10.2. 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. ...
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