锁定屏幕iPod控制不与Spotify音乐播放器工作

I added the Spotify player to my app which also plays music using the MPMusicPlayerController. When music is playing from Spotify and the screen is locked, the remote control events are not received for play/pause and FFW/RWD when the user presses these buttons on the locked screen.I added the Spotify player to my app which also