NSMutableAttributedString

+(NSMutableAttributedString *)mutableString:(NSString *)objString{

NSString *string =[NSString
stringWithFormat:@"所在温区 %@",objString];

NSMutableAttributedString *attributedString = [[NSMutableAttributedString
alloc] initWithString:string];

// 设置富文本样式
[attributedString addAttribute:NSForegroundColorAttributeName
value:RGBBLUE
range:NSMakeRange(4, string.length)];

[attributedString addAttribute:NSFontAttributeName
value:YAHEI(18)
range:NSMakeRange(0,
4)];
[attributedString addAttribute:NSFontAttributeName
value:YAHEI(18)
range:NSMakeRange(5, string.length)];

return attributedString;
}

NSMutableAttributedString 的具体使用方法，设置label 用过label的AttributedString 来设置