iOS 富文本属性解释

 NSFontAttributeName://(字体)

 NSBackgroundColorAttributeName://(字体背景色)

 NSForegroundColorAttributeName://(字体颜色)

 NSParagraphStyleAttributeName://(段落) 

 NSLigatureAttributeName://(连字符) 

 NSKernAttributeName://(字间距) 

 NSStrikethroughStyleAttributeName://NSUnderlinePatternSolid(实线) | NSUnderlineStyleSingle(删除线) 

 NSUnderlineStyleAttributeName://(下划线)

NSLinkAttributeName //链接

//段落属性

 //段落属性
   NSMutableParagraphStyle *paragraphStyle = labelDic[NSParagraphStyleAttributeName];
   if (!paragraphStyle || nil == paragraphStyle) {
       paragraphStyle = [[NSParagraphStyle defaultParagraphStyle] mutableCopy];
       paragraphStyle.lineSpacing = 0.0;//增加行高
       paragraphStyle.headIndent = 0;//头部缩进，相当于左padding
       paragraphStyle.tailIndent = 0;//相当于右padding
       paragraphStyle.lineHeightMultiple = 0;//行间距是多少倍
       paragraphStyle.alignment = NSTextAlignmentLeft;//对齐方式
       paragraphStyle.firstLineHeadIndent = 0;//首行头缩进
       paragraphStyle.paragraphSpacing = 0;//段落后面的间距
       paragraphStyle.paragraphSpacingBefore = 0;//段落之前的间距
       [atrString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:range];
   }