ios - AV Player observer in Swift - message was received but not handled -

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i'm trying implement observer av player in pure swift.

i'm getting error: message received not handled. because object argument in constructor of observer i'm using nil?

i've placed example code below.

thanks

    player.addobserver(self, forkeypath: "status", options:nskeyvalueobservingoptions(), context: nil)     player.addobserver(self, forkeypath: "playbackbufferempty", options:nskeyvalueobservingoptions(), context: nil)     player.addobserver(self, forkeypath: "playbacklikelytokeepup", options:nskeyvalueobservingoptions(), context: nil)     player.addobserver(self, forkeypath: "loadedtimeranges", options: nskeyvalueobservingoptions(), context: nil)   private func deallocobservers(player: avplayer) {     player.removeobserver(self, forkeypath: "status")     player.removeobserver(self, forkeypath: "playbackbufferempty")     player.removeobserver(self, forkeypath: "playbacklikelytokeepup")  }  //observer av play  override  func observevalue(forkeypath keypath: string?, of object: any?, change: [nskeyvaluechangekey : any]?, context: unsafemutablerawpointer?) {         if keypath == "status" {             print("change @ keypath = \(keypath) \(object)")         }          if keypath == "playbackbufferempty" {             print("playbackbufferempty - change @ keypath = \(keypath) \(object)")         }          if keypath == "playbacklikelytokeepup" {             print("change @ keypath = \(keypath) \(object)")         } }

normally issue happens when registered observer deallocates , kvo event triggers after that. fixing need remove observers before object going deallocated.

in case, registered 4 kvo changes , removing 3. following kvo observer not removed anywhere , causing issue.

player.addobserver(self, forkeypath: "loadedtimeranges", options: nskeyvalueobservingoptions(), context: nil)

change deallocobservers: method like:

private func deallocobservers(player: avplayer) {     player.removeobserver(self, forkeypath: "status")     player.removeobserver(self, forkeypath: "playbackbufferempty")     player.removeobserver(self, forkeypath: "playbacklikelytokeepup")     player.removeobserver(self, forkeypath: "loadedtimeranges") }

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