同一个UILabel不同的字体颜色

NSMutableAttributedString *attriStr = [[NSMutableAttributedString alloc] initWithString:str];
    [attriStr addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:NSMakeRange(str.length-1,1)];
    [attriStr addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:14] range:NSMakeRange(str.length-1,1)];
    cell.price.attributedText = attriStr;