How to add audio to a Swift based iOS app

Setting up the app

• Create a new Single Page Application 
• Open the ViewController.swift file
• Add the AVFoundation module to your import statements

Initiate the player 

• var audioPlayer:AVAudioPlayer!

Get a handle on the file path 

• if var filePath = NSBundle.mainBundle().pathForResource("file_name", ofType: "mp3"){ }

Convert filepath String data type to NSURL data type 

var filePathUrl = NSURL.fileURLWithPath(filePath)

Implement playback controls 

• audioPlayer.stop()
• audioPlayer.rate = 0.5
• audioPlayer.currentTime = 0.0
• audioPlayer.play()

The following code is a concrete working example of the AVFoundation module that I implement as part of Udacity's iOS Nanodegree program.

 //  
 // PlaySoundsViewController.swift
 // Pitch Perfect 
 //  
 // Created by Michael Droz on 4/11/15.  
 // Copyright (c) 2014 Benefakter Apps by Michael Droz. All rights reserved.  
 // 

import UIKit
import AVFoundation

class PlaySoundsViewController: UIViewController {
    
    var audioPlayer:AVAudioPlayer!
    
    @IBOutlet weak var stopButton: UIButton!
    
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        stopButton.enabled = false
        //get handle on audio file
        if var filePath = NSBundle.mainBundle().pathForResource("movie_quote", ofType: "mp3"){
            var filePathUrl = NSURL.fileURLWithPath(filePath)
            audioPlayer = AVAudioPlayer(contentsOfURL: filePathUrl, error: nil)
            audioPlayer.enableRate = true
            
        }else {
            println("error retrieving file path")
        }
            }
    
    @IBAction func playSlowAudio(sender: UIButton) {
        audioPlayer.stop()
        audioPlayer.rate = 0.5
        audioPlayer.currentTime = 0.0
        audioPlayer.play()
        stopButton.enabled = true
        
    }
    
    @IBAction func playFastAudio(sender: UIButton) {
        audioPlayer.stop()
        audioPlayer.rate = 1.5
        audioPlayer.currentTime = 0.0
        audioPlayer.play()
        stopButton.enabled = true
    }
    
    @IBAction func stopPlayingAudio(sender: UIButton) {
        
        audioPlayer.stop()
        stopButton.enabled = false
    }
    
    
        }