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iOS

Maxence Roy
Maxence Roy
8,753 Points
Posted by Maxence Roy
Maxence Roy
8,753 Points

How to play an audio file in iOS with Swift 3

Hi,

I'm working on an interval timer project.

Everything is working fine. Now, I want the app to play a MP3 file each time an interval is starting. I've installed the AudioToolbox.framework in the app but I need help with :

  • Where specifically do I add the audio files (I've got two 3s long mp3 files)
  • What's the code that I need to include to find the file, and trigger the sound
  • If possible, how do I make sure the sound is heard even when the app runs in background

Here's the function in which I'd include the timer trigger :

    /// Initiate the timer
    func runTimer() {
        timer = Timer.scheduledTimer(
            timeInterval: 1,
            target: self,
            selector: (#selector(ViewController.updateTimer)),
            userInfo: nil,
            repeats: true
        )

        isTimerRunning = true

        // Trigger MP3 file would go here
    }

Thanks!

  • Max

1 Answer

Maxence Roy
Maxence Roy
8,753 Points
Maxence Roy
Maxence Roy
8,753 Points

Resolved!

First, I added the sound files to the main directory of the project (Alongside ViewController.swift).

/// Imported AVFoundation import AVFoundation

/// Added this variable var player: AVAudioPlayer?

/// Build this function
func playSound(name: String) {
    if let soundURL = Bundle.main.url(forResource: name, withExtension: "mp3") {

        do {
            try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryAmbient)
            try AVAudioSession.sharedInstance().setActive(true)
            player = try AVAudioPlayer(contentsOf: soundURL)
            if let thePlayer = player {
                thePlayer.prepareToPlay()
                thePlayer.play()
            }
        }
        catch {
            print(error)
        }
    }
}

/// Called the function where needed, this would play GunShot.mp3 playSound(name: "GunShot")