问题
I'm new on Swift. I write because I want to ask a question. Me and my friend we are developing an audio player, but we have a problem. The player also works in background and remote controls from the lockscreen and the control center work, but if music is interrupted by one of these two controls, the play/pause button of our player is not updated with the correct icon. My question is, how can I make it clear to the player that the music was starting/stopping by one of the remote controls and the player to act accordingly, changing the icon of play/pause button? thanks a lot, I hope I was clear.
回答1:
You need to use the MPRemoteCommandCenter to do this. For example in your viewControllers viewDidLoad() you can add this:
override func viewDidLoad() {
super.viewDidLoad()
UIApplication.shared.beginReceivingRemoteControlEvents()
let commandCenter = MPRemoteCommandCenter.shared()
commandCenter.pauseCommand.addTarget { (event) -> MPRemoteCommandHandlerStatus in
//Update your button here for the pause command
return .success
}
commandCenter.playCommand.addTarget { (event) -> MPRemoteCommandHandlerStatus in
//Update your button here for the play command
return .success
}
}
Just change the comments I have included to update your buttons UI. You will also need to import MediaPlayer and MediaPlayer.framework if you have not done so already.
来源：https://stackoverflow.com/questions/42897354/audioplayer-and-lockscreen-control-center-control-swift