UIButton dashed underline in Objective c

Question

Normal underline works but dotted undeline doesn't seems to work? ``` UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom]; btn.frame = CGRectMake(100, 10, 300, 300); NSMutableAttributedString *titleString = [[NSMutableAttributedString alloc] initWithString:@"Durga Vundavalli"]; // making text property to underline text- [titleString addAttribute:NSUnderlineStyleAttributeName value:[NSNumber numberWithInteger:NSUnderlineStyleSingle] range:NSMakeRange(0, [titleString length])]; // using text on button [btn setAttributedTitle: titleString forState:UIControlStateNormal]; [self.view addSubview:btn]; ``` The following was the enum from documentation: ``` typedef NS_ENUM(NSInteger, NSUnderlineStyle) { NSUnderlineStyleNone = 0x00, NSUnderlineStyleSingle = 0x01, NSUnderlineStyleThick NS_ENUM_AVAILABLE_IOS(7_0) = 0x02, NSUnderlineStyleDouble NS_ENUM_AVAILABLE_IOS(7_0) = 0x09, NSUnderlinePatternSolid NS_ENUM_AVAILABLE_IOS(7_0) = 0x0000, NSUnderlinePatternDot NS_ENUM_AVAILABLE_IOS(7_0) =…

Accepted Answer

You can't put only `NSUnderlinePatternDot`. What if you want 2 lines of dots? You have to use a `Pattern` and a `Style`.

```
[titleString addAttribute:NSUnderlineStyleAttributeName value:[NSNumber numberWithInteger:(NSUnderlinePatternDot|NSUnderlineStyleSingle)] range:NSMakeRange(0, [titleString length])];
```

You have to use a mask, as said by the doc:

Discussion The style, pattern, and optionally by-word mask are OR'd together to produce the value for `NSUnderlineStyleAttributeName` and `NSStrikethroughStyleAttributeName`.

UIButton dashed underline in Objective c

Solution

Problem