Swift：命令中心不起作用，即使我明确设置按钮启用？

Posted 2023-03-08

【中文标题】Swift：命令中心不起作用，即使我明确设置按钮启用？

【英文标题】：Swift: command center not working, even though I explicitly set buttons to enable?

【发布时间】：2018-05-23 00:09:13

【问题描述】：

好的，Apple 的命令中心出现了一些问题，播放背景音频/在锁定屏幕上，不明白为什么。看起来很简单，但我什至没有在指挥中心可靠地显示剧集信息，绝对无法播放/暂停。

首先我开始音频会话：

  do 
                try AVAudiosession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback, with: .mixWithOthers)
                print("Playback OK")
                try AVAudioSession.sharedInstance().setActive(true)
                print("Session is Active")
             catch 
                print(error)
            

然后我将我的命令中心按钮设置为明确启用：

UIApplication.shared.beginReceivingRemoteControlEvents()
        let commandCenter = MPRemoteCommandCenter.shared()


        commandCenter.skipForwardCommand.isEnabled = true
        commandCenter.skipBackwardCommand.isEnabled = true
        commandCenter.nextTrackCommand.isEnabled = true

        commandCenter.togglePlayPauseCommand.isEnabled = true
//        commandCenter.previousTrackCommand.isEnabled = true
//        commandCenter.togglePlayPauseCommand.isEnabled = true

        commandCenter.togglePlayPauseCommand.addTarget(self, action:#selector(togglePlayPause))
//        commandCenter.nextTrackCommand.addTarget(self, action:#selector(nextTrackForward))
//        commandCenter.previousTrackCommand.addTarget(self, action:#selector(nextTrackBack))

        commandCenter.skipForwardCommand.addTarget(self, action:#selector(ffPressed))
        commandCenter.skipBackwardCommand.addTarget(self, action:#selector(rwPressed))

如果这对音频很重要，这里是 lldb plist 键：

这里有什么问题？

【参考方案1】：

也许你的问题很老，但有人可能也需要这个，所以我就是这样做的：

Swift 5

let player = AVPlayer()

func commandCenter () 
    let commandCenter = MPRemoteCommandCenter.shared()
    commandCenter.playCommand.addTarget          (commandEvent) -> MPRemoteCommandHandlerStatus in  self.play();   return .success 
    commandCenter.pauseCommand.addTarget         (commandEvent) -> MPRemoteCommandHandlerStatus in  self.pause();  return .success 


func pause () 
    player.pause ()
    print("paused")


func play () 
    player.play()
    print("play")

您不需要启用 commandCenter.playCommand 为 true