案例1：修改文本字体大小、颜色属性
比如文本展示为姓名和性别，但是我们不能排除姓名会很长，所以此刻的lable宽度我们就不能写死，换句话说lable的宽度根据文本的内容来定
我经常用两种方式解决：
1.前面文章已经涉及：lable自适应http://blog.csdn.net/tuwanli125/article/details/51003798
2.就是使用NSMutableAttributedString属性给infoL设置文本
NSString *infoStr = [NSStringstringWithFormat:@"%@ %@",name,sex];
NSMutableAttributedString *infoAttStr = [[NSMutableAttributedStringalloc] initWithString:infoStr];
NSArray *colorArr [email protected][[UIColorcolorWithRed:0/255.0green:168/255.0blue:255/255.0alpha:1.0],[UIColorcolorWithRed:153/255.0green:153/255.0blue:153/255.0alpha:1.0]];
－－－－－－－－修改姓名的颜色，字体大小－－－－－－
[infoAttStr addAttribute:NSForegroundColorAttributeNamevalue:colorArr[0]range:NSMakeRange(0,name.length)];
[infoAttStr addAttribute:NSFontAttributeNamevalue:[UIFontsystemFontOfSize:15]range:NSMakeRange(0,name.length)];
－－－－－－－－修改性别的颜色，字体大小－－－－－－
[infoAttStr addAttribute:NSFontAttributeNamevalue:[UIFontsystemFontOfSize:12]range:NSMakeRange(name.length+1,sexStr.length)];
[infoAttStr addAttribute:NSForegroundColorAttributeNamevalue:colorArr[1]range:NSMakeRange(name.length+1,sexStr.length)];
[self.infoL setAttributedText:infoAttStr];
这样一个文本就可以了，简单快捷
案例2：文本行间距
remindLabel.text = @""(一堆文字，此处省略一万字
)
NSMutableAttributedString *attributedString = [[NSMutableAttributedStringalloc]initWithString:remindLabel.text];;
NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStylealloc]init];
[paragraphStyle setLineSpacing:9];
paragraphStyle.maximumLineHeight = 60; //最大的行高
[paragraphStyle setFirstLineHeadIndent:30];//首行缩进
[attributedString addAttribute:NSParagraphStyleAttributeNamevalue:paragraphStylerange:NSMakeRange(0, remindLabel.text.length)];
remindLabel.attributedText = attributedString;
案例3：添加下划线
我给按钮添加下滑线，比如按钮显示文本为电话号码，点击就可以拨打电话
NSMutableAttributedString *str = [[NSMutableAttributedStringalloc]initWithString:_phoneBtn.titleLabel.text];
NSRange strRange = {0,[strlength]};
[str addAttribute:NSUnderlineStyleAttributeNamevalue:[NSNumbernumberWithInteger:NSUnderlineStyleSingle]range:strRange];
[_phoneBtnsetAttributedTitle:strforState:UIControlStateNormal]