label显示不同大小、颜色的富文本字符串

UILabel*l = [[UILabelalloc]initWithFrame:CGRectMake(20,400,200,30)];

//定义字符串NSMutableAttributedString类型可以方便改变特定的字符

NSMutableAttributedString*attributeString = [[NSMutableAttributedStringalloc]initWithString:@"This is xiaoming"];

//前2个文字是红色

[attributeStringaddAttributes:@{NSForegroundColorAttributeName:[UIColorredColor],NSFontAttributeName:[UIFontsystemFontOfSize:30]}range:NSMakeRange(0,1)];

[attributeStringaddAttributes:@{NSForegroundColorAttributeName:[UIColorgreenColor]}range:NSMakeRange(2,10)];

//设置属性文字

l.attributedText= attributeString;

[self.viewaddSubview:l];