscrollContentFrame;
- (struct CGRect)autoscrollDragFrame;
- (struct CGRect)visibleContentFrame;
- (struct CGRect)visibleFrame;
- (BOOL)canPerformAction:(SEL)arg1 withSender:(id)arg2;
- (BOOL)inPopover;
- (BOOL)isCaretInEmptyParagraph;
- (id)webSelectionAssistant;
- (void)makeTextWritingDirectionLeftToRight:(id)arg1;
- (void)makeTextWritingDirectionRightToLeft:(id)arg1;
- (void)_promptForReplace:(id)arg1;
- (void)replace:(id)arg1;
- (void)selectAll:(id)arg1;
- (void)select:(id)arg1;
- (void)paste:(id)arg1;
- (void)_addShortcut:(id)arg1;
- (void)_define:(id)arg1;
- (struct CGRect)_shortcutPresentationRect;
- (void)_showTextStyleOptions:(id)arg1;
- (void)toggleUnderline:(id)arg1;
- (void)toggleItalics:(id)arg1;
- (void)toggleBoldface:(id)arg1;
- (void)copy:(id)arg1;
- (void)cut:(id)arg1;
- (struct CGRect)_selectionClipRect;
- (void)updateSelection;
- (void)endSelectionChange;
- (void)beginSelectionChange;
- (BOOL)isEditing;
- (BOOL)isEditable;
@property(readonly, nonatomic) UITextInteractionAssistant *interactionAssistant;
- (id)selectionView;
- (void)takeTraitsFrom:(id)arg1;
- (id)methodSignatureForSelector:(SEL)arg1;
- (void)forwardInvocation:(id)arg1;
- (id)textInputTraits;
- (void)webView:(id)arg1 willAddPlugInView:(id)arg2;
- (BOOL)hasPlugInSubviews;
- (BOOL)isShowingFullScreenPlugInUI;
- (void)didRemovePlugInView:(id)arg1;
- (void)webView:(id)arg1 didHideFullScreenForPlugInView:(id)arg2;
- (void)webView:(id)arg1 willShowFullScreenForPlugInView:(id)arg2;
- (id)webView:(id)arg1 plugInViewWithArguments:(id)arg2 fromPlugInPackage:(id)arg3;
- (void)setPaused:(BOOL)arg1 withEvents:(BOOL)arg2;
- (void)setPaused:(BOOL)arg1;
- (void)handleKeyWebEvent:(id)arg1;
- (BOOL)requiresKeyEvents;
- (void)setBottomBufferHeight:(float)arg1;
- (id)automaticallySelectedOverlay;
- (void)keyboardInputChangedSelection:(id)arg1;
- (BOOL)keyboardInputChanged:(id)arg1;
- (BOOL)keyboardInputShouldDelete:(id)arg1;
- (BOOL)keyboardInput:(id)arg1 shouldInsertText:(id)arg2 isMarkedText:(BOOL)arg3;
- (BOOL)keyboardInput:(id)arg1 shouldReplaceTextInRange:(struct _NSRange)arg2 replacementText:(id)arg3;
- (id)implementationWebView;
- (struct CGRect)convertCaretRect:(struct CGRect)arg1;
- (void)setCaretChangeListener:(id)arg1;
- (BOOL)hasContent;
- (id)text;
- (void)setText:(id)arg1;
- (void)selectAll;
- (void)moveForward:(unsigned int)arg1;
- (void)moveBackward:(unsigned int)arg1;
- (BOOL)selectionAtWordStart;
- (BOOL)selectionAtDocumentStart;
- (BOOL)hasSelection;
- (void)extendCurrentSelection:(int)arg1;
- (id)rangeByExtendingCurrentSelection:(int)arg1;
- (id)rangeByMovingCurrentSelection:(int)arg1;
- (void)setSelectedDOMRange:(id)arg1 affinityDownstream:(BOOL)arg2;
- (id)selectedDOMRange;
- (struct _NSRange)selectionRange;
- (struct _NSRange)_markedTextNSRange;
- (void)replaceSelectionWithWebArchive:(id)arg1 selectReplacement:(BOOL)arg2 smartReplace:(BOOL)arg3;
- (int)wordOffsetInRange:(id)arg1;
- (void)expandSelectionToStartOfWordContainingCaretSelection;
- (id)wordContainingCaretSelection;
- (id)nextUnperturbedDictationResultBoundaryFromPosition:(id)arg1;
- (id)previousUnperturbedDictationResultBoundaryFromPosition:(id)arg1;
- (id)wordRangeContainingCaretSelection;
- (struct CGRect)rectContainingCaretSelection;
- (id)rectsForNSRange:(struct _NSRange)arg1;
- (struct CGRect)rectForNSRange:(struct _NSRange)arg1;
- (id)textColorForCaretSelection;
- (id)fontForCaretSelection;
- (unsigned short)characterAfterCaretSelection;
- (unsigned short)characterBeforeCaretSelection;
- (unsigned short)characterInRelationToCaretSelection:(int)arg1;
- (id)markedText;
- (void)confirmMarkedText:(id)arg1;
- (void)setMarkedText:(id)arg1 selectedRange:(struct _NSRange)arg2;
- (void)setMarkedText:(id)arg1;
- (void)replaceCurrentWordWithText:(id)arg1;
- (void)replaceRangeWithText:(struct _NSRange)arg1 replacementText:(id)arg2;
- (void)replaceRangeWithTextWithoutClosingTyping:(id)arg1 replacementText:(id)arg2;
- (id)dictationInterpretations;
- (void)removeDictationResultPlaceholder:(id)arg1 willInsertResult:(BOOL)arg2;
- (void)_finishedUsingDictationPlaceholder;
- (struct CGRect)frameForDictationResultPlaceholder:(id)arg1;
- (id)insertDictationResultPlaceholder;
- (BOOL)_dictationPlaceholderHasBeenRemoved;
- (BOOL)hasRangedSelection;
- (id)dictationResultMetadataForRange:(id)arg1;
- (id)metadataDictionariesForDictationResults;
- (void)insertDictationResult:(id)arg1 withCorrectionIdentifier:(id)arg2;
- (BOOL)isEditingSingleLineElement;
- (void)insertText:(id)arg1;
- (void)deleteBackward;
- (void)disableClearsOnInsertion;
- (void)deleteFromInput;
- (void)addInputString:(id)arg1;
- (void)addInputString:(id)arg1 fromVariantKey:(BOOL)arg2;
- (id)delegate;
- (void)setContinuousSpellCheckingEnabled:(BOOL)arg1;
- (void)_setParentTextView:(id)arg1;
- (id)_parentTextView;
- (id)undoManager;
- (id)undoManagerForWebView:(id)arg1;
- (void)_undoManagerDidRedo:(id)arg1;
- (void)_undoManagerDidUndo:(id)arg1;
- (void)setInteractionAssistantGestureRecognizers;
- (void)ensureSelection;
- (BOOL)clearWKFirstResponder;
- (BOOL)makeWKFirstResponder;
- (id)_responderForBecomeFirstResponder;
- (BOOL)resignFirstResponder;
- (void)deferredBecomeFirstResponder;
- (BOOL)becomeFirstResponder;
- (BOOL)canResignFirstResponder;
- (BOOL)canBecomeFirstResponder;
- (BOOL)updateKeyboardStateOnResponderChanges;
- (BOOL)isWidgetEditingView;
- (void)setIsWidgetEditingView:(BOOL)arg1;
- (id)standaloneEditingElement;
- (void)setStandaloneEditingElement:(id)arg1;
- (BOOL)isStandaloneEditableView;
- (void)setIsStandaloneEditableView:(BOOL)arg1;
- (id)textFormElement;
- (id)formElement;
- (void)_clearAllConsoleMessages;
- (void)_resetFormDataForFrame:(id)arg1;
- (void)assistFormNode:(id)arg1;
- (BOOL)doubleTapRectIsReplaced;
- (struct CGRect)doubleTapRect;
- (void)_handleTwoFingerDoubleTapAtLocation:(struct CGPoint)arg1;
- (void)_handleDoubleTapAtLocation:(struct CGPoint)arg1;
- (void)_handleDoubleTapAtPoint:(struct CGPoint)arg1 inWebHTMLView:(id)arg2 outRenderRect:(struct CGRect *)arg3;
@property(nonatomic, getter=isDoubleTapEnabled) BOOL doubleTapEnabled;
@property(nonatomic) BOOL mediaPlaybackAllowsAirPlay;
@property(nonatomic) BOOL shouldOnlyRecognizeGesturesOnActiveElements;
- (void)sendOrientationEventForOrientation:(int)arg1;
- (void)didRotateInteractionSheet;
- (void)willRotateInteractionSheet;
- (void)updateInteractionElements;
- (void)redrawScaledDocument;
- (void)_reshapePlugInViews;
- (id)checkSpellingOfString:(id)arg1;
- (void)_renderUnbufferedInContext:(struct CGContext *)arg1;
- (void)webViewDidDrawTiles:(id)arg1;
- (id)subviews;
- (BOOL)_shouldUpdateSubviewCachesForPlugins;
- (void)_updateSubviewCaches;
- (BOOL)_hasSubviewContainingWebContent:(id)arg1;
- (void)_overflowScrollView:(id)arg1 didEndScrollingForNode:(id)arg2;
- (void)_overflowScrollView:(id)arg1 scrollOffsetChangedForNode:(id)arg2 whileScrolling:(BOOL)arg3;
- (void)_overflowScrollView:(id)arg1 willStartScrollingForNode:(id)arg2;
- (void)webView:(id)arg1 willRemoveScrollingLayer:(id)arg2 withContentsLayer:(id)arg3 forNode:(id)arg4;
- (void)webView:(id)arg1 didCreateOrUpdateScrollingLayer:(id)arg2 withContentsLayer:(id)arg3 scrollSize:(id)arg4 forNode:(id)arg5 allowHorizontalScrollbar:(BOOL)arg6 allowVerticalScrollbar:(BOOL)arg7;
- (void)webViewDidCommitCompositingLayerChanges:(id)arg1;
- (void)_removeAdditionalSubview:(id)arg1;
- (void)_addAdditionalSubview:(id)arg1;
- (void)_setSubviewCachesNeedUpdate:(BOOL)arg1;
- (void)_noteOverflowScrollViewPendingDeletion:(id)arg1;
- (void)_noteOverflowScrollViewPendingInsertion:(id)arg1;
- (void)_webthread_webView:(id)arg1 attachRootLayer:(id)arg2;
- (void)revealedSelectionByScrollingWebFrame:(id)arg1;
- (BOOL)isUnperturbedDictationResultMarker:(id)arg1;
- (int)getPasteboardChangeCount;
- (id)readDataFromPasteboard:(id)arg1 withIndex:(int)arg2;
- (id)supportedPasteboardTypesForCurrentSelection;
- (id)_supportedPasteboardTypesForCurrentSelection;
- (BOOL)performsTwoStepPaste:(id)arg1;
- (BOOL)fragmentContainsRichContent:(id)arg1;
- (BOOL)hasRichlyEditableSelection;
- (BOOL)isInsideRichlyEditableTextWidget;
- (int)getPasteboardItemsCount;
- (void)writeDataToPasteboard:(id)arg1;
- (void)_updateFixedPositionContent;
- (struct CGRect)_adjustedLayoutRectForFixedPositionObjects;
- (void)_updateFixedPositionedObjectsLayoutRectUsingWebThread:(BOOL)arg1 synchronize:(BOOL)arg2;
- (struct CGRect)_layoutRectForFixedPositionObjects;
- (struct CGRect)_documentViewVisibleRect;
- (void)_notifyContentHostingLayersOfScaleChange;
- (void)_didMoveFromWindow:(id)arg1 toWindow:(id)arg2;
- (void)_notifyPlugInViewsOfScaleChange;
- (void)_notifyPlugInViewsOfDidZoom;
- (void)_notifyPlugInViewsOfDidEndZooming;
- (void)_notifyPlugInViewsOfWillBeginZooming;
- (BOOL)_isSubviewOfPlugInView:(id)arg1;
- (void)_didScroll;
- (void)_cancelLongPressGestureRecognizer;
- (void)setTilingArea:(int)arg1;
- (void)setIgnoresKeyEvents:(BOOL)arg1;
- (void)setIgnoresFocusingMouse:(BOOL)arg1;
- (BOOL)cancelTouchTracking;
- (BOOL)cancelMouseTracking;
- (struct CGImage *)newSnapshotWithRect:(struct CGRect)arg1;
- (struct CGImage *)createSnapshotWithRect:(struct CGRect)arg1;
- (void)setOpaque:(BOOL)arg1;
- (void)setDrawsBackground:(BOOL)arg1;
- (void)setSmoothsFonts:(BOOL)arg1;
- (void)layoutSubviews;
- (void)forceLayout;
- (void)_showPendingContentLayers;
- (BOOL)webView:(id)arg1 shouldScrollToPoint:(struct CGPoint)arg2 forFrame:(id)arg3;
- (void)webView:(id)arg1 restoreStateFromHistoryItem:(id)arg2 forFrame:(id)arg3 force:(BOOL)arg4;
- (void)webView:(id)arg1 saveStateToHistoryItem:(id)arg2 forFrame:(id)arg3;
- (void)saveStateToCurrentHistoryItem;
- (void)_saveStateToHistoryItem:(id)arg1;
- (void)_resetForNewPage;
- (void)_restoreScrollPointForce:(BOOL)arg1;
- (BOOL)updatesScrollView;
- (void)setUpdatesScrollView:(BOOL)arg1;
- (void)fileUploadPanelDidDismiss:(id)arg1;
- (void)setAllowsUserScaling:(BOOL)arg1 forDocumentTypes:(int)arg2;
- (void)setMaximumScale:(float)arg1 forDocumentTypes:(int)arg2;
- (void)setMinimumScale:(float)arg1 forDocumentTypes:(int)arg2;
- (void)setInitialScale:(float)arg1 forDocumentTypes:(int)arg2;
- (void)setViewportSize:(struct CGSize)arg1 forDocumentTypes:(int)arg2;
- (void)setMinimumSize:(struct CGSize)arg1 updateCurrentViewportConfigurationSize:(BOOL)arg2;
- (void)setMinimumSize:(struct CGSize)arg1;
- (void)setIgnoresViewportOverflowWhenAutoresizing:(BOOL)arg1;
- (void)setAutoresizes:(BOOL)arg1;
- (struct CGRect)documentBounds;
- (void)_WAKViewSizeDidChange:(id)arg1;
- (void)webView:(id)arg1 didReceiveDocTypeForFrame:(id)arg2;
- (void)webView:(id)arg1 didCommitLoadForFrame:(id)arg2;
- (void)webView:(id)arg1 didChangeLocationWithinPageForFrame:(id)arg2;
- (void)webView:(id)arg1 didFailLoadWithError:(id)arg2 forFrame:(id)arg3;
- (void)webView:(id)arg1 didFirstVisuallyNonEmptyLayoutInFrame:(id)arg2;
- (void)webViewDidRestoreFromPageCache:(id)arg1;
- (void)webView:(id)arg1 runOpenPanelForFileButtonWithResultListener:(id)arg2 allowMultipleFiles:(BOOL)arg3 acceptMIMETypes:(id)arg4;
- (void)webViewDidEndOverflowScroll:(id)arg1;
- (void)webViewDidStartOverflowScroll:(id)arg1;
- (void)_editableSelectionLayoutChangedByScrolling:(BOOL)arg1;
- (void)_selectionLayoutChangedByScrolling:(BOOL)arg1;
- (void)webThreadWebViewDidLayout:(id)arg1 byScrolling:(BOOL)arg2;
- (void)webView:(id)arg1 didFinishLoadForFrame:(id)arg2;
- (void)resetTilingAfterLoadComplete;
- (void)sendScrollEventIfNecessaryWasUserScroll:(BOOL)arg1;
- (void)sendScrollEventIfNecessary;
- (BOOL)needsScrollNotifications;
- (void)webView:(id)arg1 needsScrollNotifications:(id)arg2 forFrame:(id)arg3;
- (BOOL)isClassicViewportMode;
- (void)webView:(id)arg1 didReceiveViewportArguments:(id)arg2 forFrame:(id)arg3;
- (unsigned int)_applyViewportArguments:(id)arg1;
@property(nonatomic) BOOL shouldIgnoreCustomViewport;
- (void)_clearDoubleTapRect;
- (void)_updateSize;
@property(nonatomic) BOOL sizeUpdatesSuspended;
- (void)_setDocumentType:(int)arg1;
- (void)_setDocumentType:(int)arg1 overrideCustomConfigurations:(BOOL)arg2 viewportArguments:(id)arg3;
- (struct CGRect)convertRect:(struct CGRect)arg1 fromFrame:(id)arg2;
- (struct CGRect)convertRect:(struct CGRect)arg1 toFrame:(id)arg2;
- (struct CGPoint)convertPoint:(struct CGPoint)arg1 fromFrame:(id)arg2;
- (struct CGPoint)convertPoint:(struct CGPoint)arg1 toFrame:(id)arg2;
- (void)viewportConfigurationsDidChange:(unsigned int)arg1;
- (void)_updateScrollViewBoundaryZoomScales;
- (float)_zoomedDocumentScale;
- (float)minimumScale;
- (float)maximumScale;
- (float)initialScale;
- (float)minimumScaleForMinimumSize:(struct CGSize)arg1;
- (float)viewportHeight;
- (float)viewportWidth;
- (float)_documentScale;
- (void)_setDocumentScale:(float)arg1;
- (float)integralScaleForScale:(float)arg1;
- (float)integralScaleForScale:(float)arg1 keepingPointFixed:(struct CGPoint *)arg2;
- (void)setFrame:(struct CGRect)arg1;
- (void)setUsePreTimberlineTransparencyBehavior;
- (unsigned int)dataDetectorTypes;
- (void)setDataDetectorTypes:(unsigned int)arg1;
- (unsigned int)effectiveDataDetectorTypes;
- (BOOL)_dataDetectionIsActivated;
- (BOOL)detectsPhoneNumbers;
- (void)setDetectsPhoneNumbers:(BOOL)arg1;
- (void)setUserStyleSheet:(id)arg1;
- (id)_focusedOrMainFrame;
- (id)_groupName;
- (id)webView;
- (BOOL)loadsSynchronously;
- (void)setLoadsSynchronously:(BOOL)arg1;
- (void)loadData:(id)arg1 MIMEType:(id)arg2 textEncodingName:(id)arg3 baseURL:(id)arg4;
- (void)loadHTMLString:(id)arg1 baseURL:(id)arg2;
- (void)loadRequest:(id)arg1;
- (void)_cleanUpFrameStateAndLoad:(id)arg1;
- (void)_runLoadBlock:(id)arg1;
- (void)setDelegate:(id)arg1;
- (void)stopLoading:(id)arg1;
- (void)didMoveToSuperview;
- (void)willMoveToSuperview:(id)arg1;
- (void)_reachabilityManagerNotifiedIsReachable:(BOOL)arg1;
- (BOOL)hasDrawnTiles;
- (BOOL)didFirstVisuallyNonEmptyLayout;
- (void)dealloc;
- (void)setTypingAttributes:(id)arg1;
- (id)typingAttributes;
- (void)_setTextColor:(id)arg1;
- (void)_setFont:(id)arg1;
- (void)_dismissViewControllerAnimated:(BOOL)arg1 completion:(id)arg2;
- (BOOL)_presentViewController:(id)arg1 animated:(BOOL)arg2 completion:(id)arg3;
- (void)_removeShortcutController:(BOOL)arg1;
- (void)_removeDefinitionController:(BOOL)arg1;
- (void)_inspectorDidStopSearchingForNode:(id)arg1;
- (void)_inspectorDidStartSearchingForNode:(id)arg1;
- (void)_resetShowingTextStyle:(id)arg1;
- (void)enableReachability;
- (id)initWithWebView:(id)arg1 frame:(struct CGRect)arg2;
- (id)initWithFrame:(struct CGRect)arg1;
- (id)initSimpleHTMLDocumentWithStyle:(id)arg1 frame:(struct CGRect)arg2 preferences:(id)arg3 groupName:(id)arg4;
- (struct CGRect)webViewFrameForUIFrame:(struct CGRect)arg1;
- (void)_restoreViewportSettingsWithSize:(struct CGSize)arg1;
- (id)scriptingInfoWithChildren;
- (id)_scriptingInfoForForm:(id)arg1;
- (id)_scriptingInfoForLink:(id)arg1;
@property(getter=_acceptsFirstResponder, setter=_setAcceptsFirstResponder:) BOOL _acceptsFirstResponder;
- (id)_doubleTapGestureRecognizer;
- (id)superviewForSheet;
- (struct CGPoint)interactionLocation;
- (id)interactionElement;
- (void)setAllowsLinkSheet:(BOOL)arg1;
- (void)setAllowsDataDetectorsSheet:(BOOL)arg1;
- (void)setAllowsImageSheet:(BOOL)arg1;
- (id)interactionDelegate;
- (void)setInteractionDelegate:(id)arg1;
- (BOOL)supportsTwoFingerScrollingAtTouchLocation:(struct CGPoint)arg1 andLocation:(struct CGPoint)arg2;
- (void)sendScrollWheelEvents;
- (void)_cleanupSheet;
- (void)actionSheet:(id)arg1 didDismissWithButtonIndex:(int)arg2;
- (void)actionSheet:(id)arg1 clickedButtonAtIndex:(int)arg2;
- (id)_targetURL;
- (void)cancelInteractionWithImmediateDisplay:(BOOL)arg1;
- (void)deferInteraction;
- (void)cancelInteraction;
- (void)completeInteraction;
- (void)resetInteraction;
- (void)highlightApproximateNodeAndDisplayInfoSheet;
- (void)hideTapHighlight;
- (void)highlightApproximateNodeInverted:(BOOL)arg1;
- (id)deepestNodeAtViewportLocation:(struct CGPoint)arg1;
- (id)approximateNodeAtViewportLocation:(struct CGPoint *)arg1;
- (void)webViewDidPreventDefaultForEvent:(id)arg1;
- (void)webView:(id)arg1 didObserveDeferredContentChange:(int)arg2 forFrame:(id)arg3;
- (void)attemptClick:(id)arg1;
- (void)_sendMouseMoveAndAttemptClick:(id)arg1;
- (void)performClick:(id)arg1;
- (void)_twoFingerPanRecognized:(id)arg1;
- (void)_longPressRecognized:(id)arg1;
- (void)_highlightLongPressRecognized:(id)arg1;
- (BOOL)gestureRecognizerShouldBegin:(id)arg1;
- (SEL)_actionForLongPressOnElement:(id)arg1;
- (void)_twoFingerDoubleTapRecognized:(id)arg1;
- (void)_doubleTapRecognized:(id)arg1;
- (void)_singleTapRecognized:(id)arg1;
- (BOOL)gestureRecognizer:(id)arg1 shouldRecognizeSimultaneouslyWithGestureRecognizer:(id)arg2;
- (BOOL)gestureRecognizer:(id)arg1 canBePreventedByGestureRecognizer:(id)arg2;
- (BOOL)gestureRecognizer:(id)arg1 canPreventGestureRecognizer:(id)arg2;
- (BOOL)gestureRecognizer:(id)arg1 shouldReceiveTouch:(id)arg2;
- (void)installGestureRecognizers;
- (BOOL)willInteractWithLocation:(struct CGPoint)arg1;
- (BOOL)isInInteraction;
- (BOOL)startActionSheet;
- (void)validateInteractionWithLocation:(struct CGPoint)arg1;
- (void)tapInteractionWithLocation:(struct CGPoint)arg1;
- (void)continueInteractionWithLocation:(struct CGPoint)arg1;
- (void)startInteractionWithLocation:(struct CGPoint)arg1;
- (void)_resetInteractionWithLocation:(struct CGPoint)arg1;
- (void)performInteractionSelector:(SEL)arg1 afterDelay:(double)arg2;
- (void)clearInteractionTimer;
- (struct CGRect)presentationRectInHostViewForSheet:(id)arg1;
- (struct CGRect)initialPresentationRectInHostViewForSheet:(id)arg1;
- (id)hostViewForSheet:(id)arg1;
- (struct CGRect)_presentationRectForSheetGivenPoint:(struct CGPoint)arg1 inHostView:(id)arg2;
- (void)_showDataDetectorsSheet;
- (void)actionDidFinish;
- (void)_showLinkSheet;
- (void)_showImageSheet;
- (void)_createSheetWithElementActions:(id)arg1 showLinkTitle:(BOOL)arg2;
- (void)drawPage:(unsigned int)arg1 withPaginationInfo:(id)arg2;
- (void)_drawPDFPagesForPage:(unsigned int)arg1 withPaginationInfo:(id)arg2;
- (void)endPrintMode;
- (id)beginPrintModeForFrame:(id)arg1 withSize:(struct CGSize)arg2 startOffset:(float)arg3 minimumLayoutWidth:(float)arg4 maximumLayoutWidth:(float)arg5 tileClippedContent:(BOOL)arg6;
- (id)beginPrintModeWithSize:(struct CGSize)arg1 startOffset:(float)arg2 minimumLayoutWidth:(float)arg3 maximumLayoutWidth:(float)arg4 tileClippedContent:(BOOL)arg5;
- (id)beginPrintModeForFrame:(id)arg1 withWidth:(float)arg2 height:(float)arg3 startOffset:(float)arg4 shrinkToFit:(BOOL)arg5 tileClippedContent:(BOOL)arg6;
- (id)beginPrintModeWithWidth:(float)arg1 height:(float)arg2 startOffset:(float)arg3 shrinkToFit:(BOOL)arg4 tileClippedContent:(BOOL)arg5;
- (id)beginPrintModeWithWidth:(float)arg1 height:(float)arg2 startOffset:(float)arg3 shrinkToFit:(BOOL)arg4;
- (id)_beginPrintModeForPDFView:(id)arg1 withSize:(struct CGSize)arg2 startOffset:(float)arg3 minimumLayoutWidth:(float)arg4 maximumLayoutWidth:(float)arg5;
- (id)_beginPrintModeForHTMLView:(id)arg1 withSize:(struct CGSize)arg2 startOffset:(float)arg3 minimumLayoutWidth:(float)arg4 maximumLayoutWidth:(float)arg5 tileClippedContent:(BOOL)arg6;
- (BOOL)isInPrintMode;
- (struct CGPoint)constrainedPoint:(struct CGPoint)arg1;
- (BOOL)mouseEventsChangeSelection;
- (id)positionAtStartOrEndOfWord:(id)arg1;
- (id)asText;
- (struct CGRect)visibleBounds;
- (id)webVisiblePositionForPoint:(struct CGPoint)arg1;
- (void)setSelectionWithPoint:(struct CGPoint)arg1;
- (void)scrollSelectionToVisible:(BOOL)arg1;
- (void)cancelAutoscroll;
- (void)startAutoscroll:(struct CGPoint)arg1;
- (struct CGRect)contentFrameForView:(id)arg1;
@property(nonatomic) struct CGPoint autoscrollContentOffset;
- (BOOL)selectionIsCaretInDisplayBlockElementAtOffset:(int)arg1;
- (void)setSelectionToStart;
- (void)setSelectionToEnd;
- (void)setRangedSelectionWithExtentPoint:(struct CGPoint)arg1;
- (void)smartExtendRangedSelection:(int)arg1;
- (id)selectionRects;
- (id)selectionRectsForDOMRange:(id)arg1;
- (id)textInDOMRange:(id)arg1;
- (void)setSelectedDOMRange:(id)arg1 affinity:(int)arg2;
- (id)wordAtPoint:(struct CGPoint)arg1;
- (void)setSelectionWithFirstPoint:(struct CGPoint)arg1 secondPoint:(struct CGPoint)arg2;
- (void)setRangedSelectionExtentPoint:(struct CGPoint)arg1 baseIsStart:(BOOL)arg2 allowFlipping:(BOOL)arg3;
- (BOOL)setRangedSelectionExtentPoint:(struct CGPoint)arg1 baseIsStart:(BOOL)arg2;
- (void)setRangedSelectionInitialExtentToCurrentSelectionEnd;
- (void)setRangedSelectionInitialExtentToCurrentSelectionStart;
- (void)clearRangedSelectionInitialExtent;
- (void)setRangedSelectionBaseToCurrentSelectionEnd;
- (void)setRangedSelectionBaseToCurrentSelectionStart;
- (void)setRangedSelectionBaseToCurrentSelection;
- (void)setBaseWritingDirection:(int)arg1;
- (void)toggleBaseWritingDirection;
- (int)selectionBaseWritingDirection;
- (struct CGRect)caretRectForVisiblePosition:(id)arg1;
- (struct CGRect)caretRect;
- (struct UIEdgeInsets)caretInsets;
- (void)setCaretInsets:(struct UIEdgeInsets)arg1;
- (void)collapseSelection;
@property(readonly, nonatomic) int selectionState;
- (unsigned int)offsetInMarkedTextForSelection:(id)arg1;
- (struct CGRect)closestCaretRectInMarkedTextRangeForPoint:(struct CGPoint)arg1;
- (BOOL)hasMarkedText;
- (BOOL)hasEditableSelection;
- (void)clearSelection;
- (void)selectionChanged:(id)arg1;
- (void)selectionChanged;
- (struct CGPoint)convertPointToSelectedFrameCoordinates:(struct CGPoint)arg1;
- (struct CGRect)convertRectFromSelectedFrameCoordinates:(struct CGRect)arg1;
- (void)selectWord;
- (Class)_printFormatterClass;

// Remaining properties
@property(nonatomic) BOOL acceptsEmoji; // @dynamic acceptsEmoji;
@property(nonatomic) BOOL acceptsFloatingKeyboard;
@property(nonatomic) BOOL acceptsSplitKeyboard;
@property(nonatomic) int autocapitalizationType; // @dynamic autocapitalizationType;
@property(nonatomic) int autocorrectionType; // @dynamic autocorrectionType;
@property(nonatomic) BOOL contentsIsSingleValue; // @dynamic contentsIsSingleValue;
@property(nonatomic) BOOL deferBecomingResponder;
@property(nonatomic) BOOL displaySecureTextUsingPlainText;
@property(nonatomic) int emptyContentReturnKeyType;
@property(nonatomic) BOOL enablesReturnKeyAutomatically; // @dynamic enablesReturnKeyAutomatically;
@property(nonatomic) BOOL forceEnableDictation;
@property(retain, nonatomic) UIColor *insertionPointColor; // @dynamic insertionPointColor;
@property(nonatomic) unsigned int insertionPointWidth; // @dynamic insertionPointWidth;
@property(nonatomic) int keyboardAppearance; // @dynamic keyboardAppearance;
@property(nonatomic) int keyboardType; // @dynamic keyboardType;
@property(nonatomic) BOOL learnsCorrections;
@property(nonatomic) BOOL returnKeyGoesToNextResponder;
@property(nonatomic) int returnKeyType; // @dynamic returnKeyType;
@property(nonatomic, getter=isSecureTextEntry) BOOL secureTextEntry; // @dynamic secureTextEntry;
@property(retain, nonatomic) UIColor *selectionBarColor; // @dynamic selectionBarColor;
@property(retain, nonatomic) UIImage *selectionDragDotImage; // @dynamic selectionDragDotImage;
@property(retain, nonatomic) UIColor *selectionHighlightColor; // @dynamic selectionHighlightColor;
@property(nonatomic) int shortcutConversionType; // @dynamic shortcutConversionType;
@property(nonatomic) int spellCheckingType; // @dynamic spellCheckingType;
@property(nonatomic) BOOL suppressReturnKeyStyling;
@property(readonly, nonatomic) UIView *textInputView;
@property(nonatomic) int textLoupeVisibility; // @dynamic textLoupeVisibility;
@property(nonatomic) int textSelectionBehavior; // @dynamic textSelectionBehavior;
@property(nonatomic) id textSuggestionDelegate; // @dynamic textSuggestionDelegate;
@property(nonatomic) struct __CFCharacterSet *textTrimmingSet; // @dynamic textTrimmingSet;
@property(nonatomic) BOOL useInterfaceLanguageForLocalization;

@end

UIWebDocumentView和WebView一樣是個很大的類，單看它所遵守的協議那麼多也足以讓人吃一驚。先看看它重要的成員變量吧：

WKWindow是WAKWindow的C語言實現，類似的，WKView是WAKView的底層實現。WAKView的addSubview的操作實際對應了一個C函數
_WKViewAddSubview(WKView* aInstance)
暫未有空去確定C實現的原因，目前猜測是方便其它模塊用Core Foundation來實現吧。

這個他們的聲明：

struct WKView {
    struct _WKObject _field1;
    struct _WKViewContext *_field2;
    struct WKWindow *_field3;
    struct WKView *_field4;
    struct __CFArray *_field5;
    struct CGPoint _field6;
    struct CGRect _field7;
    unsigned int _field8;
    float _field9;
    void *_field10;
};

struct WKWindow {
    struct _WKObject _field1;
    id _field2;
    struct WKView *_field3;
    struct WKView *_field4;
    struct WKView *_field5;
};

WebViewReachabilityObserver這個類是用作監控網絡狀態的，如wifi已連接、網絡已斷開等狀態。

id _delegate會指向一個UIWebView對象，如後面提到的一些來自WebView的通知會通過_delegate再轉發給UIWebView。

int _orientation記錄了屏幕的方向

三個名字跟overflowScrollViews有關的NSMutableSet是用來保存UIWebOverflowScrollView的，當css屬性帶有-webkit-overflow-scrolling : touch時會用到這些東西。

NSArray *_additionalSubviews保存附件的view，除了上面的UIWebOverflowScrollView，還可以是視頻View（FigPluginView）。

幾個手勢識別器請參考《iOS私有API（三） UIWebView下的手勢識別器gestureRecognizer》

結構體_interaction把交互相關的成員變量放在了一起，每個變量都基本見名知意了。

兩個UIWebDocumentViewViewportConfiguration保存了默認和當前的viewport設置。

其他變量還有：fixed元素的位置偏移，document的scale，undoManager，檢查文字拼寫的UITextChecker，文件上傳面板以及很多聲明爲只用一個字節的狀態參數。

從函數名看：

• 應用顯示點擊高亮框的UIHighlightView
• 提供網頁內容選擇的接口來傳遞信息到WebView
• 提供UIWebTiledView需要的layerClass以及繪圖緩存IOSurface
• 把單擊、雙擊、縮放、鍵盤等事件傳遞到WebView
• 負責網頁輸入框的處理
• 接收WebView的回調通知，包括網頁已收到數據、完成排版、第一次繪製完畢等

總之，取名UIWeb“Document”View也有類似JavaScript中的document的意思，是操縱網頁的中樞。