UILabel的屬性總結

#import "ViewController.h"
#import <CoreText/CoreText.h>

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    //學習內容
    /*
     1.控件 UIView UILabel UITextField UITextView UIButton
     2.字體、大小、單位、顏色
     */
    UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(10, 30, 300, 260)];
    label.text = @"Label Text Content, This is a text label things attribute";//默認爲空
    label.font = [UIFont systemFontOfSize:17];//默認使用系統的17
    label.textColor = [UIColor orangeColor];//默認使用文本黑色
    label.shadowColor = [UIColor lightGrayColor];//默認沒有陰影
    label.shadowOffset = CGSizeMake(1,0);//默認是一個向上的陰影(0,-1)
    label.textAlignment = NSTextAlignmentCenter;//默認是左對齊
    label.lineBreakMode = NSLineBreakByTruncatingTail;//段落樣式，默認是最後截斷尾巴，用...代替

    //富文本的基本數據類型，屬性字符串。以此爲基礎，如果這個設置了相應的屬性，則會忽略上面設置的屬性，默認爲空
    NSString *string = label.text;
    const CGFloat fontSize = 16.0;
    NSMutableAttributedString *attrString = [[NSMutableAttributedString alloc] initWithString:string];
    NSUInteger length = [string length];
    //設置字體
    UIFont *baseFont = [UIFont systemFontOfSize:fontSize];
    [attrString addAttribute:NSFontAttributeName value:baseFont range:NSMakeRange(0, length)];//設置所有的字體
    UIFont *boldFont = [UIFont boldSystemFontOfSize:fontSize];
    [attrString addAttribute:NSFontAttributeName value:boldFont range:[string rangeOfString:@"Text"]];//設置Text這四個字母的字體爲粗體
    //設置傾斜，需要導入coreText
    UIFont *italicFont = GetVariationOfFontWithTrait(baseFont,
                                                     kCTFontTraitItalic);
    [attrString addAttribute:NSFontAttributeName value:italicFont
                       range:[string rangeOfString:@"Label"]];
    // 設置顏色
    UIColor *color = [UIColor redColor];
    [attrString addAttribute:NSForegroundColorAttributeName
                       value:color
                       range:[string rangeOfString:@"Content"]];
    [attrString addAttribute:NSBackgroundColorAttributeName value:[UIColor blueColor] range:[string rangeOfString:@"ent"]];

    //可以對這些屬性設置值
    //字體名稱有以下：
//    label.font = [UIFont fontWithName:@"Arial-BoldItalicMT" size:24];
    [attrString addAttribute:NSFontAttributeName value:[UIFont fontWithName:@"Verdana-BoldItalic" size:18] range:[string rangeOfString:@"Label"]];
    label.numberOfLines = 2;
    NSMutableParagraphStyle *
    style = [[NSParagraphStyle defaultParagraphStyle] mutableCopy];
    style.lineSpacing = 10;//增加行高
    style.headIndent = 10;//頭部縮進，相當於左padding
    style.tailIndent = -10;//相當於右padding
    style.lineHeightMultiple = 1.5;//行間距是多少倍
    style.alignment = NSTextAlignmentLeft;//對齊方式
    style.firstLineHeadIndent = 20;//首行頭縮進
    style.paragraphSpacing = 10;//段落後面的間距
    style.paragraphSpacingBefore = 20;//段落之前的間距
    [attrString addAttribute:NSParagraphStyleAttributeName value:style range:NSMakeRange(0, length)];

    [attrString addAttribute:NSKernAttributeName value:@2 range:NSMakeRange(0, length)];//字符間距 2pt
    [attrString addAttribute:NSStrokeColorAttributeName value:[UIColor blueColor] range:[string rangeOfString:@"is"]];//設置文字描邊顏色，需要和NSStrokeWidthAttributeName設置描邊寬度，這樣就能使文字空心
    [attrString addAttribute:NSStrokeWidthAttributeName value:@2 range:[string rangeOfString:@"is"]];//空心字，文字邊框描述
    [attrString addAttribute:NSUnderlineStyleAttributeName value:@(NSUnderlineStyleSingle) range:[string rangeOfString:@"text"]];//下劃線
    [attrString addAttribute:NSUnderlineStyleAttributeName value:@(NSUnderlineStyleThick) range:[string rangeOfString:@"label"]];//厚的下劃線
    [attrString addAttribute:NSStrikethroughStyleAttributeName value:@(NSUnderlinePatternSolid | NSUnderlineStyleSingle) range:[string rangeOfString:@"things"]];//刪除線
    [attrString addAttribute:NSStrikethroughColorAttributeName value:[UIColor blueColor] range:[string rangeOfString:@"things"]];//刪除線藍色
   label.attributedText = attrString;

    label.highlightedTextColor = [UIColor redColor];//設置文本高亮顯示顏色，與highlighted一起使用。
    label.highlighted = NO; //高亮狀態是否打開
    label.enabled = YES;//設置文字內容是否可變
    label.userInteractionEnabled = YES;//設置標籤是否忽略或移除用戶交互。默認爲NO
    label.baselineAdjustment = UIBaselineAdjustmentNone;//如果adjustsFontSizeToFitWidth屬性設置爲YES，這個屬性就來控制文本基線的行爲。
//    UIBaselineAdjustmentAlignBaselines=0，默認，文本最上端與中線對齊。
//    UIBaselineAdjustmentAlignCenters,   文本中線與label中線對齊。
//    UIBaselineAdjustmentNone,  文本最低端與label中線對齊。;
    [self.view addSubview:label];

    /*
     字體名如下：
     Font Family: American Typewriter
     Font: AmericanTypewriter
     Font: AmericanTypewriter-Bold

     Font Family: AppleGothic
     Font: AppleGothic

     Font Family: Arial
     Font: ArialMT
     Font: Arial-BoldMT
     Font: Arial-BoldItalicMT
     Font: Arial-ItalicMT

     Font Family: Arial Rounded MT Bold
     Font: ArialRoundedMTBold

     Font Family: Arial Unicode MS
     Font: ArialUnicodeMS

     Font Family: Courier
     Font: Courier
     Font: Courier-BoldOblique
     Font: Courier-Oblique
     Font: Courier-Bold

     Font Family: Courier New
     Font: CourierNewPS-BoldMT
     Font: CourierNewPS-ItalicMT
     Font: CourierNewPS-BoldItalicMT
     Font: CourierNewPSMT

     Font Family: DB LCD Temp
     Font: DBLCDTempBlack

     Font Family: Georgia
     Font: Georgia-Bold
     Font: Georgia
     Font: Georgia-BoldItalic
     Font: Georgia-Italic

     Font Family: Helvetica
     Font: Helvetica-Oblique
     Font: Helvetica-BoldOblique
     Font: Helvetica
     Font: Helvetica-Bold

     Font Family: Helvetica Neue
     Font: HelveticaNeue
     Font: HelveticaNeue-Bold

     Font Family: Hiragino Kaku Gothic **** W3
     Font: HiraKakuProN-W3

     Font Family: Hiragino Kaku Gothic **** W6
     Font: HiraKakuProN-W6

     Font Family: Marker Felt
     Font: MarkerFelt-Thin

     Font Family: STHeiti J
     Font: STHeitiJ-Medium
     Font: STHeitiJ-Light

     Font Family: STHeiti K
     Font: STHeitiK-Medium
     Font: STHeitiK-Light

     Font Family: STHeiti SC
     Font: STHeitiSC-Medium
     Font: STHeitiSC-Light

     Font Family: STHeiti TC
     Font: STHeitiTC-Light
     Font: STHeitiTC-Medium

     Font Family: Times New Roman
     Font: TimesNewRomanPSMT
     Font: TimesNewRomanPS-BoldMT
     Font: TimesNewRomanPS-BoldItalicMT
     Font: TimesNewRomanPS-ItalicMT

     Font Family: Trebuchet MS
     Font: TrebuchetMS-Italic
     Font: TrebuchetMS
     Font: Trebuchet-BoldItalic
     Font: TrebuchetMS-Bold

     Font Family: Verdana
     Font: Verdana-Bold
     Font: Verdana-BoldItalic
     Font: Verdana
     Font: Verdana-Italic

     Font Family: Zapfino
     Font: Zapfino
     */

    //文本對齊方式
    /* Values for NSTextAlignment */
    /*
    NSTextAlignmentLeft 左對齊
    NSTextAlignmentCenter 劇中對齊
    NSTextAlignmentRight 右對齊
    NSTextAlignmentJustified 兩端對齊
    NSTextAlignmentNatural 根據顯示的文字特性對齊
    */

    //段落樣式
    /*
    lineSpacing;                         來增加行距
    paragraphSpacing;
    alignment;                           對齊
    firstLineHeadIndent;                 段落開始的縮排像素
    headIndent;                          可調整全部文字的縮排距離，可當作左邊 padding 使用
    tailIndent;                          可調整文字尾端的縮排距離。需要注意的是，這裏指定的值可以當作文字顯示的寬、而也可當作右邊 padding 使用，依據輸入的正負值而定：
    lineBreakMode;
    minimumLineHeight;
    maximumLineHeight;        而針對不同的字型與字號，我們可以透過指定最大與最小行距（maximumLineHeight 與 minimumLineHeight）來避免過高或過窄的狀況發生。
    baseWritingDirection;
    lineHeightMultiple;                  想要調整行距，可以透過搭配使用 lineHeightMultiple 更改行距倍數
    paragraphSpacingBefore; 而若是文章內容有分段落的話，也可以透過指定段落結尾距離（paragraphSpacing）以及段落開頭距離（paragraphSpacingBefore）:
    hyphenationFactor;
        @property(readwrite,copy,NS_NONATOMIC_IOSONLY) NSArray *tabStops NS_AVAILABLE_IOS(7_0);
        @property(readwrite,NS_NONATOMIC_IOSONLY) CGFloat defaultTabInterval NS_AVAILABLE_IOS(7_0);
     */

    /* Predefined character attributes for text. If the key is not in the dictionary, then use the default values as described below.  //預定義的文本屬性值，如果鍵不是一個字典，那麼使用默認的值作爲以下描述
     NSFontAttributeName 字體 默認是Helvetica 12號
     NSParagraphStyleAttributeName 段落樣式
     */
    /*
    UIKIT_EXTERN NSString *const  NS_AVAILABLE_IOS(6_0);      // NSParagraphStyle, default defaultParagraphStyle
    UIKIT_EXTERN NSString *const NSForegroundColorAttributeName NS_AVAILABLE_IOS(6_0);     // UIColor, default blackColor
    UIKIT_EXTERN NSString *const NSBackgroundColorAttributeName NS_AVAILABLE_IOS(6_0);     // UIColor, default nil: no background
    UIKIT_EXTERN NSString *const NSLigatureAttributeName NS_AVAILABLE_IOS(6_0);            // NSNumber containing integer, default 1: default ligatures, 0: no ligatures
    UIKIT_EXTERN NSString *const NSKernAttributeName NS_AVAILABLE_IOS(6_0);                // NSNumber containing floating point value, in points; amount to modify default kerning. 0 means kerning is disabled. (note: values other than nil and 0 are unsupported on iOS)
    UIKIT_EXTERN NSString *const NSStrikethroughStyleAttributeName NS_AVAILABLE_IOS(6_0);  // NSNumber containing integer, default 0: no strikethrough
    UIKIT_EXTERN NSString *const NSUnderlineStyleAttributeName NS_AVAILABLE_IOS(6_0);      // NSNumber containing integer, default 0: no underline
    UIKIT_EXTERN NSString *const NSStrokeColorAttributeName NS_AVAILABLE_IOS(6_0);         // UIColor, default nil: same as foreground color
    UIKIT_EXTERN NSString *const NSStrokeWidthAttributeName NS_AVAILABLE_IOS(6_0);         // NSNumber containing floating point value, in percent of font point size, default 0: no stroke; positive for stroke alone, negative for stroke and fill (a typical value for outlined text would be 3.0)
    UIKIT_EXTERN NSString *const NSShadowAttributeName NS_AVAILABLE_IOS(6_0);              // NSShadow, default nil: no shadow
    UIKIT_EXTERN NSString *const NSTextEffectAttributeName NS_AVAILABLE_IOS(7_0);          // NSString, default nil: no text effect

    UIKIT_EXTERN NSString *const NSAttachmentAttributeName NS_AVAILABLE_IOS(7_0);          // NSTextAttachment, default nil
    UIKIT_EXTERN NSString *const NSLinkAttributeName NS_AVAILABLE_IOS(7_0);                // NSURL (preferred) or NSString
    UIKIT_EXTERN NSString *const NSBaselineOffsetAttributeName NS_AVAILABLE_IOS(7_0);      // NSNumber containing floating point value, in points; offset from baseline, default 0
    UIKIT_EXTERN NSString *const NSUnderlineColorAttributeName NS_AVAILABLE_IOS(7_0);      // UIColor, default nil: same as foreground color
    UIKIT_EXTERN NSString *const NSStrikethroughColorAttributeName NS_AVAILABLE_IOS(7_0);  // UIColor, default nil: same as foreground color
    UIKIT_EXTERN NSString *const NSObliquenessAttributeName NS_AVAILABLE_IOS(7_0);         // NSNumber containing floating point value; skew to be applied to glyphs, default 0: no skew
    UIKIT_EXTERN NSString *const NSExpansionAttributeName NS_AVAILABLE_IOS(7_0);           // NSNumber containing floating point value; log of expansion factor to be applied to glyphs, default 0: no expansion

    UIKIT_EXTERN NSString *const NSWritingDirectionAttributeName NS_AVAILABLE_IOS(7_0);    // NSArray of NSNumbers representing the nested levels of writing direction overrides as defined by Unicode LRE, RLE, LRO, and RLO characters.  The control characters can be obtained by masking NSWritingDirection and NSTextWritingDirection values.  LRE: NSWritingDirectionLeftToRight|NSTextWritingDirectionEmbedding, RLE: NSWritingDirectionRightToLeft|NSTextWritingDirectionEmbedding, LRO: NSWritingDirectionLeftToRight|NSTextWritingDirectionOverride, RLO: NSWritingDirectionRightToLeft|NSTextWritingDirectionOverride,

    UIKIT_EXTERN NSString *const NSVerticalGlyphFormAttributeName NS_AVAILABLE_IOS(6_0);   // An NSNumber containing an integer value.  0 means horizontal text.  1 indicates vertical text.  If not specified, it could follow higher-level vertical orientation settings.  Currently on iOS, it's always horizontal.  The behavior for any other value is undefined.
     */

    // NSParagraphStyle  段落樣式
//    typedef NS_ENUM(NSInteger, NSLineBreakMode) {     /* What to do with long lines */ //對於長內容或多行內容的處理方式
//        NSLineBreakByWordWrapping = 0,        /* Wrap at word boundaries, default */   //按包含單詞爲界限截斷
//        NSLineBreakByCharWrapping,        /* Wrap at character boundaries */           //按字符爲界限截斷
//        NSLineBreakByClipping,        /* Simply clip */                                //簡單的修剪
//        NSLineBreakByTruncatingHead,  /* Truncate at head of line: "...wxyz" */        //截斷頭部
//        NSLineBreakByTruncatingTail,  /* Truncate at tail of line: "abcd..." */        //截斷尾巴
//        NSLineBreakByTruncatingMiddle /* Truncate middle of line:  "ab...yz" */        //截斷中間
//    } NS_ENUM_AVAILABLE_IOS(6_0);
}
//獲取斜體
UIFont * GetVariationOfFontWithTrait(UIFont *baseFont,
                                     CTFontSymbolicTraits trait) {
    CGFloat fontSize = [baseFont pointSize];
    CFStringRef
    baseFontName = (__bridge CFStringRef)[baseFont fontName];
    CTFontRef baseCTFont = CTFontCreateWithName(baseFontName,
                                                fontSize, NULL);
    CTFontRef ctFont =
    CTFontCreateCopyWithSymbolicTraits(baseCTFont, 0, NULL,
                                       trait, trait);
    NSString *variantFontName =
    CFBridgingRelease(CTFontCopyName(ctFont,
                                     kCTFontPostScriptNameKey));

    UIFont *variantFont = [UIFont fontWithName:variantFontName
                                          size:fontSize];
    CFRelease(ctFont);
    CFRelease(baseCTFont);
    return variantFont;
};


- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end