使用remoteControlReceived控制音樂的問題

我有MusicPlayer視圖控制器，您可以播放一些本地mp3文件。我需要爲我的應用程序啓用remoteControlReceived以更改應用程序外部的音樂（播放/暫停，下一個）。我的問題是切換按鈕只適用於應用程序在MusicPlayerViewController。例如，如果這個vc解散或去背景這些行動將不再工作！。首先，我在安裝這些MusicPlayerViewController通知：使用remoteControlReceived控制音樂的問題

override func viewDidLoad() { 
     super.viewDidLoad() 

     //Control Music 

     NotificationCenter.default.addObserver(self, selector: #selector(playSong), name: NSNotification.Name("playSong"), object: nil) 
     NotificationCenter.default.addObserver(self, selector: #selector(nextSong), name: NSNotification.Name("nextSong"), object: nil) 
     NotificationCenter.default.addObserver(self, selector: #selector(previousSong), name: NSNotification.Name("previousSong"), object: nil) 

}

在 AppDelegate

然後：

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool { 


    //Play music when it's on BG 
     do { 
      try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback) 
      print("AVAudioSession Category Playback OK") 
      do { 
       try AVAudioSession.sharedInstance().setActive(true) 
       print("AVAudioSession is Active") 
      } catch let error as NSError { 
       print(error.localizedDescription) 
      } 
     } catch let error as NSError { 
      print(error.localizedDescription) 
     } 

     UIApplication.shared.beginReceivingRemoteControlEvents() 

} 



override func remoteControlReceived(with event: UIEvent?) { 
     if event!.type == UIEventType.remoteControl{ 
      switch event!.subtype{ 
      case UIEventSubtype.remoteControlPlay: 
       NotificationCenter.default.post(name: NSNotification.Name("playSong"), object: nil) 

      case UIEventSubtype.remoteControlPause: 
       NotificationCenter.default.post(name: NSNotification.Name("playSong"), object: nil) 

      case UIEventSubtype.remoteControlNextTrack: 
       NotificationCenter.default.post(name: NSNotification.Name("nextSong"), object: nil) 

      case UIEventSubtype.remoteControlPreviousTrack: 
       NotificationCenter.default.post(name: NSNotification.Name("previousSong"), object: nil) 

      default: 
       print("There is an issue with the control") 
      } 
     } 
    }

什麼是我不能來自世界各地控制AVPlayer的問題！

PS：我還設置播放音樂的AppDelegate

來源

2017-07-01 Mc.Lover

編寫您有didFinishLaunchingWithOptions的代碼：分配AVAudioPlayer後。 –

@SharmaVishal謝謝！它似乎工作！ –

我可以把它描述爲你的投票和回答接受的答案嗎？ –

您需要在AVAudioPlayer應用範疇。因此，您需要在AVAudioPlayer分配後編寫以下代碼。

//分配音頻播放器&。然後

do { 
    try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback) 
    print("AVAudioSession Category Playback OK") 
    do { 
     try AVAudioSession.sharedInstance().setActive(true) 
     print("AVAudioSession is Active") 
    } catch let error as NSError { 
     print(error.localizedDescription) 
    } 
} catch let error as NSError { 
    print(error.localizedDescription) 
} 

UIApplication.shared.beginReceivingRemoteControlEvents()

希望這會幫助你。

來源

2017-07-01 14:17:06

使用remoteControlReceived控制音樂的問題

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