在實際的應(yīng)用開發(fā)中經(jīng)常需要使用到富文本，這里總結(jié)經(jīng)常使用到的富文本屬性方便學(xué)習(xí)與記憶

• NSFontAttributeName：指定字體大小，默認是12point；UIFont
  代碼實例:
  NSMutableAttributedString *originString = [[NSMutableAttributedString alloc] initWithString:@"默認字體樣式\n" attributes:nil]; //增加NSFontAttributeName屬性設(shè)置字體大小為18 NSAttributedString *fontAttributeStr = [[NSAttributedString alloc] initWithString:@"帶有NSFontAttributeName樣式的字體\n" attributes:@{NSFontAttributeName:[UIFont systemFontOfSize:18]}]; [originString appendAttributedString:fontAttributeStr];

• NSForegroundColorAttributeName:指定字體顏色，默認是黑色；UIColor
  代碼實例：
  //增加NSForegroundColorAttributeName屬性設(shè)置字體顏色為紅色 NSAttributedString *textColorAttributeStr = [[NSAttributedString alloc] initWithString:@"帶有NSForegroundColorAttributeName樣式的字體\n" attributes:@{NSForegroundColorAttributeName:[UIColor redColor]}]; [originString appendAttributedString:textColorAttributeStr];

• NSBackgroundColorAttributeName：指定字體背景顏色；UIColor
  代碼實例：
  NSAttributedString *backColorAttributeStr = [[NSAttributedString alloc] initWithString:@"帶有NSBackgroundColorAttributeName樣式的字體\n" attributes:@{NSBackgroundColorAttributeName:[UIColor redColor]}]; [originString appendAttributedString:backColorAttributeStr];

• NSLigatureAttributeName：連體字符設(shè)置，沒用過暫時；NSNumber

• NSKernAttributeName：設(shè)置字體間距；NSNumber
  代碼實例：
  NSAttributedString *textSpaceAttributeStr = [[NSAttributedString alloc] initWithString:@"帶有NSKernAttributeName樣式的字體\n" attributes:@{NSKernAttributeName:@3}]; [originString appendAttributedString:textSpaceAttributeStr];

• NSStrikethroughStyleAttributeName：設(shè)置刪除線樣式，其取值如下：NSNumber

代碼實例：
NSAttributedString *deleteAttributeStr = [[NSAttributedString alloc] initWithString:@"帶有NSStrikethroughStyleAttributeName樣式的字體\n" attributes:@{NSStrikethroughStyleAttributeName:@(NSUnderlineStyleThick),NSStrikethroughColorAttributeName:[UIColor redColor]}]; [originString appendAttributedString:deleteAttributeStr];

• NSStrikethroughColorAttributeName：設(shè)置刪除線的顏色；UIColor
• NSUnderlineStyleAttributeName ** 和 NSUnderlineColorAttributeName：設(shè)置下劃線和下劃線的顏色；NSNumber** && UIColor下劃線樣式取值與NSStrikethroughStyleAttributeName使用相同的枚舉；
• NSStrokeWidthAttributeName 和 NSStrokeColorAttributeName ：字體描邊以及描邊顏色的設(shè)置；NSNumber && UIColor
  代碼實例：
  //設(shè)置字體描邊以及描邊顏色 NSAttributedString *strokeAttributeStr = [[NSAttributedString alloc] initWithString:@"帶有NSStrokeWidthAttributeName樣式的字體\n" attributes:@{NSStrokeWidthAttributeName:@1,NSStrokeColorAttributeName:[UIColor redColor],NSFontAttributeName:[UIFont systemFontOfSize:18 weight:UIFontWeightBold]}]; [originString appendAttributedString:strokeAttributeStr];
• NSShadowAttributeName：設(shè)置文字陰影； NSShadow
  代碼實例：
  //設(shè)置文字陰影，使用NSShadow NSShadow *shadow = [[NSShadow alloc] init]; shadow.shadowBlurRadius = 3.0f; //模糊 shadow.shadowColor = [UIColor redColor];//顏色 shadow.shadowOffset = CGSizeMake(1, 5); NSAttributedString *shadowAttributeStr = [[NSAttributedString alloc] initWithString:@"帶有NSShadowAttributeName樣式的字體\n" attributes:@{NSFontAttributeName:[UIFont systemFontOfSize:18],NSShadowAttributeName:shadow}]; [originString appendAttributedString:shadowAttributeStr];
• NSBaselineOffsetAttributeName：設(shè)置文字基于準(zhǔn)線上下偏移，其值為正數(shù)時上移，反之下移 NSNumber
  代碼實例：
  //設(shè)置文字偏移 NSAttributedString *baselineOffsetAttributeStr = [[NSAttributedString alloc] initWithString:@"帶有NSBaselineOffsetAttributeName樣式的字體\n" attributes:@{NSBaselineOffsetAttributeName:@5}]; //方便對比加入正常的字符串 [originString appendAttributedString:[[NSAttributedString alloc] initWithString:@"沒有設(shè)置偏移的" attributes:nil]]; [originString appendAttributedString:baselineOffsetAttributeStr];
• NSWritingDirectionAttributeName：設(shè)置文字書寫方向 NSArray of NSNumber
  代碼實例：
  //設(shè)置文字書寫方向：NSWritingDirectionAttributeName NSAttributedString *directionAttributeStr = [[NSAttributedString alloc] initWithString:@"帶有NSWritingDirectionAttributeName樣式的字體\n" attributes:@{NSWritingDirectionAttributeName:@[@3]}]; [originString appendAttributedString:directionAttributeStr];
• NSLinkAttributeName：設(shè)置點擊文字的跳轉(zhuǎn)鏈接，需要使用UITextView并實現(xiàn)其代理方法shouldInteractWithURL NSURL or NSString
  代碼實例：
  //設(shè)置點擊跳轉(zhuǎn)鏈接：NSLinkAttributeName NSAttributedString *linkAttributeStr = [[NSAttributedString alloc] initWithString:@"帶有NSLinkAttributeName樣式的字體\n" attributes:@{NSLinkAttributeName:@"https://www.baidu.com"}]; [originString appendAttributedString:linkAttributeStr];
• NSTextAttachment：文本附件，常被用來實現(xiàn)圖文混排 NSTextAttachment
  代碼實例：
  //圖文混排 NSTextAttachment *attachment = [[NSTextAttachment alloc] init]; attachment.image = [UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:@"http://upload.jianshu.io/users/upload_avatars/2115199/148387f72be4.jpg?imageMogr/thumbnail/240x240/quality/100"]]]; attachment.bounds = CGRectMake(0, 0, 30, 30); NSAttributedString *attachmentImg = [NSAttributedString attributedStringWithAttachment:attachment]; NSAttributedString *attachmentAttributeStr = [[NSAttributedString alloc] initWithString:@"帶有NSTextAttachment樣式的字體\n" attributes:nil]; [originString appendAttributedString:attachmentImg]; [originString appendAttributedString:attachmentAttributeStr];

以上所有樣式的效果圖如下：

Normal.png