我正在开发音乐应用程序,但对于锁定屏幕控制,我无法分配持续时间和已用时间
这是我的代码
let commandCenter = MPRemoteCommandCenter.shared()
commandCenter.prevIoUsTrackCommand.isEnabled = true;
commandCenter.prevIoUsTrackCommand.addTarget(self,action:#selector(home_ViewController.btn_rewind(_:)))
commandCenter.nextTrackCommand.isEnabled = true
commandCenter.nextTrackCommand.addTarget(self,action:#selector(home_ViewController.btn_fast(_:)))
commandCenter.playCommand.isEnabled = true
commandCenter.playCommand.addTarget(self,action:#selector(home_ViewController.play_player))
commandCenter.pauseCommand.isEnabled = true
commandCenter.pauseCommand.addTarget(self,action:#selector(home_ViewController.pause_player))
commandCenter.togglePlayPauseCommand.isEnabled = true
commandCenter.togglePlayPauseCommand.addTarget(self,action:#selector(home_ViewController.togglePlay_Pause))
commandCenter.skipBackwardCommand.isEnabled = false
commandCenter.skipForwardCommand.isEnabled = false
if #available(iOS 9.1,*) {
commandCenter.changePlaybackPositionCommand.isEnabled = true
} else {
// Fallback on earlier versions
return
}
和媒体信息
func setLockInfo()
{
let url = URL(string: song_UrlString)
let data = try? Data(contentsOf: url!)
let art = MPMediaItemArtwork.init(image: UIImage(data: data!)!)
let songInfo :[String : Any] = [MPMediaItemPropertyTitle :st_title,MPMediaItemPropertyArtwork : art]
MPNowPlayingInfoCenter.default().nowPlayingInfo = songInfo
}
我正在使用SWIFT 3进行编码
解决方法
它没有显示时间,因为你没有告诉它显示时间.
要显示播放时间,nowPlayingInfo字典需要包含键的值：
> MPNowPlayingInfoPropertyElapsedPlaybackTime,所以它知道你开始玩的时候是什么时候,
> MPMediaItemPropertyPlaybackDuration,所以它知道当前时间相对于酒吧是什么,并且
> MPNowPlayingInfoPropertyPlaybackRate,因此它可以自动更新播放时间UI,而无需您定期设置当前时间.
如果您希望播放时间栏是交互式的(即允许跳转到不同的时间而不是仅显示当前时间,请在远程命令中心注册changePlaybackPositionCommand.
