富文本的各种操作

NSMutableAttributedString *abs = [[NSMutableAttributedString alloc]initWithString:@"ABCDEFGHIGKLMN北京上海帝都魔都端午端午吃粽子"];

[abs beginEditing];

//字体大小

[abs addAttribute:NSFontAttributeName

value:[UIFont systemFontOfSize:20.0]

range:NSMakeRange(0, 2)];

//字体颜色

[abs addAttribute:NSForegroundColorAttributeName

value:[UIColor blueColor]

range:NSMakeRange(2, 2)];

//下划线

[abs addAttribute:NSUnderlineStyleAttributeName

value:@(NSUnderlineStyleSingle)

range:NSMakeRange(3, 7)];

//字体的设置

[abs addAttribute:NSFontAttributeName

value:[UIFont fontWithName:@"AppleGothic" size:24]

range:NSMakeRange(2, 6)];

//删除线

[abs addAttribute:NSStrikethroughStyleAttributeName value:@(NSUnderlinePatternSolid | NSUnderlineStyleSingle) range:NSMakeRange(10, 7)];

//删除线的颜色依附于删除线

[abs addAttribute:NSStrikethroughColorAttributeName value:[UIColor redColor] range:NSMakeRange(10, 7)];

//_showLabel 是之前定义好的UILabel

_showLabel.attributedText = abs;

_showLabel.numberOfLines = 0