单选单选按钮

Question

所以我有 3 个按钮

override func viewDidLoad() {
    super.viewDidLoad()

    weeklyRadioButton.setImage(UIImage(named: "a"), for: .normal)
    weeklyRadioButton.setImage(UIImage(named: "b"), for: .selected)

    biWeeklyRadioButton.setImage(UIImage(named: "a"), for: .normal)
    biWeeklyRadioButton.setImage(UIImage(named: "b"), for: .selected)

    noThanksRadioButton.setImage(UIImage(named: "a"), for: .normal)
    noThanksRadioButton.setImage(UIImage(named: "b"), for: .selected)
}

@IBAction func biWeeklyRadioButtonTapped(_ sender: UIButton) {
    sender.isSelected = !sender.isSelected
    weeklyRadioButton.setImage(UIImage(named: "a"), for: .normal) . 
    // its not changing then image of the button.
    noThanksRadioButton.setImage(UIImage(named: "a"), for: .normal)
}

以及其他两个按钮的类似两个操作。

当前代码允许多选按钮。 我想知道在按钮中实现单选的方法。

假设我选择了按钮 1 在选择按钮 2 时，按钮 1 被取消选择

Answer 1

试试下面的代码。另请注意，所有按钮插座都应连接到以下操作方法。

@IBAction func anyRadioButtonTapped(_ sender: UIButton) {

    //Reset all of them first
    weeklyRadioButton.isSelected = false
    biWeeklyRadioButton.isSelected = false
    noThanksRadioButton.isSelected = false

    //Highlight associate button
    sender.isSelected = !sender.isSelected
}