9.2. Handling Interruptions While Playing Audio
Problem
You want your AVAudioPlayer
instance to resume playing
after an interruption on an iOS device, such as an incoming
call.
Solution
Implement the audioPlayerBeginInterruption:
and audioPlayerEndInterruption:withFlags:
methods of the AVAudioPlayerDelegate
protocol in the
delegate object of your AVAudioPlayer
instance:
- (void)audioPlayerBeginInterruption:(AVAudioPlayer *)player{ /* Audio Session is interrupted. The player will be paused here */ } - (void)audioPlayerEndInterruption:(AVAudioPlayer *)player withFlags:(NSUInteger)flags{ if (flags == AVAudioSessionInterruptionFlags_ShouldResume && player != nil){ [player play]; } }
Discussion
On an iOS device, such as an iPhone, a phone call could interrupt the execution of
the foreground application. In that case, the audio session(s)
associated with the application will be deactivated, and audio files
will not be played until the interruption has ended. At the beginning
and the end of an interruption, we receive delegate messages from the
AVAudioPlayer
informing us of the
different states the audio session is passing through. After the end
of an interruption, we can simply resume the playback of audio.
Note
Incoming phone calls cannot be simulated with iPhone Simulator. You must always test your applications on a real device.
When an interruption occurs, the audioPlayerBeginInterruption:
delegate
method of an AVAudioPlayer
instance will be called. Here, your audio session has been deactivated. ...
Get iOS 5 Programming Cookbook now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.