CODEWITHSUNDEEP
iosavaudioplayer
Steve A
Steve A

Reputation: 2013

iOS AVAudioPlayer sound stops playing when screen is locked

I’ve read many articles/posts on this topic, but I’m still unable to play a sound while the screen is locked.

In viewDidLoad, I initialize the audio session and set the audio property to kAudioSessionCategory_MediaPlayback:

AudioSessionInitialize(NULL, NULL, interruptionListenerCallback, self);
UInt32 sessionCategory = kAudioSessionCategory_MediaPlayback;
AudioSessionSetProperty(kAudioSessionProperty_AudioCategory, sizeof(sessionCategory), &sessionCategory);
AudioSessionSetActive(true);

I then initialize my AVAudioPlayer variable (audioPlayer):

NSString *soundFilePath = [[NSBundle mainBundle] pathForResource: @"click" ofType: @"wav"];
NSURL *fileURL = [[NSURL alloc] initFileURLWithPath: soundFilePath];

NSError *error;
audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL: fileURL error: &error];
[fileURL release];

I added “App plays audio” to a “Required background modes” section of my info.plist.

I added AVAudioPlayerDelegate and AVAudioSessionDelegate to my view controller’s *.h file (although I don’t know if that was necessary).

I play the (very short) sound periodically (~1x per second):

[audioPlayer play]

The sound plays fine when the screen is unlocked, but stops playing when I lock it. When I then unlock the screen, the (queued) sounds are played.

Ideas? Thanks!

Upvotes: 2

Views: 3448

Answers (2)

Steve A
Steve A

Reputation: 2013

It seems the problem is that I'm starting to play the sound after the screen has been locked. That's mostly answered in How to play sounds in locked mode on iPhone.

Upvotes: 0

Steve A
Steve A

Reputation: 2013

Thanks holex:

I got "App plays audio" from http://mobile.tutsplus.com/tutorials/iphone/ios-sdk_background-audio/.

If you add a row with UIBackgroundModes to the plist, it's automatically populated and includes this and six other background modes. If you Google "App plays audio" and UIBackgroundModes you'll see plenty of hits.

[I would have replied via a Comment rather than an Answer, but alas, I don't have the reputation.]

Upvotes: 0

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