ios-NSMutableAttributedString 更改文本字符串颜色、大小

    NSString * string = [NSString stringWithFormat:@"您的号码是%@号",[self backString:dic[@"rankNumber"]]];
    NSString * rankNumber = [NSString stringWithFormat:@"%@",[self backString:dic[@"rankNumber"]]];
    NSMutableAttributedString *str = [[NSMutableAttributedString alloc] initWithString:string];
    [str addAttribute:NSForegroundColorAttributeName value:YellowColor range:NSMakeRange(5,rankNumber.length)];//(5,2) 2是位数
    [str addAttribute:NSFontAttributeName value:[UIFont fontWithName:@"HelveticaNeue" size:FontOfSize19*kWidth] range:NSMakeRange(5, rankNumber.length)];
    _orderNumber.attributedText = str;

    NSString * string1 = [NSString stringWithFormat:@"您前面还有%@位司机在等待",[self backString:dic[@"frontNumber"]]];
    NSString * frontNumber = [NSString stringWithFormat:@"%@",[self backString:dic[@"frontNumber"]]];
    NSMutableAttributedString *str1 = [[NSMutableAttributedString alloc] initWithString:string1];
    [str1 addAttribute:NSForegroundColorAttributeName value:YellowColor range:NSMakeRange(5,frontNumber.length)];//(5,2) 2是位数
    [str1 addAttribute:NSFontAttributeName value:[UIFont fontWithName:@"HelveticaNeue" size:FontOfSize19*kWidth] range:NSMakeRange(5, frontNumber.length)];
    _waitNumber.attributedText = str1;
    NSString * number = [NSString stringWithFormat:@"待运单%@",[self backString:dic[@"orderNumber"]]];
    _waitOrder.text = number;