Swift how to pause audio - ios

Question

So I am creating a simple radio station app. I have coded the following and got the play / pause button switching text. I just can't work out how to access the player in the button when the func is inside ViewDidLoad. I am sure I need to set global variables?
override func viewDidAppear(_ animated: Bool) {
guard let url = URL(string: "http://stream.radiomedia.com.au:8003/stream") else {
return
}
// Create a new AVPlayer and associate it with the player view
let player = AVPlayer(url: url)
player.allowsExternalPlayback = true
player.usesExternalPlaybackWhileExternalScreenIsActive = true
// Create a new AVPlayerViewController and pass it a reference to the player.
let playerViewController = AVPlayerViewController()
playerViewController.contentOverlayView?.backgroundColor = UIColor.white
playerViewController.view.frame = CGRect (x:100, y:100, width:200, height:200)
playerViewController.player = player
self.addChild(playerViewController)
self.view.addSubview(playerViewController.view)
playerViewController.didMove(toParent: self)
playerViewController.player = player
player.play()
}
#IBAction func playVideo(_ sender: Any) {
if(playButton == false){
playButton = true;
(sender as! UIButton).setTitle("Pause", for: [])
player.pause() // does not work
}else
{
playButton = false;
(sender as! UIButton).setTitle("Play", for: [])
player.play() // does not work
}
}

Answer 1

class YourVC: UIViewController {
var player = AVPlayer()
}
just declare the player inside your class so that other functions can access it.
and in your viewDidApper(), change:
let player = AVPlayer(url: url)
to
self.player = AVPlayer(url: url)
then you can call player.pause() and player.play() from anywhere inside your Class.

Answer 2

import UIKit
import AVFoundation
class AudioPlayerVC: UIViewController {
var audioPlayer = AVAudioPlayer()
override func viewDidLoad() {
super.viewDidLoad()
var alertSound = NSURL(fileURLWithPath: NSBundle.mainBundle().pathForResource("wakeUp", ofType: ".mp3"))
var error:NSError?
audioPlayer = AVAudioPlayer(contentsOfURL: alertSound, error: &error)
audioPlayer.prepareToPlay()
audioPlayer.play()
}
#IBAction func onPressPlayPaush(_ sender: UIButton) {
if(sender == false){
sender = true
audioPlayer.pause()
}else
{
sender = false
audioPlayer.play()
}
}