AVKit 中的新功能

1:16 - New canStartPictureInPictureAutomaticallyFromInline property

// New property on AVPlayerViewController / AVPictureInPictureController.
var canStartPictureInPictureAutomaticallyFromInline: Bool { get set }

1:40 - Setting up AVPictureInPictureController with an AVPlayerLayer

func setupPictureInPicture() {
    // Ensure PiP is supported by current device.
    if AVPictureInPictureController.isPictureInPictureSupported() {
        // Create a new controller, passing the reference to the AVPlayerLayer.
        pictureInPictureController = AVPictureInPictureController(playerLayer: playerLayer)
        pictureInPictureController.delegate = self
        
        // Observe AVPictureInPictureController.isPictureInPicturePossible to update the PiP
        // button’s enabled state.
    } else {
        // PiP isn't supported by the current device. Disable the PiP button.
        pictureInPictureButton.isEnabled = false
    }
}

2:11 - Starting and stopping picture in picture

@IBAction func togglePictureInPictureMode(_ sender: UIButton) {
    if pictureInPictureController.isPictureInPictureActive {
        pictureInPictureController.stopPictureInPicture()
    } else {
        pictureInPictureController.startPictureInPicture()
    }
}

2:56 - AVPictureInPictureSampleBufferPlaybackDelegate

public protocol AVPictureInPictureSampleBufferPlaybackDelegate: NSObjectProtocol{

    // Delegate is responsible for:
    //
    // - Supplying playback state information for PiP UI.
    // - Responding to user input from PiP UI.

}

3:17 - Toggle playback of the video and seek back / ahead 15 seconds

func pictureInPictureController(_ pictureInPictureController: AVPictureInPictureController, setPlaying playing: Bool)

func pictureInPictureController(_ pictureInPictureController: AVPictureInPictureController, skipByInterval skipInterval: CMTime, completion completionHandler: @escaping () -› Void)

3:31 - Provide elapsed time information

func pictureInPictureControllerTimeRangeForPlayback(_ pictureInPictureController: AVPictureInPictureController) -> CMTimeRange

3:51 - Choose appropriate media variant for render size

func pictureInPictureController(_ pictureInPictureController: AVPictureInPictureController, didTransitionToRenderSize newRenderSize: CMVideoDimensions)

4:06 - Update playback state

func pictureInPictureControllerIsPlaybackPaused(pictureInPictureController: AVPictureInPictureController) -> Bool

6:05 - iOS / MacCatalyst - Persist full screen playback

func playerViewController(_ playerViewController: AVPlayerViewController, willBeginFullScreenPresentationWithAnimationCoordinator coordinator: UIViewControllerTransitionCoordinator) {
    coordinator.animate(alongsideTransition: nil) { context in
        // Keep a strong reference to the playerViewController while in full screen.
        self.detachedPlayerViewController = playerViewController
    }
}

6:38 - iOS / MacCatalyst - Release the playerViewController

func playerViewController(_ playerViewController: AVPlayerViewController, willEndFullScreenPresentationWithAnimationCoordinator coordinator: UIViewControllerTransitionCoordinator){
    coordinator.animate(alongsideTransition: nil) { context in
        // Stop keeping the playerViewController alive when transition completes,
        self.detachedPlayerViewController = nil
    }
}

6:46 - Persist full screen playback on macOS

func playerViewWillEnterFullScreen(_ playerView: AVPlayerView) {
    // Start keeping the player view alive while it is not in the view hierarchy.
    self.detachedPlayerView = playerView
}

func playerViewWillExitFullScreen(_ playerView: AVPlayerView) {
    // Stop keeping the player view alive.
    self.detachedPlayerView = nil
}

6:55 - Restoring UI when exiting full screen

// Restoring UI when exiting full screen

// iOS / MacCatalyst
func playerViewControllerRestoreUserInterfaceForFullScreenExit(_ playerViewController: AVPlayerViewController) async -> Bool {
	// Custom UI restoration logic
	return true
}

// macOS
func playerViewRestoreUserInterfaceForFullScreenExit(_ playerView: AVPlayerView) async -> Bool {
	// custom UI restore logic here		
	return true
}