ios - 为什么画中画在iOS启动片刻后立即停止？

Question

当我从我的自定义视频播放器启动画中画时，pip 启动了片刻然后失败。我在调试控制台中发现了如下错误日志:

PGPictureInPictureProxy (0x12710a280) _updateAutoPIPSettingsAndNotifyRemoteObjectWithReason:] - Acquiring remote object proxy for connection <NSXPCConnection: 0x2825a32a0> connection to service with pid 63 named com.apple.pegasus failed with error: Error Domain=NSCocoaErrorDomain Code=4099 "The connection to service with pid 63 named com.apple.pegasus was invalidated from this process." UserInfo={NSDebugDescription=The connection to service with pid 63 named com.apple.pegasus was invalidated from this process.}

这是我在代码中管理 pip 的方式:-

CustomVideoPlayer 设置 pip vc 的代码:

    private func setupPIPIfEligible() {
    if AVPictureInPictureController.isPictureInPictureSupported() {
        // Create a new controller, passing the reference to the AVPlayerLayer.
        pipVC = nil
        if let layer = playerLayer {
            pipVC = AVPictureInPictureController(playerLayer: layer)
            pipVC?.delegate = self
        }
    }}

CustomVideoPlayer 在按下按钮时切换 pip 的代码:

private func togglePIP() {
    if pipVC?.isPictureInPictureActive ?? false {
        pipVC?.stopPictureInPicture()
    } else {
        pipVC?.startPictureInPicture()
    }
}

自定义视频播放器 VC 将 pip 委托(delegate)方法转发给它的委托(delegate):

extension CustomVideoPlayerViewController: AVPictureInPictureControllerDelegate {
func pictureInPictureControllerWillStartPictureInPicture(_ pictureInPictureController: AVPictureInPictureController) {
    videoPlayerDelegate?.playerViewControllerWillStartPictureInPicture(self)
}

func pictureInPictureControllerWillStopPictureInPicture(_ pictureInPictureController: AVPictureInPictureController) {
    videoPlayerDelegate?.playerViewControllerWillStopPictureInPicture(self)
}

func pictureInPictureController(_ pictureInPictureController: AVPictureInPictureController, restoreUserInterfaceForPictureInPictureStopWithCompletionHandler completionHandler: @escaping (Bool) -> Void) {
    videoPlayerDelegate?.playerViewController(self, restoreUserInterfaceForPictureInPictureStopWithCompletionHandler: completionHandler)
}}

CustomVideoPlayerViewController 的委托(delegate)处理 pip 方法:

extension TabBarViewController: CustomVideoPlayerDelegate {

func playerViewController(_ playerViewController: UHVideoPlayerViewController, restoreUserInterfaceForPictureInPictureStopWithCompletionHandler completionHandler: @escaping (Bool) -> Void) {
    shouldReleaseVideoPlayer = false
    let currentviewController = navigationController?.visibleViewController
    if currentviewController != playerViewController, currentviewController != nil {
        if !(currentviewController?.isKind(of: CustomVideoPlayerViewController.self) ?? false) {
            currentviewController?.present(playerViewController, animated: false) {

            }
        }
    }
}

func playerViewControllerWillStartPictureInPicture(_ playerViewController: UHVideoPlayerViewController) {
    playerViewController.dismiss(animated: true, completion: nil)
}

func playerViewControllerWillStopPictureInPicture(_ playerViewController: UHVideoPlayerViewController) {
    if shouldReleaseVideoPlayer {
        currentVideoPlayer = nil
    }
    shouldReleaseVideoPlayer = true
}}

var currentVideoPlayer: CustomVideoPlayerViewController?是我为视频播放器保留的有力引用。

我已经检查过:没有内存泄漏/视频播放器引用的提前发布。

我做错了什么？

Answer 1

不要忘记，如果您使用的不是 AVPlayerViewController 而是一些自定义 View ，那么在画中画模式下播放视频时，您需要让 AVPLayerLayer 显示在屏幕上自己的层作为 AVPLayerLayer。如果您从屏幕上删除自定义 View ，画中画视频也将结束。您还需要设置 AVAudioSession 来播放长格式音频，将此代码添加到您的 AppDelegate 类:

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
    setupAudioSession()
    return true
}

private func setupAudioSession() {
    let audioSession = AVAudioSession.sharedInstance()
    do {
        try audioSession.setCategory(.playback)
        try audioSession.setActive(true, options: [])
    } catch {
        print("Setting category to AVAudioSessionCategoryPlayback failed.")
    }
}

编辑:

如果用户转到后台，画中画的意义仍然存在，视频将继续在其他应用程序之上的画中画窗口中播放。好吧，如果您想通过所有应用程序屏幕呈现画中画视频，您基本上只有两个选项(据我所知)。要么使用 AVPlayerViewController ，无论您当前在哪个屏幕上，它都会继续播放视频，或者在您的应用程序的关键窗口中显示视频，如果用户导航到其他屏幕，您可以缩小 AVPlayerlayer 的大小并在那里显示视频(就像 YouTube 那样)，或触发画中画，但在应用程序底部的某处保留一小部分 AVPlayerlayer。还有第三个选项(但我还没有尝试过那个)，它将您的自定义视频 View Controller 合并为其他一些呈现的 View Controller 的子级。但是我有一种感觉，以这种方式使用它可能会很痛苦。希望这些回答对您有所帮助。祝你好运!