uibutton - 以编程方式向 UIButton 添加目标操作

Question

我测试了大量样本，但没有一个对我有用。这是我的代码:

override func viewDidLoad() {
    super.viewDidLoad()

    let button = UIButton(frame: CGRect(x: 100, y: 100, width: 200, height: 50))
    button.backgroundColor = .green
    button.setTitle("Test Button", for: .normal)
    button.titleLabel?.sizeToFit()
    button.addTarget(self, action: #selector(ViewController.buttonTapped(_:)), for: .touchUpInside)

    self.view.addSubview(button)
}

func buttonTapped(_ sender: UIButton) {
    print("Button tapped.")
}

我错过了什么？

Answer 1

嗯，关注 this answer问题出在 .touchUpInside .在 tvOS 中它应该是 .primaryActionTriggered .

button.addTarget(self, action: #selector(ViewController.buttonTapped(_:)), for: .primaryActionTriggered)