I'm creating a Mac OS app, using SwiftUI.
I have a NSViewRepresentable that wraps the AVPlayer:
class PlaybackModel {
var player: AVPlayer!
var playerLayer: AVPlayerLayer!
func createPlayerLayer() -> AVPlayerLayer {
let result = AVPlayerLayer(player: self.player)
result.videoGravity = .resizeAspect
result.needsDisplayOnBoundsChange = true
result.backgroundColor = .black
self.playerLayer = result
}
}
struct PlayerViewAdapter: NSViewRepresentable {
let playbackModel: PlaybackModel!
func makeNSView(context: Context) -> BasePlayerView {
return BasePlayerView(playbackModel)
}
func updateNSView(_ nsView: BasePlayerView, context: Context) {
}
}
and the BasePlayerView uses the AVPlayerLayer as a backing layer:
class BasePlayerView: NSView {
private var playbackModel: PlaybackModel!
init(_ playbackModel: PlaybackModel) {
self.playbackModel = playbackModel
super.init(frame: .zero)
wantsLayer = true
}
override func makeBackingLayer() -> CALayer {
return playbackModel.playerLayer
}
}
Initially it works fine and I can see the video playing inside the view.
Alas, there seems to be an issue during SwiftUI re-render process, when the PlayerViewAdapter.makeNSView() method gets called again for the same PlaybackModel (due to state changes), the AVPlayerLayer is not rendered in the newly created BasePlayerView.
Do I need to perform some additional action during this re-creation of the player views?