AVPlayer 播放完歌曲后，如何隐藏 Remote Command Center？答案

【问题标题】：How can I hide Remote Command Center when AVPlayer has finished to play a song?AVPlayer 播放完歌曲后，如何隐藏 Remote Command Center？
【发布时间】：2020-01-15 22:27:46
【问题描述】：

我有一个使用 AVPlayer 播放 mp3 的应用程序，当曲目完成后，我正在努力隐藏远程命令中心。这是设置我的远程命令中心的功能。

如何隐藏它？

func setupRemoteCommandCenter() {

    // Get the shared MPRemoteCommandCenter
       let commandCenter = MPRemoteCommandCenter.shared()


       // Add handler for Play Command
       commandCenter.playCommand.addTarget { [unowned self] event in
        if self.avPlayer?.rate == 0.0 {
               self.togglePlayPause()
               return .success
           }
           return .commandFailed
       }

       // Add handler for Pause Command
       commandCenter.pauseCommand.addTarget { [unowned self] event in
        if self.avPlayer?.rate == 1.0 {
               self.togglePlayPause()
               return .success
           }
           return .commandFailed
       }

   let skipForwardCommand = commandCenter.skipForwardCommand
   skipForwardCommand.isEnabled = true
   skipForwardCommand.addTarget(handler: skipForward)
   skipForwardCommand.preferredIntervals = [15]

    let skipBackwardCommand = commandCenter.skipBackwardCommand
    skipBackwardCommand.isEnabled = true
    skipBackwardCommand.addTarget(handler: skipForward)
    skipBackwardCommand.preferredIntervals = [15]


    commandCenter.changePlaybackPositionCommand.addTarget { [weak self](remoteEvent) -> MPRemoteCommandHandlerStatus in
        guard let self = self else {return .commandFailed}
        if let player = self.avPlayer {
           let playerRate = player.rate
           if let event = remoteEvent as? MPChangePlaybackPositionCommandEvent {
               player.seek(to: CMTime(seconds: event.positionTime, preferredTimescale: CMTimeScale(1000)), completionHandler: { [weak self](success) in
                   guard let self = self else {return}
                   if success {
                       self.avPlayer?.rate = playerRate
                   }
               })
               return .success
            }
        }
        return .commandFailed
    }
}

【问题讨论】：

标签： ios xcode mp3 avplayer mpremotecommandcenter

【解决方案1】：

您必须从远程控制事件中取消注册并从MPNowPlayingInfoCenter清除您当前的播放信息：

UIApplication.shared.endReceivingRemoteControlEvents()        

MPNowPlayingInfoCenter.default().nowPlayingInfo = [:]

您可以通过 NotificationCenter 观察者观察AvPlayerItem 结束：

NotificationCenter.default.addObserver(self, selector: #selector(playerItemDidPlayToEndTime(_:)), name: .AVPlayerItemDidPlayToEndTime, object: playerItem)

【讨论】：