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

I didn't think that just setting the AVAudioSession to AVAudioSessionCategoryOptions.duckOthers would work, but it did. Here is my full code to help the rookies like myself.

Swift 4 - Full Example:

var audioPlayer = AVAudioPlayer()


func playSound(sound: String){
    let path = Bundle.main.path(forResource: sound, ofType: nil)!
    let url = URL(fileURLWithPath: path)

    let audioSession = AVAudioSession.sharedInstance()
    try!audioSession.setCategory(AVAudioSessionCategoryPlayback, with: AVAudioSessionCategoryOptions.duckOthers)

    do {
        audioPlayer = try AVAudioPlayer(contentsOf: url)
        audioPlayer.play()
    } catch {
        print("couldn't load the file")
    }
}

I still need to figure out setActive (I was looking at this blog post) but the audio stops ducking when I leave the app, so it works for my app.