问如何在iOS应用程序中使用屏幕镜像

EN

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view.

    let routePickerView = AVRoutePickerView(frame: CGRect(x: 0.0, y: 30.0, width: 30.0, height: 30.0))
    routePickerView.backgroundColor = UIColor.lightGray
    self.view.addSubview(routePickerView)

    let avAsset = AVAsset(url: URL(string: "https://sample-videos.com/video123/mp4/720/big_buck_bunny_720p_1mb.mp4")!)
    let avPlayerItem = AVPlayerItem(asset: avAsset)
    let avPlayer = AVPlayer(playerItem: avPlayerItem)
    let avPlayerLayer = AVPlayerLayer(player: avPlayer)
    avPlayerLayer.frame = CGRect(x: 0.0, y: 40.0, width: self.view.frame.size.width, height: self.view.frame.size.height - 40.0)
    self.view.layer.addSublayer(avPlayerLayer)
    avPlayer.seek(to: CMTime.zero)
    avPlayer.play()
}