How to Get Audio Controls on Lock Screen/Control Center from Avaudioplayer in Swift

How Do I Get Audio Controls on Lock Screen/Control Center from AVAudioPlayer in Swift

You need to invoke beginReceivingRemoteControlEvents() otherwise it will not work on the actual device.

Swift 3.1

UIApplication.shared.beginReceivingRemoteControlEvents()

If you would like to specify custom actions for the MPRemoteCommandCenter:

let commandCenter = MPRemoteCommandCenter.shared()
commandCenter.nextTrackCommand.isEnabled = true
commandCenter.nextTrackCommand.addTarget(self, action:#selector(nextTrackCommandSelector))

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edit/update:

Apple has a sample project showing how to Becoming a Now Playable App

AudioPlayer and lockscreen/control center control Swift

You need to use the MPRemoteCommandCenter to do this. For example in your viewControllers viewDidLoad() you can add this:

override func viewDidLoad() {
    super.viewDidLoad()

    UIApplication.shared.beginReceivingRemoteControlEvents()
    let commandCenter = MPRemoteCommandCenter.shared()

    commandCenter.pauseCommand.addTarget { (event) -> MPRemoteCommandHandlerStatus in
        //Update your button here for the pause command
        return .success
    }

    commandCenter.playCommand.addTarget { (event) -> MPRemoteCommandHandlerStatus in
        //Update your button here for the play command
        return .success
    }

}

Just change the comments I have included to update your buttons UI. You will also need to import MediaPlayer and MediaPlayer.framework if you have not done so already.

Is there a way to show lock screen controls using AVAudioEngine and AVAudioPlayerNode?

So here is the solution to my problem, I was starting my AVAudioEngine together with its setup function called from viewDidLoad(), that was the issue, and i used .play()/.pause() methods on my AVAudioPlayerNode to manipulate the audio, however AVAudioPlayerNode does not emit master audio, outputNode of AVAudioEngine does.

So whenever you want to play/pause audio from inside your app or from command center, if you are using AVAudioEngine to handle audio in you application, don’t forget to call .stop()/.start() methods on your AVAudioEngine. Lock screen controls should show up and play/pause buttons should update properly in command center/lock screen even without a single property set to MPNowPlayingInfoCenter.default().nowPlayingInfo.

MPRemoteCommandCenter setup:

func setupRemoteControl() {

    let commandCenter = MPRemoteCommandCenter.shared()

    commandCenter.playCommand.isEnabled = true
    commandCenter.playCommand.addTarget { (_) -> MPRemoteCommandHandlerStatus in
        try? self.audioEngine.start()
        return .success
    }

    commandCenter.pauseCommand.isEnabled = true
    commandCenter.pauseCommand.addTarget { (_) -> MPRemoteCommandHandlerStatus in
        self.audioEngine.stop()
        return .success
    }
}

How to store current audio information in bottom panel (AVAudioPlayer, Swift)

Possible Duplicate, Check this answer.

In case the link breaks, it seems you need to enable remote control events with:

[[UIApplication sharedApplication] beginReceivingRemoteControlEvents]; 

This should enable the play/pause buttons to send controls to your application. You'll need to set the now playing information manually...

// Swift code, will need converting
var mpic = MPNowPlayingInfoCenter.defaultCenter()
mpic.nowPlayingInfo = [
    MPMediaItemPropertyTitle:"This Is a Test",
    MPMediaItemPropertyArtist:"Matt Neuburg"
]

You will also need to act on the control events received:

- (void)remoteControlReceivedWithEvent:(UIEvent *)receivedEvent {

    if (receivedEvent.type == UIEventTypeRemoteControl) {

        switch (receivedEvent.subtype) {

            case UIEventSubtypeRemoteControlTogglePlayPause:
                [self playOrStop: nil];
                break;

            case UIEventSubtypeRemoteControlPreviousTrack:
                [self previousTrack: nil];
                break;

            case UIEventSubtypeRemoteControlNextTrack:
                [self nextTrack: nil];
                break;

            default:
                break;
        }
    }
}

Audio playback lock screen controls not displaying on iPhone

The issue turned out to be this line...

try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback, with: AVAudioSessionCategoryOptions.duckOthers)

Once I changed it to

try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback, with: [])

everything worked fine. So it seems that passing in any argument for AVAudioSessionCategoryPlaybackOptions causes the lock screen controls to not display. I also tried passing in .mixWithOthers an that too caused the lock screen controls to not be displayed

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