Playing background music files in IOS background

IOS 4.0 and later support background playing. The following describes how to play a sound file. After the screen is closed, the sound file can still be played. The specific implementation method is as follows:
Add the following field to the plist file: The Declaration content is as follows: I

 IOS 4.0 and later support background playing. The following describes how to play a sound file. After the screen is closed, the sound file can still be played. The specific implementation method is as follows:

Add the following fields to the plist file:

The statement is as follows:

Add the uibackgroundmodes key value to info. plist. It contains one or more string values, including

Audio: provides sound playing functions in the background, including audio streams and sounds during video playback.

Location: the user's location information can be maintained in the background.

VoIP: Use the VoIP function in the background

 

In the Program , add:

avaudiosession * session = [avaudiosession sharedinstance];

[session setactive: yes error: Nil];

[session setcategory: avaudiosessioncategoryplayback error: Nil];

declares that the sound runs in the background. Finally, run the program and close the program. The sound is played successfully in the background.