SwiftUI AVPlayer Error Reporting/Handling - swift

Question

I've created a media app, which plays music via HTTP live stream in SwiftUI. The code (snippet) looks like following:
struct PlayerView: View {
#State var audioPlayer: AVPlayer!
#State var buttonSymbol: String = "pause.circle.fill"
let url: URL!
var body: some View {
VStack {
Text("Sound")
HStack {
Button(action: {
if self.audioPlayer.rate != 0.0 {
self.buttonSymbol = "play.circle.fill"
self.audioPlayer.pause()
} else {
self.buttonSymbol = "pause.circle.fill"
self.audioPlayer.play()
}
}) {
Image(systemName: self.buttonSymbol)
}
.buttonStyle(PlainButtonStyle())
}
}
.onAppear {let audioSession = AVAudioSession.sharedInstance()
do {
try audioSession.setCategory(AVAudioSession.Category.playback, mode: .default, policy: AVAudioSession.RouteSharingPolicy.longFormAudio, options: [])
} catch let error {
fatalError("*** Unable to set up the audio session: \(error.localizedDescription)")
}
let item = AVPlayerItem(url: self.url)
self.audioPlayer = AVPlayer(playerItem: item)
audioSession.activate(options: []) { (success, error) in
guard error == nil else {
fatalError("An error occurred: \(error!.localizedDescription)")
return
}
self.audioPlayer.play()
}
}
}
}
My lack of understanding is, how do I receive the underlying AVPlayer/AVPlayerItem errors (for instance the HTTP stream is interrupted) in SwiftUI in order to show them in the UI? Which SwiftUI action I have to use and how?

Answer 1

According to the documentation AVPlayerItem has a notification called AVPlayerItemFailedToPlayToEndTime.
One possible implementation in a Viewmodel would be:
import Combine
....
playerItemFailedToPlayToEndTimeObserver = NotificationCenter
.default
.publisher(for: NSNotification.Name.AVPlayerItemFailedToPlayToEndTime)
.sink(receiveValue: {[weak self] notification in
// handle notification here
})
You would need to hold a reference to playerItemFailedToPlayToEndTimeObserver else it will go out of scope as soon as the method calling this finished.