MPNowPlayingInfoCenter踩坑

主要为音频播放设置锁屏界面

代码如下：

        var info = [String:Any]()
        ///标题
        info[MPMediaItemPropertyTitle] = self.currentAudioM?.title ?? " "
        ///作者
//        info[MPMediaItemPropertyArtist] = "wizet"
        //相簿标题
//        info[MPMediaItemPropertyAlbumTitle] = "相册标题"
        ///封面
//        let artWork = MPMediaItemArtwork(boundsSize: image!.size, requestHandler: { (size) -> UIImage in return image! })
//        info[MPMediaItemPropertyArtwork] = artWork
        //当前播放进度 （会被自动计算出来，自动计算与MPNowPlayingInfoPropertyPlaybackRate设置的速率正相关)
        let currentPlayDuration = TimeInterval(self.player.currentPlayDuration)
        info[MPNowPlayingInfoPropertyElapsedPlaybackTime] = currentPlayDuration
        //调整外部显示的播放速率正常为1、一般都是根据内部播放器的播放速率作同步，一般不必修改
        //  info[MPNowPlayingInfoPropertyPlaybackRate] = NSNumber(value: 1)
        //播放总时间 由当前播放的资源提供
//        let v1 = TimeInterval(self.player.duration-self.player.currentPlayDuration)
        let duration = TimeInterval(self.player.duration)
        info[MPMediaItemPropertyPlaybackDuration] = duration
    
        MPNowPlayingInfoCenter.default().nowPlayingInfo = info

坑1：希望播放结束后，锁屏控制界面消失

A: UIApplication.shared.endReceivingRemoteControlEvents()实现，实际会经常出现不能消失的问题，猜想：beginReceivingRemoteControlEvents和endReceivingRemoteControlEvents可能有对应，所以，在每次beginReceivingRemoteControlEvents操作前，调用endReceivingRemoteControlEvents。

代码如下

            UIApplication.shared.endReceivingRemoteControlEvents()
            UIApplication.shared.beginReceivingRemoteControlEvents()
            self.setPlayerNowPlayingInfo()