ios - Best way to prevent AVPlayer playing more than one track at a time -


i'm using avplayer play streaming audio , prevent playing more 1 audio track @ time. what's best way this? approach entirely programmatic -- don't use storyboard. when url sent viewcontroller (vc, delegate) sets new instance of player -- , think problem, i'm not sure. thanks.

 //this routine returns url control vc (delegate)   func selectedaudio(_ audiourl:string?) {     if let urlstring = audiourl {       setupplayer(urlstring)     }   }      //single button toggles between play/pause   func playorpausetouched() {     if isplaying  {       pauseplayer()     } else {       playplayer()     }   }    func playplayer() {     if player == nil || selectedtrackname != currenttracklabel.text{       if let urlstring = selectedaudiourl {         setupplayer(urlstring)         currenttracklabel.text = "playing: \(selectedtrackname ?? "")"       }     }     player?.play()     isplaying = true     playpausebutton.setimage(uiimage(named: "pause"), for: .normal)     activityindicatorview.startanimating()   }    func pauseplayer() {     player?.pause()     isplaying = false     playpausebutton.setimage(uiimage(named: "play"), for: .normal)   }    func setupplayer(_ urlstring:string) {     if let url = url(string:urlstring) {       player = avplayer(url: url)       let playerlayer = avplayerlayer(player: player)       player?.addobserver(self, forkeypath: "currentitem.loadedtimeranges", options: .new, context: nil)       let interval = cmtime(value: 1, timescale: 5) //gives smooth thumb movement w/short clips       player?.addperiodictimeobserver(forinterval: interval, queue: dispatchqueue.main, using: { (progresstime) in         let seconds = cmtimegetseconds(progresstime)         let secondsstring = string(format: "%02d", int(seconds.truncatingremainder(dividingby: 60)))         let minutesstring = string(format: "%02d", int(seconds / 60))         self.currenttimelabel.text = "\(minutesstring):\(secondsstring)"         if let duration = self.player?.currentitem?.duration {           let durationseconds = cmtimegetseconds(duration)           self.audioslider.value = float(seconds / durationseconds)         }       })     }   }

my opinion use kvo notify current state of avplayeritem.

means state identify current item playing, pushed, buffering or finish play.

so should take 1 flag handle current item state.

ex.

  • set flag true when item playing
  • set flag false when item finish play.
  • when tap on button play item check flag if flag == false start playing item otherwise not.

second way:

use notificationcenter below 

notificationcenter.default.addobserver(self, selector: selector(("playerdidfinishplaying:")),         name: nsnotification.name.avplayeritemdidplaytoendtime, object: player.currentitem)

and below automatically call when item finish playing

func playerdidfinishplaying(note: nsnotification) {     print("item finished playing ")    // set flag here  }

and managed flag same.


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