Underline button text in Swift

Question

I have UIButton. In interface builder I set its title to be 'Attributed'. How can I make its title to be underlined from code in Swift?

@IBOutlet weak var myBtn: UIButton! 

I created a function called on the touchUpInside event of this button:

var attributedString = NSMutableAttributedString(string:"new text")     var attrs = [         NSFontAttributeName : UIFont.systemFontOfSize(19.0),         NSForegroundColorAttributeName : UIColor.redColor()     ]     var gString = NSMutableAttributedString(string:"g", attributes:attrs)     attributedString.appendAttributedString(gString)      myBtn.titleLabel?.attributedText = attributedString; 

But still no result. Also I need to know how to access the underline attribute. Text, size and color stay the same.

Answer 1

Swift 5 / Xcode 12/13

  @IBOutlet weak var myButton: UIButton!       let yourAttributes: [NSAttributedString.Key: Any] = [       .font: UIFont.systemFont(ofSize: 14),       .foregroundColor: UIColor.blue,       .underlineStyle: NSUnderlineStyle.single.rawValue   ] // .double.rawValue, .thick.rawValue                override func viewDidLoad() {      super.viewDidLoad()           let attributeString = NSMutableAttributedString(         string: "Your button text",         attributes: yourAttributes      )      myButton.setAttributedTitle(attributeString, for: .normal)   } 

Swift 4 / Xcode 9

  @IBOutlet weak var myButton: UIButton!       let yourAttributes: [NSAttributedStringKey: Any] = [       NSAttributedStringKey.font: UIFont.systemFont(ofSize: 14),       NSAttributedStringKey.foregroundColor: UIColor.blue,       NSAttributedStringKey.underlineStyle: NSUnderlineStyle.styleSingle.rawValue   ] // .styleDouble.rawValue, .styleThick.rawValue, .styleNone.rawValue                   override func viewDidLoad() {     super.viewDidLoad()          let attributeString = NSMutableAttributedString(       string: "Your button text",       attributes: yourAttributes     )     myButton.setAttributedTitle(attributeString, for: .normal)   } 

Swift 3 / Xcode 8

  @IBOutlet weak var myButton: UIButton!    let yourAttributes: [String: Any] = [       NSFontAttributeName: UIFont.systemFont(ofSize: 14),       NSForegroundColorAttributeName: UIColor.white,       NSUnderlineStyleAttributeName: NSUnderlineStyle.styleSingle.rawValue   ] // .styleDouble.rawValue, .styleThick.rawValue, .styleNone.rawValue                  override func viewDidLoad() {       super.viewDidLoad()        let attributeString = NSMutableAttributedString(         string: "Your button text",         attributes: yourAttributes       )               myButton.setAttributedTitle(attributeString, for: .normal)      }