Play sound with AKAudioPlayer - iOS - swift

Question

How to declare AKAudioPlayer?
I'm using AudioKit Lib and I just need help to play .wav file with change file button.
import UIKit
import AudioKit
class ViewController: UIViewController {
let file = NSBundle.mainBundle().pathForResource("song", ofType: "wav")
let song = AKAudioPlayer(file!) // <--- ERROR = instance member 'file' cannot be used on type
override func viewDidLoad() {
super.viewDidLoad()
AudioKit.output = song
AudioKit.start()
song.play()
}
#IBAction func btn(sender: AnyObject) {
song.replaceFile("NewFile")
song.play()
}
}

Answer 1

This is a very fast solution to your problem. It can be done better but at least you can get the idea.
First try to make a new class with a function to play your file and then another function to reload your new replacement file like this.
class PlayMyMusic {
var songFile = NSBundle.mainBundle()
var player: AKAudioPlayer!
func play(file: String, type: String) -> AKAudioPlayer {
let song = songFile.pathForResource(file, ofType: type)
player = AKAudioPlayer(song!)
return player
}
func rePlay(file: String, type: String, curPlay: AKAudioPlayer) {
let song = songFile.pathForResource(file, ofType: type)
curPlay.stop()
curPlay.replaceFile(song!)
curPlay.play()
}
}
Initiate the class inside your view
class testViewController: UIViewController {
let doPlay = PlayMyMusic().play("A", type: "wav")
.........
.........
Play your music inside your view
override func viewDidLoad() {
super.viewDidLoad()
AudioKit.output = self.doPlay
AudioKit.start()
doPlay.looping = true
doPlay.play()
}
Then when you want to reload a new file use the rePlay function
#IBAction func btn(sender: AnyObject) {
PlayMyMusic().rePlay("C", type: "wav", curPlay: self.doPlay)
}

Answer 2

take look on AudioKit playground
update
AKAudioPlayer is deprecated, use AudioPlayer insted and check AudioKit v5 Migration Guide