Play audio in background

I want my app will play musi开发者_JS百科c when she is in the background too, there is any way to do it? i try to use apple documentation but it didn't work. it is possible that because i am now using the avplayer i cant play audio in background?

i play the music with

ExtAudioFileSeek(mExtAFRef, finalFrames);

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I think playing audio in background is possible only for streaming audio. For normal audio we can only play when screen is locked.

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You should look at documentation of using background tasks like:

http://developer.apple.com/library/ios/#DOCUMENTATION/iPhone/Conceptual/iPhoneOSProgrammingGuide/BackgroundExecution/BackgroundExecution.html

and specially the:

http://developer.apple.com/library/ios/#DOCUMENTATION/iPhone/Conceptual/iPhoneOSProgrammingGuide/BackgroundExecution/BackgroundExecution.html#//apple_ref/doc/uid/TP40007072-CH5-SW14