AVCaptureSession and background audio iOS 7

Question

Whenever I start an AVCaptureSession running with the microphone as an input it cancels whatever background music is currently running (iPod music for instance). If I commen

Answer 1

In your AppDelegate:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    //Stop app pausing other sound.
    [[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayAndRecord
                                     withOptions:AVAudioSessionCategoryOptionDuckOthers | AVAudioSessionCategoryOptionDefaultToSpeaker
                                           error:nil];
}

Where you are allocating AVCaptureSession:

AVCaptureSession *session = [[AVCaptureSession alloc] init];
session.automaticallyConfiguresApplicationAudioSession = NO;

This code will allow you to play background music and run AVCaptureSession with the microphone.

SWIFT UPDATE:

AppDelegate:

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {

    //Stop app pausing other sound.
    do{
        try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayAndRecord, 
                                            withOptions: [.DuckOthers, .DefaultToSpeaker])
    }
    catch {

    }

    return true
}

Where you are allocating AVCaptureSession:

let session = AVCaptureSession()
session.automaticallyConfiguresApplicationAudioSession = false