Swift 从 collection 视图切换视频时，播放器冻结但音频仍在后台播放

Question

这里是我的意思的快速视频：https://youtu.be/Ld8apahZBIg

我有一个 collection 视图，当我单击任何第一个视频播放时，它会完美显示。当我单击返回关闭 player/view 以播放不同的视频时，音频在后台运行，但播放视频时视频显示似乎冻结。

这是 UICollectionView 的相关代码：

class HomeController: UICollectionViewController, UICollectionViewDelegateFlowLayout {

       override func viewDidLoad() {
    super.viewDidLoad()
         collectionView?.register(HomePostCell.self, forCellWithReuseIdentifier: cellId)

    collectionView?.register(HomeControllerHeader.self, forSupplementaryViewOfKind: UICollectionElementKindSectionHeader, withReuseIdentifier: "HomeControllerHeaderId")
   }

override func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
    return posts.count
}

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumInteritemSpacingForSectionAt section: Int) -> CGFloat {
    return 1
}

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat {
    return 1
}

override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: cellId, for: indexPath) as! HomePostCell
    //        self.hpc = cell
    cell.post = posts[indexPath.item]
    return cell
} 

var avPlayerViewController = VideoPlayerViewController()

var avPlayer = AVPlayer()
var playerLayer: AVPlayerLayer!

override func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
    let links = posts[indexPath.row]
    guard let url = NSURL(string: links.videoUrl) else { return }
    var player = avPlayerViewController.player
    player = AVPlayer(url: url as URL)
    let playerItem = AVPlayerItem(url: url as URL)
    avPlayer.replaceCurrentItem(with: playerItem)
    let playerController = avPlayerViewController
    playerController.player = player

self.navigationController?.pushViewController(playerController, animated: true)
        playerController.player.play()

      }
}

这是我的 avPlayer 视图控制器的相关代码 class:

class VideoPlayerViewController: UIViewController {
    var player: AVPlayer!
    var playerLayer: AVPlayerLayer!

    let videoView: UIView = {
       let vidView = UIView()
       return vidView
    }()

    override func viewDidLoad() {
        super.viewDidLoad()

        playerLayer = AVPlayerLayer(player: player)

        videoView.layer.addSublayer(playerLayer)

        view.addSubview(videoView)

        videoView.anchor(top: view.topAnchor, left: view.leftAnchor, bottom: view.bottomAnchor, right: view.rightAnchor, paddingTop: 0, paddingLeft: 0, paddingBottom: 0, paddingRight: 0, width: 0, height: 0)
    }

    override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(true)
        playerLayer.frame = view.bounds
        self.view.layer.addSublayer(playerLayer)
        player!.play()
    }

    override func viewDidLayoutSubviews() {
        super.viewDidLayoutSubviews()
        playerLayer.frame = view.bounds
    }

    override func viewDidDisappear(_ animated: Bool) {
        player!.pause()
        player = nil
        playerLayer.removeFromSuperlayer()
    }
}

如果您还有其他问题，请告诉我。

Answer 1

已修复。问题是我正在调用播放器来显示一次视频。每次我尝试删除子层并播放新视频时，视频播放器都会冻结，因为播放器层只会加载一次，然后当尝试播放新播放器层时它不会因为它需要再次加载.每次显示视图控制器时，我都使用 viewDidAppear 加载内容。

class VideoPlayerViewController: UIViewController {


var hc: HomeController!
var player: AVPlayer!
var playerLayer: AVPlayerLayer!

let videoView: UIView = {
   let vidView = UIView()
   return vidView
}()

override func viewDidLoad() {
    super.viewDidLoad()
    view.backgroundColor = .black
}

override func viewDidAppear(_ animated: Bool) {
    super.viewDidAppear(true)
    playerLayer = AVPlayerLayer(player: player)
    view.addSubview(videoView)
    videoView.anchor(top: view.topAnchor, left: view.leftAnchor, bottom: view.bottomAnchor, right: view.rightAnchor, paddingTop: 0, paddingLeft: 0, paddingBottom: 0, paddingRight: 0, width: 0, height: 0)
    self.view.layer.addSublayer(playerLayer)
    playerLayer.frame = view.bounds
    player!.play()
}

override func viewDidDisappear(_ animated: Bool) {
    player!.pause()
    player = nil
    playerLayer.removeFromSuperlayer()
}

}

Swift 从 collection 视图切换视频时，播放器冻结但音频仍在后台播放

Swift player freezes but audio still works in background when switching videos from collection view

ios

swift

uicollectionview

avplayer