MPNowPlayingInfoCenter再生ポーズ画像が変更されない

Question

私は以下のコードを使用しています。アプリケーションがバックグラウンドになると、このコードは完全に動作します。アプリがバックグラウンドで表示されず、現在再生中の曲を再生して一時停止しようとすると、再生と一時停止の画像は変更されません。毎回ブレークポイントに入る広告はcase UIEventSubtypeRemoteControlPause:ケースに入ります。

albumArt= [[MPMediaItemArtwork alloc] initWithImage: img.image]; 
      NSDictionary *playingNowInfo = @{MPMediaItemPropertyTitle: (self.currentItem.songname==nil) ? (@"") : (self.currentItem.songname), 
              MPMediaItemPropertyPlaybackDuration: @(self.currentItem.duration), 
              MPMediaItemPropertyArtist:[MusicSetting getArtistName], 
              MPMediaItemPropertyAlbumTitle:(self.currentItem.albumname==nil) ? (@"") : (self.currentItem.albumname), 
              MPNowPlayingInfoPropertyPlaybackRate: @(self.player.rate), 
              MPNowPlayingInfoPropertyElapsedPlaybackTime: @(CMTimeGetSeconds(self.player.currentItem.currentTime)), 
              MPMediaItemPropertyArtwork:albumArt, 
              }; 
      [MPNowPlayingInfoCenter defaultCenter].nowPlayingInfo = playingNowInfo; 

#pragma mark - Remote Control 

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

    // [self.manager remoteControlReceivedWithEvent:receivedEvent]; 
    if (receivedEvent.type == UIEventTypeRemoteControl) { 

     switch (receivedEvent.subtype) { 

      case UIEventSubtypeRemoteControlPlay: 
       [self Onclick_Play_Pause:self]; 
       break; 

      case UIEventSubtypeRemoteControlPause: 
       [self Onclick_Play_Pause:self]; 
       break; 

      case UIEventSubtypeRemoteControlTogglePlayPause: 

       //if ([self.manager.player isPlaying]) 
       if(self.manager.player.rate != 0) 
       { 
        [self.manager.player pause]; 
       } 

       else { 
        [self.manager.player play]; 
       } 
       break; 
      case UIEventSubtypeRemoteControlNextTrack: 
       [self Onclick_next:self]; 
       NSLog(@"Next song play"); 
       break; 
      case UIEventSubtypeRemoteControlPreviousTrack: 
       [self Onclick_prev:self]; 
       NSLog(@"Prev song play"); 
       break; 

      default: 
       break; 
     } 
    } 
} 

- (IBAction)Onclick_Play_Pause:(id)sender { 
    (AppObj).playerview_height=playviewHeight; 

    if(self.manager.player.rate != 0) 
    { 
     [MusicSetting set_SongStatus:@"Pause"]; 
     [self.Play_PauseBtn setImage:[UIImage imageNamed:@"pauseImg"] forState:UIControlStateNormal]; 
     [self.manager pause]; 
    } 
    else { 
     [MusicSetting set_SongStatus:@"Play"]; 
     [MusicSetting set_isMusicPlay:@"Playing"]; 

     [self.Play_PauseBtn setImage:[UIImage imageNamed:@"playImg"] forState:UIControlStateNormal]; 

     [self.manager play]; 
    } 
} 

ありがとうございます！

Answer 1

- (IBAction)Onclick_Play_Pause:(id)sender { 
    MPNowPlayingInfoCenter *center = [MPNowPlayingInfoCenter defaultCenter]; 
     NSMutableDictionary *playingInfo = [NSMutableDictionary dictionaryWithDictionary:center.nowPlayingInfo]; 
    (AppObj).playerview_height=playviewHeight; 

    if(self.manager.player.rate != 0) 
    { 
     [MusicSetting set_SongStatus:@"Pause"]; 
     [self.Play_PauseBtn setImage:[UIImage imageNamed:@"pauseImg"] forState:UIControlStateNormal]; 
     [self.manager pause]; 
     //set playback rate 
     [playingInfo setObject:[NSNumber numberWithFloat:0] forKey:MPNowPlayingInfoPropertyPlaybackRate]; 
    } 
    else 
    { 
     [MusicSetting set_SongStatus:@"Play"]; 
     [MusicSetting set_isMusicPlay:@"Playing"]; 

     [self.Play_PauseBtn setImage:[UIImage imageNamed:@"playImg"] forState:UIControlStateNormal]; 
     [self.manager play]; 
     //set playback rate 
     [playingInfo setObject:[NSNumber numberWithFloat:1] forKey:MPNowPlayingInfoPropertyPlaybackRate]; 
    } 
    center.nowPlayingInfo = playingInfo; 

} 

Answer 2

こんにちは確認してくださいあなたは、あなたの方法ではなく、三番目に呼ばれる最初の2つのケースでコード

case UIEventSubtypeRemoteControlPlay: 
      [self Onclick_Play_Pause:self]; 
      break; 

     case UIEventSubtypeRemoteControlPause: 
      [self Onclick_Play_Pause:self]; 
      break; 

     case UIEventSubtypeRemoteControlTogglePlayPause: 

      //if ([self.manager.player isPlaying]) 
      if(self.manager.player.rate != 0) 
      { 
       [self.manager.player pause]; 
      } 

      else { 
       [self.manager.player play]; 
      } 
      break; 

を以下しているInfo.plistファイル

に

Answer 3

を以下を追加しましたあなたのメソッドの定義を共有できますか？