即使设备被锁定，如何在AVQueuePlayer中循环播放歌曲队列？

Question

I already have a looping implementation, and it works when the device is open. I listen for the AVPlayerItem.DidPlayToEndTimeNotification and handle the looping in that Callback. But as soon as the device is locked, it the AVQueuePlayer does not play. Is this somehow related to iOS backgrounding and how apps function when backgrounded?

Answer 1

Normally, Apple does not allow apps to run in background. If you want to play a song in background, you should set the Required Background Modes property in the application's Info.plist .

Audio - Music players and other applications that work with audio content may be registered to continue playing audio even when the app is no longer in the foreground. If an app in this category attempts to do anything other than play audio or download while in the background, iOS will terminate it.

Look at the document and ask for permission.

Answer 2

I fixed the problem. When an AVPlayer stops playing, the app is suspended by iOS even with Background Modes enabled. My looping logic is implemented right after the AVPlayer plays the last item so it doesn't get executed in the background.