CODEWITHSUNDEEP
iphoneios4avaudioplayermultitasking
user416445
user416445

Reputation:

How to play multiple audio files in the background in iOS 4?

I ran audio in the background in my iPhone app using AVAudioPlayer and AVAudioSession...

Now my problem is that I already have a written code that takes a number of songs as input from the user and plays them one after the other using AVAudioPlayer...

The problem is that when the app goes to the background while one of the files is being played, the audio continues but when it's done, the sound disappears... In foreground when a file is done, I just do some code to play the next one but in the background this is not possible...

I thought about requesting some time to get this done and run my code but I can't do this as the audio files always change and they might be long... So please tell me what should I do? Is there any built-in playlist player that run as a background audio? or is there any other solution? I really need to get this into work...

thanks a lot

Upvotes: 0

Views: 1608

Answers (3)

Vijay Rathod
Vijay Rathod

Reputation: 197

//ViewController.h ,write below code
@interface ViewController :   UIViewController<AVAudioRecorderDelegate,AVAudioPlayerDelegate>

//assign property to player
 @property(nonatomic,retain) AVAudioPlayer *player;

//then write in ViewController.m file in ViewDidLoad Method below code

[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil];
[[AVAudioSession sharedInstance] setActive: YES error: nil];
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];

NSError *soundError;
NSString *path=[[NSBundle mainBundle]pathForResource:@"soundFileName" ofType:@"mp3"]; //.mp3 file for player
NSURL *file=[[NSURL alloc]initFileURLWithPath:path]; //path
_player=[[AVAudioPlayer alloc]initWithContentsOfURL:file error:&soundError];       //player Object

if(_player == nil)
{
    NSLog(@"player is empty because of %@",soundError);
}
else
{
    [_player play];
    _player.volume=1.0;
    [_player setDelegate:self];
}

// for stop player you can use // [_player stop]; //uncomment this line when you wants to stop it.

Upvotes: 0

j2emanue
j2emanue

Reputation: 62519

this is easy ..just change the cateogry if your using an audio session that is ...

http://developer.apple.com/library/ios/#documentation/Audio/Conceptual/AudioSessionProgrammingGuide/AudioSessionCategories/AudioSessionCategories.html

the link has the categories ...so use one of these and you be able to start the sound in the background: AVAudioSessionCategoryPlayback kAudioSessionCategory_MediaPlayback

  • the ambient one might not work.

Upvotes: 0

user183082
user183082

Reputation:

I ran into the same issue and haven't completely resolved it yet. The audioDidFinishPlaying delegate method still fires, and you can use UIAplication's beginBackgroundTask to create a new instance of AVaudioPlayer, make sure AVAudioSession is still active, etc. But when I try to play the new AVAudioPlayer instance, it pauses immediately. My suspicion/fear is that there is no way to start the audio FROM the background, only keep it playing when the application state transition happens. I'd love to be wrong, though.

Upvotes: 2

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