AVAudioSession

AVAudioSession 은 Audio를 동시재생될 수 있도록 해주는 기능이며

background mode로 진입시에도 Audio/TTS가 Play될 수 있도록 해주는 기능

사용법

//AppDelegate.m

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    
    NSError *error = NULL;
    AVAudioSession *session = [AVAudioSession sharedInstance];
    [session setCategory:AVAudioSessionCategoryPlayback error:&error];
    if(error) {
        // Do some error handling
    }
    [session setActive:YES error:&error];
    if (error) {
        // Do some error handling
    }
 
    return YES;
}

//ViewController.m(Player Controller)

 
-(void)viewDidAppear:(BOOL)animated{
    [[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
    [self becomeFirstResponder];
}
 
-(void)viewWillDisappear:(BOOL)animated {
    [[UIApplication sharedApplication] endReceivingRemoteControlEvents];
    [self resignFirstResponder];
    [super viewWillDisappear:animated];
} 
 
- (BOOL) canBecomeFirstResponder {
    return YES;
}
 
//airPlay Button Event
- (void) remoteControlReceivedWithEvent: (UIEvent *) receivedEvent {
    NSLog(@"received event!");
    if (receivedEvent.type == UIEventTypeRemoteControl) { 
        switch (receivedEvent.subtype) {
        case UIEventSubtypeRemoteControlTogglePlayPause: { // airPlay가 일시정지 상태일 경우 
            [self startAudio:nil];
            break;
        }
        case UIEventSubtypeRemoteControlPlay: { // airPlay가 재생 상태일 경우 
            [self startAudio:nil];
            break;
        }
        case UIEventSubtypeRemoteControlPause: {
            [self startAudio:nil];
            break;
        }
        default:
        break;
        }
    }
}