How can I allow background music to continue playing while my app still plays its sounds while using Swift

Question

I created an app and I am attempting to allow the user to continue to listen to their music while playing my game, but whenever they hit \"play\" and the ingame sounds occur

Answer 1

lchamp's solution worked perfectly for me, adapted for Objective-C:

[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryAmbient error:nil];
[[AVAudioSession sharedInstance] setActive:YES error:nil];