continue playing audio when iphone/device goes sleep or locked

Question

I am using the following code to keep playing audio when iPhone/iPod goes sleep or locked.

mv = [[MPMoviePlayerController alloc] initWithContentURL:[NSURL URLWithString:@"http://myurl/myMusic.mp3"]];
mv.movieSourceType = MPMovieSourceTypeUnknown;
[self.view addSubview:mv.view];
[mv play];

UInt32 sessionCategory = kAudioSessionCategory_MediaPlayback;
AudioSessionSetProperty (kAudioSessionProperty_AudioCategory, sizeof (sessionCategory), &sessionCategory); AudioSessionSetActive(true);

By using this code my device is not going into sleep mode but what i want is, device should go in sleep mode but audio should not stop playing.
I have added Required background modesand App plays audio in my info.plist file.

Please suggest me where am I wrong? Why the device is not going into sleep mode/locked?

Try this http://stackoverflow.com/a/7545093/1557663 – Mário Carvalho Sep 10 '12 at 11:02 — Mário Carvalho, Sep 10 '12 at 11:02

score 2 · Answer 1 · edited Mar 12 '13 at 04:46

2

Use this code in viewdidload:

NSError *setCategoryErr = nil;
NSError *activationErr  = nil;
[[AVAudioSession sharedInstance] setCategory: AVAudioSessionCategoryPlayback error: &setCategoryErr];
[[AVAudioSession sharedInstance] setActive: YES error: &activationErr];
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
UIBackgroundTaskIdentifier newTaskId = UIBackgroundTaskInvalid;
newTaskId = [[UIApplication sharedApplication] beginBackgroundTaskWithExpirationHandler:NULL];

It is working fine for me.

edited Mar 12 '13 at 04:46

WrightsCS

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answered Sep 11 '12 at 06:16

Vishal

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Tried it. Again app is not going into sleep mode.. I don't know where is the problem. – iUser Sep 11 '12 at 10:04
you have added Required background modes and App plays audio in my info.plist file? – Vishal Sep 11 '12 at 11:33
Yes. I have added all these things. – iUser Sep 12 '12 at 06:00

score 1 · Answer 2 · answered Sep 10 '12 at 11:22

First of all, include these frameworks to your project: AudioToolbox, CoreAudio, MediaPlayer and AVFoundation. Import them all to the viewController where your player will be placed. After you allocated and started playing the audio, insert the following code:

UInt32 sessionCategory = kAudioSessionCategory_MediaPlayback;
AudioSessionSetProperty (kAudioSessionProperty_AudioCategory, sizeof (sessionCategory), &sessionCategory);
AudioSessionSetActive(true);

And finally, go to your app Info.plist file and add a row named UIBackgroundModes. The new row will be an array and will contain 1 item, the item 0. To this you just set the value as audio. And you're done! Enjoy you're background audio playing app!

hope it helps. happy coding :)

I already tried it. The only problem is device not going into sleep mode. — iUser, Sep 10 '12 at 11:28
@Anshuk I think the code you provided, will make the device awake till the app is on foreground. — viral, Sep 10 '12 at 11:49

continue playing audio when iphone/device goes sleep or locked

2 Answers2