Question

我目前有一个应用程序，当用户点击按钮时，会在VC中添加一个视图，以显示视频（由用户拍摄）。按钮也会添加到视图中，当用户按下按钮时，应删除视图附带的所有视图。

如何删除视图？

目前我已经尝试过：

  self.view.superview?.removeFromSuperview()

这不起作用。

以下是所有相关代码：

  func newViewVideoPlayback(videoURL: URL!) {

    let newView = UIImageView(frame: camPreview.bounds)
    self.view.superview?.addSubview(newView)

    //cancelButton create dec 1
    let cancelButton = UIButton(frame: CGRect(x: 0, y: 589, width: 145, height: 78))
    cancelButton.setTitle("Cancel", for: .normal)
    cancelButton.addTarget(self, action: #selector(buttonAction), for: .touchUpInside)
    cancelButton.setTitleColor(.red, for: .normal)
    cancelButton.layer.cornerRadius = 8
    cancelButton.backgroundColor = .white

    self.view.superview?.addSubview(cancelButton) //maybe do newView, then subview

    playerItem1 = AVPlayerItem(url: videoURL as URL)
    playerQueue = AVQueuePlayer(playerItem: playerItem1)
    playerLayer = AVPlayerLayer(player: playerQueue)
    playerLooper = AVPlayerLooper(player: playerQueue, templateItem: playerItem1)

    playerLayer.frame = newView.bounds //shud it be view.bounds
    playerLayer.videoGravity = AVLayerVideoGravity.resizeAspectFill
    newView.layoutIfNeeded() //same as other view comment

    newView.layer.insertSublayer(playerLayer, at: 0)

    //newView.superview?.bringSubview(toFront: newView)
    self.playerQueue?.play()

}

按钮：

    @objc func buttonAction(sender: UIButton!) {
    print("Button tapped")
    //for cancelButon
    //playerQueue = nil
    self.view.superview?.removeFromSuperview()
}

在添加视频网址的方法中调用了func

Answer 1

您可能想做的是从ViewController中删除newView，而不是view的{{1}}。

为superview创建一个全局变量：

newView

...然后像这样分配class YourViewController: UIViewController { var newView: UIImageView? ...：

newView

...，当您需要删除此视图时，只需调用以下内容：

func newViewVideoPlayback(videoURL: URL!) {

    newView = UIImageView(frame: camPreview.bounds)
    ...

您的按钮操作应如下所示：

newView?.removeFromSuperview()

Swift：如何从VC中删除视图？

1 个答案: