Вы можете попробовать вот так, изменив UIImage кнопки:
@IBAction func mr(_ sender: Any) {
mrOutlet.setImage(UIImage(named: "check"), for: .normal)
msOutlet.setImage(UIImage(named: "uncheck"), for: .normal)
mrsOutlet.setImage(UIImage(named: "uncheck"), for: .normal)
salutation = "Mr."
}
@IBAction func ms(_ sender: Any) {
msOutlet.setImage(UIImage(named: "check"), for: .normal)
mrOutlet.setImage(UIImage(named: "uncheck"), for: .normal)
mrsOutlet.setImage(UIImage(named: "uncheck"), for: .normal)
salutation = "Ms."
}
@IBAction func mrs(_ sender: Any) {
mrsOutlet.setImage(UIImage(named: "check"), for: .normal)
mrOutlet.setImage(UIImage(named: "uncheck"), for: .normal)
msOutlet.setImage(UIImage(named: "uncheck"), for: .normal)
salutation = "Mrs."
}
Надеюсь, эта помощь:)