How to resume background music after out-going phone call (iOS)?

Question

I'm using AVAudioPlayer to play music (background supported). My question is if I want to call somebody while I'm listening to the music, how to resume it after the call? I've implement the AVAudioPlayer's delegate method:

- (void)audioPlayerEndInterruption:(AVAudioPlayer *)thePlayer {
    [[AVAudioSession sharedInstance] setActive:YES error:nil];
    [self.player play];
}

but this will not allow the music to continue.

I've also tried to use the AVAudioSessionDelegate method (just a try):

- (void)viewDidLoad {
    [[AVAudioSession sharedInstance] setDelegate:self];
}

- (void)endInterruption
{
    [[AVAudioSession sharedInstance] setActive:YES error:nil];
    [self.player play];
}

but again this won't cause the music to resume. Any ideas about how to solve this problem?

Answer 1

strange from your code is, you're telling that you do use AVAudioPlayer, why do you then implement AVAudioSessionDelegate?

And you have bad implementation of delegate methods. See docs

from AVAudioPlayerDelegate:

- (void)audioPlayerEndInterruption:(AVAudioPlayer *)player

- (void)audioPlayerEndInterruption:(AVAudioPlayer *)player withFlags:(NSUInteger)flags

So try to implement them like this, and it should be working properly

Answer 2

On iOS, an app can not start playing audio when already in the background. If your app's audio is stopped because a foreground app has taken control of the audio session, there is (currently) no way to take it back.