问当视频暂停时，AVPlayer Fairplay HLS不会停止音频播放

EN

class PlayHelper {

    static let shared = PlayHelper()

    fileprivate var playerViewController: PlayerViewController?

    init() {

        AssetPlaybackManager.sharedManager.delegate = self
    }

    // Play video without DRM
    func playVideo(from urlString: String, at context: UIViewController) {

        guard let videoURL = URL(string: urlString) else {
            Log.error("Video URL can't be created from string: \(urlString)")
            return }

        let player = AVPlayer(url: videoURL)

        let playerViewController = PlayerViewController()
        playerViewController.player = player

        context.present(playerViewController, animated: true) {
            playerViewController.player?.play()
        }
    }

    // Play FPS video
    func playFpsVideo(with asset: AVURLAsset, at context: UIViewController) {

        // Cleanup, should be done when playerViewController is actually dismissed
        if self.playerViewController != nil {
            // The view reappeared as a results of dismissing an AVPlayerViewController.
            // Perform cleanup.
            AssetPlaybackManager.sharedManager.setAssetForPlayback(nil)
            self.playerViewController?.player = nil
            self.playerViewController = nil
        }

        let item = AVPlayerItem(asset: asset)

        let player = AVPlayer(playerItem: item)

        // Customize player
        player.appliesMediaSelectionCriteriaAutomatically = true

        let playerViewController = PlayerViewController()
        playerViewController.player = player

        self.playerViewController = playerViewController

        context.present(playerViewController, animated: true) {
            playerViewController.player?.play()
        }
    }

    // Stop video
    func stop() {

        // Cleanup, should be done when playerViewController is dismissed
        if self.playerViewController != nil {

            // Results of dismissing an AVPlayerViewController, perform cleanup
            AssetPlaybackManager.sharedManager.setAssetForPlayback(nil)
            self.playerViewController?.player = nil
            self.playerViewController = nil
        }
    }
}


// MARK: - Extend `PlayHelper` to conform to the `AssetPlaybackDelegate` protocol

extension PlayHelper: AssetPlaybackDelegate {

    func streamPlaybackManager(_ streamPlaybackManager: AssetPlaybackManager, playerReadyToPlay player: AVPlayer) {

        player.play()
    }

    func streamPlaybackManager(_ streamPlaybackManager: AssetPlaybackManager, playerCurrentItemDidChange player: AVPlayer) {

        guard let playerViewController = playerViewController, player.currentItem != nil else { return }

        playerViewController.player = player
    }
}