UIButton Or UILabel with underlined text. iOS 6 or iOS 7

//Button

NSMutableAttributedString *commentString = [[NSMutableAttributedString alloc] initWithString:@"ADD ANOTHER CONTACT"];

[commentString addAttribute:NSUnderlineStyleAttributeName value:[NSNumber numberWithInteger:NSUnderlineStyleSingle] range:NSMakeRange(0, [commentString length])];

// Or for adding Colored text use----------

    UIColor* textColor = [UIColor blueColor];

    [commentString setAttributes:@{NSForegroundColorAttributeName:textColor,NSUnderlineStyleAttributeName:[NSNumber numberWithInteger:NSUnderlineStyleSingle]} range:NSMakeRange(0,[commentString length])];

// Or for adding Colored text use----------

    [_addContactButton setAttributedTitle:commentString forState:UIControlStateNormal];

//Label

 NSMutableAttributedString *commentString = [[NSMutableAttributedString alloc] initWithString:@"ADD ANOTHER CONTACT"];

    

  UIColor* textColor = [UIColor blueColor];

    

[commentString setAttributes:@{NSForegroundColorAttributeName:textColor,NSUnderlineStyleAttributeName:[NSNumber numberWithInteger:NSUnderlineStyleSingle]} range:NSMakeRange(0,[commentString length])];

    

 [self.label setAttributedText:commentString];