Question

I am using AudioPlayer to stop all playbacks , as code is given

NSURL *url = [NSURL fileURLWithPath:[NSString stringWithFormat:@"%@/audiofile.mp3", [[NSBundle mainBundle] resourcePath]]];

NSError *error;
audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:&error];
audioPlayer.numberOfLoops = -1;

if (audioPlayer == nil)
    NSLog([error description]);             
else 
    [audioPlayer play];

But i can stop all play back using this but can not again play stopped play backs.How can I do this please help

Answer 1

You can easily play pause stop your AVAudioPlayer with these three methods:

- (void)pause
- (void)stop
- (BOOL)play //Returns YES on success, or NO on error.

If you pause, you can then play to resume from where you paused.

Hope this helps, i really don’t see where your problem is!

---

in the code you gave, you are not pausing, you are just playing it with numberOfLoops negative.
You should have a method to start your music like this:

NSURL *url = [NSURL fileURLWithPath:[NSString stringWithFormat:@"%@/audiofile.mp3", [[NSBundle mainBundle] resourcePath]]];

NSError *error;
audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:&error];
audioPlayer.numberOfLoops = 0;//play once

if (audioPlayer == nil)
    NSLog([error description]);             
else 
[audioPlayer prepareToPlay];        
[audioPlayer play];

And another for pausing:

[audioPlayer pause];

And another for resuming:

[audioPlayer play];

---

To toggle iPod music when the app starts and exits override these two methods:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    MPMusicPlayerController     *musicPlayer;   
    MPMusicPlaybackState playbackState = [musicPlayer playbackState];
    if (playbackState == MPMusicPlaybackStatePlaying) { //simple verification
        [musicPlayer pause];
    }
}

- (void)applicationWillResignActive:(UIApplication *)application

    if (playbackState == MPMusicPlaybackStateStopped || playbackState == MPMusicPlaybackStatePaused) {//simple verification
        [musicPlayer play];
}
    }

Hope it finally suits your needs!