How to add a delay between loops when playing a tone in AVAudioPlayer?

Question

I have created a sample function, which will play a short-duration tone instantly, with the infinite loop. Here is the code:

let audioPlayer = try AVAudioPlayer(contentsOf: url)
audioPlayer.numberOfLoops = -1
audioPlayer.play()

How to create a 5 second delay before the player will play the tone again? Is there a way to do this?

Answer 1

Unfortunately there is no simple way of doing this. You should use AVAudioPlayerDelegate. Please find some example below:

class ViewController: UIViewController, AVAudioPlayerDelegate
{
    private var player: AVAudioPlayer!

    @objc private func startPlaying()
    {
         self.player = try? AVAudioPlayer(contentsOf: url)
         self.player.delegate = self
         self.player.play()
    }

    func audioPlayerDidFinishPlaying(_ player: AVAudioPlayer, successfully flag: Bool)
    {
         self.perform(#selector(startPlaying), with: nil, afterDelay: 5)
    }
}

Don't forget to stop selector whenever you want stop the continuation of the audio:

NSObject.cancelPreviousPerformRequests(withTarget: self)