UILabel: Custom underline color?

Question

I need the text of a UILabel to be black, but have a light gray underline under the text. Is this possible with NSAttributedString or TTTAttr

Answer 1

// Print `str` in black, and underline the word STRING in gray.
NSMutableAttributedString *str = [[NSMutableAttributedString alloc]initWithString:@"This is my STRING"];
[str addAttribute:NSForegroundColorAttributeName value:[UIColor blackColor] range:NSMakeRange(0, str.length-7)];
[str addAttribute:NSUnderlineColorAttributeName value:[UIColor grayColor] range:NSMakeRange([str length]-6, 6)];
[str addAttribute:NSUnderlineStyleAttributeName value:[NSNumber numberWithInt:NSUnderlineStyleSingle] range:NSMakeRange([str length]-6, 6)];

_label.attributedText = str; // assuming you have an iVar name `label`