How to stop background sound (swift3) - ios

Question

I used the function slowPlay to create an action that will play background music. I tried to do the reverse in stop to stop the music. But the music does not stop.
I just want to have a button that plays the music and stops the music. I'm using the code:
#IBAction func play(_ sender: Any) {
slowPlay
}
#IBAction func stop(_ sender: Any) {
slowStop
}
func slowPlay() {
do {
let ap = Bundle.main.path(forResource: "slowslow", ofType: "mp3")
try player = AVAudioPlayer(contentsOf: NSURL(fileURLWithPath: ap!) as URL)
} catch {
////
}
let session = AVAudioSession.sharedInstance()
do {
try session.setCategory(AVAudioSessionCategoryPlayback)
} catch {
}
player?.play()
}
func slowStop() {
do {
let ap = Bundle.main.path(forResource: "slowslow", ofType: "mp3")
try player = AVAudioPlayer(contentsOf: NSURL(fileURLWithPath: ap!) as URL)
} catch {
////
}
let session = AVAudioSession.sharedInstance()
do {
try session.setCategory(AVAudioSessionCategoryPlayback)
} catch {
}
player?.stop()
}

Answer 1

If you look at your code example you are creating a new instance of the player for both play and stop.
You need to create a class variable for your player, something like:
var player: AVAudioPlayer?
This will allow you to stop like this:
func slowStop() {
player?.stop()
}

Answer 2

Create a single instance for player like blow
var player: AVAudioPlayer?
func slowPlay() {
do {
let ap = Bundle.main.path(forResource: "slowslow", ofType: "mp3")
self.player = try AVAudioPlayer(contentsOf: NSURL(fileURLWithPath: ap!) as URL)
} catch {
////
}
let session = AVAudioSession.sharedInstance()
do {
try session.setCategory(AVAudioSessionCategoryPlayback)
} catch {
//catch error here
}
self.player?.play()
}
func slowStop() {
self.player?.stop()
}
You can add validation to check whether player is valid or not before performing any action.