How you can get notified when iOS music app modifications state

March 8, 2024

1

I’ve tried each doable technique to subscribe and I am not getting any notifications

let musicPlayer = MPMusicPlayerController.systemMusicPlayer
let appMusicPlayer = MPMusicPlayerController.applicationMusicPlayer
let queuePlayer = MPMusicPlayerController.applicationQueuePlayer

func subscribe() {


    MPMediaLibrary.requestAuthorization { _ in }      

    musicPlayer.beginGeneratingPlaybackNotifications()
    appMusicPlayer.beginGeneratingPlaybackNotifications()
    queuePlayer.beginGeneratingPlaybackNotifications()

    NotificationCenter.default.addObserver(forName: .MPMusicPlayerControllerPlaybackStateDidChange, object: musicPlayer, queue: .foremost) { [weak self] notification in
        debugPrint("hey")
    }
    
    NotificationCenter.default.addObserver(forName: .MPMusicPlayerControllerPlaybackStateDidChange, object: appMusicPlayer, queue: .foremost) { [weak self] notification in
        debugPrint("hey")
    }
    
    NotificationCenter.default.addObserver(forName: .MPMusicPlayerControllerPlaybackStateDidChange, object: queuePlayer, queue: .foremost) { [weak self] notification in
        debugPrint("hey")
    }

    NotificationCenter.default.addObserver(
        self,
        selector: #selector(playbackStateChanged(_:)),
        title: .MPMusicPlayerControllerPlaybackStateDidChange,
        object: musicPlayer
    )

    NotificationCenter.default.addObserver(
        self,
        selector: #selector(playbackStateChanged(_:)),
        title: .MPMusicPlayerControllerPlaybackStateDidChange,
        object: appMusicPlayer
    )

    NotificationCenter.default.addObserver(
        self,
        selector: #selector(playbackStateChanged(_:)),
        title: .MPMusicPlayerControllerPlaybackStateDidChange,
        object: queuePlayer
    )

}

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