當音樂播放器正在暫停時檢測

Question

不知道是否有可能檢測到手機中「iPod」中的音樂正在暫停，而不是暫停或當前正在播放，只是音樂暫停時。我想我應該使用AVAudio？

謝謝！

Answer 1

MPMusicPlayerController有一個方法：

+(MPMusicPlayerController *)iPodMusicPlayer; 

的iPod音樂播放器採用了iPod應用程序以您的名義。在 實例化中，它將呈現當前的iPod應用程序狀態並控制 ，該狀態表示您的應用程序正在運行。具體而言，共享狀態包括 以下：

重複模式（見「重複模式」）隨機播放模式（見「隨機模式」 現在扮演選項（見nowPlayingItem）播放狀態（參見 playbackState）的其它方面。iPod的狀態，如在這去 播放列表，不是共享的音樂正在播放繼續 您的應用程序移動到後臺時發揮

您可以檢查其playbackState這可能是：

enum { 
    MPMusicPlaybackStateStopped, 
    MPMusicPlaybackStatePlaying, 
    MPMusicPlaybackStatePaused, 
    MPMusicPlaybackStateInterrupted, 
    MPMusicPlaybackStateSeekingForward, 
    MPMusicPlaybackStateSeekingBackward 
}; 
typedef NSInteger MPMusicPlaybackState; 

如果playbackState更改爲MPMusicPlayerControllerPlaybackStateDidChangeNotification，您也可以收到通知。

@property (nonatomic, strong) MPMusicPlayerController *musicPlayer; 
-(void)iPodMusicPlayer 
{ 
    musicPlayer = [MPMusicPlayerController iPodMusicPlayer]; 
    switch ([musicPlayer playbackState]) 
    { 
     case: MPMusicPlaybackStateStopped: 
      NSLog(@"iPod player is stopped)"; 
      //Do something 
      break; 
     case: MPMusicPlaybackStatePaused: 
      NSLog(@"iPod player is paused"); 
      //Do something 
      break; 
     case: MPMusicPlaybackStatePlaying: 
      NSLog(@"iPod player is playing"); 
      //Do something 
      break; 
     //Etc. 
     default: 
      break; 
    } 

    [[NSNotificationCenter defaultCenter] addObserver:self 
              selector:@selector(musicPlayerPlayBackStatusChanged:) 
               name:MPMusicPlayerControllerPlaybackStateDidChangeNotification 
               object:nil]; 

    [musicPlayer beginGeneratingPlaybackNotifications]; 
} 

-(void)musicPlayerPlayBackStatusChanged:(NSNotification *)notification 
{ 
    switch ([musicPlayer playbackState]) 
    { 
     case: MPMusicPlaybackStateStopped: 
      NSLog(@"iPod player is stopped)"; 
      //Do something 
      break; 
     case: MPMusicPlaybackStatePaused: 
      NSLog(@"iPod player is paused"); 
      //Do something 
      break; 
     case: MPMusicPlaybackStatePlaying: 
      NSLog(@"iPod player is playing"); 
      //Do something 
      break; 
     //Etc. 
     default: 
      break; 
    } 
}