picture in picture support

[coucoseth]

How can this be achieved?

Based off this comment , I was looking for this functionality but cannot seem to find how to do it

[ibcylon]

I reference apple document - custom player picture in picture
warn: pip uses copied(?) playerLayer. so you need to pause original player's state

// MARK: PIP VC and Observer
  var pipController: AVPictureInPictureController!
  var pipPossibleObservation: NSKeyValueObservation?

// Call when playerLayer set e.g. viewWillAppear
func setupPicutreInPicture(_ playerLayer: AVPlayerLayer) {
    if AVPictureInPictureController.isPictureInPictureSupported() {
      pipController = AVPictureInPictureController(playerLayer: playerLayer)
      pipController.delegate = self
      
      pipPossibleObservation = pipController.observe(\AVPictureInPictureController.isPictureInPicturePossible, options: [.initial, .new]) { [weak self] controller, change in
        self?.isPIPEnabled = change.newValue ?? false
        print("isEnabled: \(change)")
      }
    }
  }

// Bind Notification Foreground and Background
func bind() {
    NotificationCenter.default.rx.notification(UIApplication.willResignActiveNotification)
          .take(until: self.rx.deallocated)
          .asDriverOnErrorJustComplete()
          .debug("toBackground")
          .drive(onNext: { [weak self] _ in
            if self?.isPIPEnabled == true {
              self?.pipController.startPictureInPicture()
            }
          }).disposed(by: bag)
    
    NotificationCenter.default.rx.notification(UIApplication.didBecomeActiveNotification)
      .take(until: self.rx.deallocated)
      .asDriverOnErrorJustComplete()
      .debug("toForeground")
      .drive(onNext: { [weak self] _ in
        self?.pipController.stopPictureInPicture()
      }).disposed(by: bag)
  }

// PIP Delegate
extension BasicFullscreenViewController: AVPictureInPictureControllerDelegate {
  func pictureInPictureController(_ pictureInPictureController: AVPictureInPictureController, restoreUserInterfaceForPictureInPictureStopWithCompletionHandler completionHandler: @escaping (Bool) -> Void) {
    print("before restore")
    completionHandler(true)
    print("after restore")
    self.transitioner.playerView?.resume()
  }
  
  func pictureInPictureControllerWillStartPictureInPicture(_ pictureInPictureController: AVPictureInPictureController) {
      // Hide the playback controls.
      // Show the placeholder artwork.
    self.transitioner.playerView?.pause(reason: .userInteraction)
    pictureInPictureController.playerLayer.player?.play()
    print("PIP will Start")
  }

  func pictureInPictureControllerDidStopPictureInPicture(_ pictureInPictureController: AVPictureInPictureController) {
      // Hide the placeholder artwork.
      // Show the playback controls.
    print("PIP did Stop") 
  }
}