ios - Swift 5 无法向自定义按钮添加操作(AVPlayerViewController 中的 addTarget 问题)

Question

我已经尝试了所有教程，但我总是无法向以编程方式添加的按钮添加操作。

我已经尝试将函数添加到 viewdidload 和 viewdidappear 但它不起作用。

class videoPlayer: AVPlayerViewController {
// PROPERTIES
let button = UIButton()
.
.
.
override func viewDidLoad() {
        super.viewDidLoad()
        print("video controller here!")

        //Play the Video
        let url = Bundle.main.path(forResource: "v1", ofType: "mp4")!
        let player = AVPlayer(url: URL(fileURLWithPath: url))
        let playerViewController = AVPlayerViewController()
        playerViewController.player = player
        self.present(playerViewController, animated: true) {
            playerViewController.player!.play()
            playerViewController.showsPlaybackControls = false
        }


        //ADDING CUSTOM UI
        button.setTitle("TEST", for: UIControl.State.normal)
        button.backgroundColor = UIColor.red
        button.sizeToFit()
        button.addTarget(self, action: #selector(self.buttonAction(sender: )), for: .touchUpInside)
        playerViewController.contentOverlayView?.addSubview(button)

    }

    // MARK :- Functions
    @objc func buttonAction(sender :UIButton) {
        print("Button tapped")
    }
.
.
.
}

左上角确实出现了一个红色按钮，但点击后没有任何反应。

Answer 1

尝试像这样设置一个框架

button.frame = CGRect(x:20,y:20,width:50,height:50)