EGOTableViewPullRefresh是一個在ios下實現表格下拉刷新和上拉刷新的功能組件。
在ios6下,使用的非常好,iso到7後,在計算視圖大小時候考慮 UIRectEage,於是乎這個pulltableview就有點問題,具體表現在頭部會升上去,被狀態欄和導航欄遮住,因爲在ios6下座標0就是在導航欄下面,但是在ios7除非self.edgesForExtendedLayout = UIRectEdgeNone;
否則座標0就是從屏幕最上面開始算的。
有2種解決辦法:
1.在ios7和8下面,指定UIViewController不計算邊角,加以下代碼就可:
self.edgesForExtendedLayout = UIRectEdgeNone;
2.修改EGORefreshTableHeaderView。
思路就是保存一個初始化默認高度defaultHeight,第一次調用的時候取出來保存一下,這個值在ios6和設置UIRectEdgeNone情況下是0,否則是64,然後下啦的時候,以前是直接加PULL_AREA_HEIGHT,現在還需要加個defaultHeight,同理減去也是這個值,判斷座標時也要考慮這個值,然後就能完美適應ios6、7、8情況了。
代碼:
// // EGORefreshTableHeaderView.m // Demo // // Created by Devin Doty on 10/14/09October14. // Copyright 2009 enormego. All rights reserved. // // Permission is hereby granted, free of charge, to any person obtaining a copy // of this software and associated documentation files (the "Software"), to deal // in the Software without restriction, including without limitation the rights // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell // copies of the Software, and to permit persons to whom the Software is // furnished to do so, subject to the following conditions: // // The above copyright notice and this permission notice shall be included in // all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN // THE SOFTWARE. // #import "EGORefreshTableHeaderView.h" @interface EGORefreshTableHeaderView (Private) - (void)setState:(EGOPullState)aState; @end @implementation EGORefreshTableHeaderView @synthesize delegate=_delegate; - (id)initWithFrame:(CGRect)frame { if (self = [super initWithFrame:frame]) { isLoading = NO; CGFloat midY = frame.size.height - PULL_AREA_HEIGTH/2; /* Config Last Updated Label */ UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0.0f, midY, self.frame.size.width, 20.0f)]; label.autoresizingMask = UIViewAutoresizingFlexibleWidth; label.font = [UIFont systemFontOfSize:12.0f]; label.shadowOffset = CGSizeMake(0.0f, 1.0f); label.backgroundColor = [UIColor clearColor]; label.textAlignment = UITextAlignmentCenter; [self addSubview:label]; _lastUpdatedLabel=label; /* Config Status Updated Label */ label = [[UILabel alloc] initWithFrame:CGRectMake(0.0f, midY - 18, self.frame.size.width, 20.0f)]; label.autoresizingMask = UIViewAutoresizingFlexibleWidth; label.font = [UIFont boldSystemFontOfSize:13.0f]; label.shadowOffset = CGSizeMake(0.0f, 1.0f); label.backgroundColor = [UIColor clearColor]; label.textAlignment = UITextAlignmentCenter; [self addSubview:label]; _statusLabel=label; /* Config Arrow Image */ CALayer *layer = [[CALayer alloc] init]; layer.frame = CGRectMake(25.0f,midY - 35, 30.0f, 55.0f); layer.contentsGravity = kCAGravityResizeAspect; #if __IPHONE_OS_VERSION_MAX_ALLOWED >= 40000 if ([[UIScreen mainScreen] respondsToSelector:@selector(scale)]) { layer.contentsScale = [[UIScreen mainScreen] scale]; } #endif [[self layer] addSublayer:layer]; _arrowImage=layer; /* Config activity indicator */ UIActivityIndicatorView *view = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:DEFAULT_ACTIVITY_INDICATOR_STYLE]; view.frame = CGRectMake(25.0f,midY - 8, 20.0f, 20.0f); [self addSubview:view]; _activityView = view; [self setState:EGOOPullNormal]; /* Configure the default colors and arrow image */ [self setBackgroundColor:nil textColor:nil arrowImage:nil]; scrollViewDefaultTop = -1; } return self; } #pragma mark - #pragma mark Setters #define aMinute 60 #define anHour 3600 #define aDay 86400 - (void)refreshLastUpdatedDate { NSDate * date = nil; if ([_delegate respondsToSelector:@selector(egoRefreshTableHeaderDataSourceLastUpdated:)]) { date = [_delegate egoRefreshTableHeaderDataSourceLastUpdated:self]; } if(date) { NSTimeInterval timeSinceLastUpdate = [date timeIntervalSinceNow]; NSInteger timeToDisplay = 0; timeSinceLastUpdate *= -1; if(timeSinceLastUpdate < anHour) { timeToDisplay = (NSInteger) (timeSinceLastUpdate / aMinute); if(timeToDisplay == /* Singular*/ 1) { _lastUpdatedLabel.text = [NSString stringWithFormat:NSLocalizedStringFromTable(@"Updated %ld minute ago",@"PullTableViewLan",@"Last uppdate in minutes singular"),(long)timeToDisplay]; } else { /* Plural */ _lastUpdatedLabel.text = [NSString stringWithFormat:NSLocalizedStringFromTable(@"Updated %ld minutes ago",@"PullTableViewLan",@"Last uppdate in minutes plural"), (long)timeToDisplay]; } } else if (timeSinceLastUpdate < aDay) { timeToDisplay = (NSInteger) (timeSinceLastUpdate / anHour); if(timeToDisplay == /* Singular*/ 1) { _lastUpdatedLabel.text = [NSString stringWithFormat:NSLocalizedStringFromTable(@"Updated %ld hour ago",@"PullTableViewLan",@"Last uppdate in hours singular"), (long)timeToDisplay]; } else { /* Plural */ _lastUpdatedLabel.text = [NSString stringWithFormat:NSLocalizedStringFromTable(@"Updated %ld hours ago",@"PullTableViewLan",@"Last uppdate in hours plural"), (long)timeToDisplay]; } } else { timeToDisplay = (NSInteger) (timeSinceLastUpdate / aDay); if(timeToDisplay == /* Singular*/ 1) { _lastUpdatedLabel.text = [NSString stringWithFormat:NSLocalizedStringFromTable(@"Updated %ld day ago",@"PullTableViewLan",@"Last uppdate in days singular"), (long)timeToDisplay]; } else { /* Plural */ _lastUpdatedLabel.text = [NSString stringWithFormat:NSLocalizedStringFromTable(@"Updated %ld days ago",@"PullTableViewLan",@"Last uppdate in days plural"), (long)timeToDisplay]; } } } else { _lastUpdatedLabel.text = nil; } // Center the status label if the lastupdate is not available CGFloat midY = self.frame.size.height - PULL_AREA_HEIGTH/2; if(!_lastUpdatedLabel.text) { _statusLabel.frame = CGRectMake(0.0f, midY - 8, self.frame.size.width, 20.0f); } else { _statusLabel.frame = CGRectMake(0.0f, midY - 18, self.frame.size.width, 20.0f); } } - (void)setState:(EGOPullState)aState{ switch (aState) { case EGOOPullPulling: _statusLabel.text = NSLocalizedStringFromTable(@"Release to refresh...",@"PullTableViewLan", @"Release to refresh status"); [CATransaction begin]; [CATransaction setAnimationDuration:FLIP_ANIMATION_DURATION]; _arrowImage.transform = CATransform3DMakeRotation((M_PI / 180.0) * 180.0f, 0.0f, 0.0f, 1.0f); [CATransaction commit]; break; case EGOOPullNormal: if (_state == EGOOPullPulling) { [CATransaction begin]; [CATransaction setAnimationDuration:FLIP_ANIMATION_DURATION]; _arrowImage.transform = CATransform3DIdentity; [CATransaction commit]; } _statusLabel.text = NSLocalizedStringFromTable(@"Pull down to refresh...",@"PullTableViewLan", @"Pull down to refresh status"); [_activityView stopAnimating]; [CATransaction begin]; [CATransaction setValue:(id)kCFBooleanTrue forKey:kCATransactionDisableActions]; _arrowImage.hidden = NO; _arrowImage.transform = CATransform3DIdentity; [CATransaction commit]; [self refreshLastUpdatedDate]; break; case EGOOPullLoading: _statusLabel.text = NSLocalizedStringFromTable(@"Loading...",@"PullTableViewLan", @"Loading Status"); [_activityView startAnimating]; [CATransaction begin]; [CATransaction setValue:(id)kCFBooleanTrue forKey:kCATransactionDisableActions]; _arrowImage.hidden = YES; [CATransaction commit]; break; default: break; } _state = aState; } - (void)setBackgroundColor:(UIColor *)backgroundColor textColor:(UIColor *) textColor arrowImage:(UIImage *) arrowImage { self.backgroundColor = backgroundColor? backgroundColor : DEFAULT_BACKGROUND_COLOR; if(textColor) { _lastUpdatedLabel.textColor = textColor; _statusLabel.textColor = textColor; } else { _lastUpdatedLabel.textColor = DEFAULT_TEXT_COLOR; _statusLabel.textColor = DEFAULT_TEXT_COLOR; } _lastUpdatedLabel.shadowColor = [_lastUpdatedLabel.textColor colorWithAlphaComponent:0.1f]; _statusLabel.shadowColor = [_statusLabel.textColor colorWithAlphaComponent:0.1f]; _arrowImage.contents = (id)(arrowImage? arrowImage.CGImage : DEFAULT_ARROW_IMAGE.CGImage); } #pragma mark - #pragma mark ScrollView Methods - (void)egoRefreshScrollViewDidScroll:(UIScrollView *)scrollView { if (_state == EGOOPullLoading) { CGFloat offset = MAX(scrollView.contentOffset.y * -1, 0); offset = MIN(offset, PULL_AREA_HEIGTH); UIEdgeInsets currentInsets = scrollView.contentInset; if(offset > currentInsets.top)//xf currentInsets.top = offset; scrollView.contentInset = currentInsets; } else if (scrollView.isDragging) { NSLog(@"%f",scrollView.contentOffset.y); if (_state == EGOOPullPulling && scrollView.contentOffset.y > -(PULL_TRIGGER_HEIGHT+scrollViewDefaultTop) && scrollView.contentOffset.y < 0.0f && !isLoading) { [self setState:EGOOPullNormal]; } else if (_state == EGOOPullNormal && scrollView.contentOffset.y < -(PULL_TRIGGER_HEIGHT+scrollViewDefaultTop) && !isLoading) { [self setState:EGOOPullPulling]; } if (scrollView.contentInset.top != scrollViewDefaultTop) {//xf !=0 UIEdgeInsets currentInsets = scrollView.contentInset; currentInsets.top -= PULL_AREA_HEIGTH;//xf scrollView.contentInset = currentInsets; } } } - (void)startAnimatingWithScrollView:(UIScrollView *) scrollView { isLoading = YES; [self setState:EGOOPullLoading]; [UIView beginAnimations:nil context:NULL]; [UIView setAnimationDuration:0.2]; UIEdgeInsets currentInsets = scrollView.contentInset; if(scrollViewDefaultTop == -1){//xf scrollViewDefaultTop = currentInsets.top; } currentInsets.top += PULL_AREA_HEIGTH;//xf scrollView.contentInset = currentInsets; [UIView commitAnimations]; if(scrollView.contentOffset.y == 0){ [scrollView setContentOffset:CGPointMake(scrollView.contentOffset.x, -PULL_TRIGGER_HEIGHT) animated:YES]; } } - (void)egoRefreshScrollViewDidEndDragging:(UIScrollView *)scrollView { if (scrollView.contentOffset.y <= - (PULL_TRIGGER_HEIGHT+scrollViewDefaultTop) && !isLoading) { if ([_delegate respondsToSelector:@selector(egoRefreshTableHeaderDidTriggerRefresh:)]) { [_delegate egoRefreshTableHeaderDidTriggerRefresh:self]; } [self startAnimatingWithScrollView:scrollView]; } } - (void)egoRefreshScrollViewDataSourceDidFinishedLoading:(UIScrollView *)scrollView { isLoading = NO; [UIView beginAnimations:nil context:NULL]; [UIView setAnimationDuration:.2]; UIEdgeInsets currentInsets = scrollView.contentInset; currentInsets.top -= PULL_AREA_HEIGTH;//xf scrollView.contentInset = currentInsets; [UIView commitAnimations]; [self setState:EGOOPullNormal]; } - (void)egoRefreshScrollViewWillBeginDragging:(UIScrollView *)scrollView { [self refreshLastUpdatedDate]; } #pragma mark - #pragma mark Dealloc - (void)dealloc { _delegate=nil; [_activityView release]; [_statusLabel release]; [_arrowImage release]; [_lastUpdatedLabel release]; [super dealloc]; } @end