Ios 从MPRemoteCommandCenter删除操作

我有两个

viewcontroller

，每个都播放不同的

AVAudioPlayer

。对于

MPRemoteCommandCenter

，每个命令都需要一组不同的命令。每个ViewController都有如下功能：

let remoteCommandCenter = MPRemoteCommandCenter().shared

func refreshCommandCenterButtons() {
        remoteCommandCenter.previousTrackCommand.isEnabled = true
        remoteCommandCenter.nextTrackCommand.isEnabled = true
        remoteCommandCenter.playCommand.isEnabled = true
        remoteCommandCenter.pauseCommand.isEnabled = true
        remoteCommandCenter.playCommand.addTarget(self, action: #selector(self.playButtonTapped))
        remoteCommandCenter.pauseCommand.addTarget(self, action: #selector(self.pauseButtonTapped))
        remoteCommandCenter.nextTrackCommand.addTarget(self, action: #selector(self.nextButtonTapped))
        remoteCommandCenter.previousTrackCommand.addTarget(self, action: #selector(self.previousButtonTapped))
        remoteCommandCenter.togglePlayPauseCommand.addTarget(self, action: #selector(self.playPauseAction))     
    }



override func viewDidLoad() {
        super.viewDidLoad()

 refreshCommandCenterButtons()

}

每当用户从

FirstViewController

播放歌曲，然后导航到

SecondViewController

，

FirstViewContoller的音频播放器就会暂停。问题是，一旦用户从
FirstViewController
导航到第二个，并按下第二个上的播放按钮，它就会播放两个音频播放器

我尝试将其添加到
refreshCommandCenterButtons（）
函数中。这将出现在
SecondViewController
中：

remoteCommandCenter.pauseCommand.removeTarget(#selector(FirstViewController().pauseButtonPressed))
remoteCommandCenter.playCommand.removeTarget(#selector(FirstViewController().playButtonPressed))
remoteCommandCenter.togglePlayPauseCommand.removeTarget(#selector(FirstViewController().playPauseTapped))

但一切都没有改变。我该怎么办？谢谢你的帮助
 ***[参考此链接]（）要解决此问题，只需self.commandCenter.previousTrackCommand.isEnabled=false self.commandCenter.nextTrackCommand.isEnabled=false self.commandCenter.playCommand.isEnabled=false self.commandCenter.pauseCommand.isEnabled=false即可