Play a sound file with AVAudioPlayer

The example below plays an audio file in Swift 2.2 with Xcode 7.3.1.

1. Drag and add the example.mp3 sound file to the project.

2. Modify ViewController.swift as:

import UIKit

import AVFoundation

class ViewController: UIViewController {

    

    var button : UIButton!

    var buttonStop : UIButton!

    

    var player : AVAudioPlayer!

    let url = NSBundle.mainBundle().URLForResource("example", withExtension: "mp3")!

    override func viewDidLoad() {

        super.viewDidLoad()

        

        //Play/Pause button

        button = UIButton(frame: CGRectMake(0, 0, 200, 30))

        button.center = view.center

        button.setTitle("Play", forState: UIControlState.Normal)

        button.setTitleColor(UIColor.blueColor(), forState: UIControlState.Normal)

        button.setTitleColor(UIColor.cyanColor(), forState: UIControlState.Highlighted)

        button.addTarget(self, action: #selector(buttonPressed), forControlEvents: UIControlEvents.TouchUpInside)

        view.addSubview(button)

        

        //Stop button

        buttonStop = UIButton(frame: CGRectMake(0, 0, 200, 30))

        buttonStop.center = CGPointMake(view.center.x, view.center.y+100)

        buttonStop.setTitle("Stop", forState: UIControlState.Normal)

        buttonStop.setTitleColor(UIColor.blueColor(), forState: UIControlState.Normal)

        buttonStop.setTitleColor(UIColor.cyanColor(), forState: UIControlState.Highlighted)

        buttonStop.addTarget(self, action: #selector(buttonStopPressed), forControlEvents: UIControlEvents.TouchUpInside)

        buttonStop.hidden = true

        view.addSubview(buttonStop)

        

        do {

            player = try AVAudioPlayer(contentsOfURL: url)

        } catch {

            print("Error!")

        }

    }

    

    func buttonPressed() {

        if player.playing {

            player.pause()

            button.setTitle("Play", forState: UIControlState.Normal)

        } else {

            player.play()

            button.setTitle("Pause", forState: UIControlState.Normal)

            buttonStop.hidden = false

        }

    }

    

    func buttonStopPressed() {

        player.stop()

        player.currentTime = 0 //rewind

        buttonStop.hidden = true

        button.setTitle("Play", forState: UIControlState.Normal)

    }

    override func didReceiveMemoryWarning() {

        super.didReceiveMemoryWarning()

    }

}