TTTAtibutedlabel

NSString *rateStr = [NSString stringWithFormat:@"七日年化 %.2f%%",info.rate];
    [self.rateLabel setText:rateStr afterInheritingLabelAttributesAndConfiguringWithBlock:
     ^NSMutableAttributedString *(NSMutableAttributedString *mutableAttributedString) {
         [mutableAttributedString addAttribute:(NSString *)kCTForegroundColorAttributeName value:(id)[UIColor blueColor] range:NSMakeRange(0, 4)]; //loc + length
         [mutableAttributedString addAttribute:(NSString *)kCTForegroundColorAttributeName value:(id)[UIColor redColor] range:NSMakeRange(4, rateStr.length-4)];
        [mutableAttributedString addAttribute:NSFontAttributeName value:[UIFont fontWithName:@"HelveticaNeue" size:17.0] range:NSMakeRange(4, rateStr.length-4)];
         return mutableAttributedString;
     }];