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我有 2 个ViewControllers，每个都播放不同的AVAudioPlayer. 每个人都需要一组不同的命令MPRemoteCommandCenter。每个 ViewController 都有这样的东西：

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 播放歌曲FirstViewController，然后导航到 时SecondViewController，FirstViewContoller'saudioPlayer 就会暂停。问题在于，一旦用户从第二台导航FirstViewController到第二台并按下第二台上的播放按钮，它就会同时播放两个音频播放器。

我尝试将其添加到refreshCommandCenterButtons()函数中。这将在SecondViewController：

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

但什么都没有改变。我该怎么办？谢谢您的帮助！

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