Why doesn't AVAudioPlayer play any audio? - swift

Question

At the moment I have two functions which are almost identical, but only one of them works and I can't figure out why.
The playSound() function works and uses the class's audioPlayer: AVAudioPlayer object to play one audio file at a time.
To make it so I could play multiple sounds simultaneously, I made a new function called playMySound() which creates its own instance of AVAudioPlayer instead of using the class's audioPlayer: AVAudioPlayer object.
The weird thing is, the sound plays fine when I call playSound(), but it doesn't play when I call playMySound().
Here's the code that works:
var audioPlayer: AVAudioPlayer!
override func viewDidLoad() {
super.viewDidLoad()
audioPlayer = AVAudioPlayer()
}
func playSound(audioFileName: String) {
if let sound = NSDataAsset(name: audioFileName) {
do {
try! AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback)
try! AVAudioSession.sharedInstance().setActive(true)
try audioPlayer = AVAudioPlayer(data: sound.data)
audioPlayer.delegate = self
audioPlayer.play()
} catch {
print("Error playing sound: \(audioFileName)")
}
}
}
And the code that doesn't work:
func playMySound(audioFileName: String) {
if let sound = NSDataAsset(name: audioFileName) {
do {
try! AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback)
try! AVAudioSession.sharedInstance().setActive(true)
var myAudioPlayer: AVAudioPlayer = AVAudioPlayer()
myAudioPlayer = try AVAudioPlayer(data: sound.data)
myAudioPlayer.delegate = self
// Calling prepareToPlay() doesn't seem to fix it
// myAudioPlayer.prepareToPlay()
print("Trying to play my audio player")
myAudioPlayer.play()
} catch {
print("Error playing sound: \(audioFileName)")
}
}
}
"Trying to play my audio player" gets outputted to the console, so it's definitely running through the function, but for some reason calling myAudioPlayer.play() doesn't seem to work.
Can anyone help? Thanks in advance!