How to underline part of string with NSAttributedString objective-c

Question

Underling a string only works when the range starts from zero. If i start it at 1 then it works. The green colour works regardless.

+ (NSAttributedString*)returnNSAttributedString:(NSString*)string range:(NSRange)range WithColour:(UIColor*)colour WithUnderLine:(BOOL)underline {
    NSMutableAttributedString *attributedString =
    [[NSMutableAttributedString alloc] initWithString:string];
    if (underline) {
        [attributedString addAttributes:@{NSUnderlineStyleAttributeName: @(NSUnderlineStyleSingle)} range:range];
    }
    [attributedString addAttribute:NSForegroundColorAttributeName value:colour range:range];
    [attributedString addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:NSRangeFromString(string)];
    return attributedString;
}

it works on iOS 7 not iOS 8.

Answer 1

You can use the NSUnderlineStyleAttributeName and NSUnderlineColorAttributeName attributes. You can use it like this:

NSRange foundRange = [wordString rangeOfString:@"Base Mix"];
if (foundRange.location != NSNotFound)
{
    [wordString beginEditing];
    [wordString addAttribute:NSUnderlineStyleAttributeName value:[NSNumber numberWithInt:1] range:foundRange];
    [wordString addAttribute:NSUnderlineColorAttributeName value:[NSColor redColor] range:foundRange];
    [wordString endEditing];
}