Trying to press one button then play audios in sequence or random - ios

Question

I am trying to press one button and the audio file plays one after another.
Here is my code below. I press play button and both sounds play at the same time.
I am trying to press play button and the sound starts and stop then the other sound file starts and stops. One button pressed for 2 sound files to press is my goal. Thank you
I am trying this in a loop but it is not working.
import UIKit
import AVFoundation
class ViewController: UIViewController {
#IBOutlet weak var sliderValue: UISlider!
var player:AVAudioPlayer = AVAudioPlayer()
var player1:AVAudioPlayer = AVAudioPlayer()
#IBAction func play(_ sender: AnyObject) {
player.play()
player1.play()
}
#IBAction func pause(_ sender: AnyObject) {
player.pause()
}
#IBAction func stop(_ sender: AnyObject) {
player.stop()
player.currentTime = 0
}
#IBAction func sliderChanged(_ sender: AnyObject) {
player.volume = sliderValue.value
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
let audioPath = Bundle.main.path(forResource: "sound1", ofType: "mp3")!
let audioPath1 = Bundle.main.path(forResource: "sound2", ofType: "mp3")!
do {
try player = AVAudioPlayer(contentsOf: URL(fileURLWithPath: audioPath))
try player1 = AVAudioPlayer(contentsOf: URL(fileURLWithPath: audioPath1))
} catch{
//Process Error here
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}

Answer 1

Of course you can't do it in a loop!
The correct way to play a sound file after another is to use the AVAudioPlayerDelegate.
In your view controller, conform to AVAudioPlayerDelegate:
class YourViewController: UIViewController, AVAudioPlayerDelegate {
// ...
func audioPlayerDidFinishPlaying(_ player: AVAudioPlayer,
successfully flag: Bool) {
}
}
As you can see, I added an audioPlayerDidFinishPlaying method to the controller.
So you want to play player first, then player1, right?
In viewDidLoad, add this line:
player.delegate = self
And in the method I just added, write:
player1.play()
And the other IBAction methods should be changed a little:
#IBAction func play(_ sender: AnyObject) {
player.play()
}
#IBAction func pause(_ sender: AnyObject) {
if player.isPlaying {
player.pause()
} else if player1.isPlaying {
player1.pause()
}
}
#IBAction func stop(_ sender: AnyObject) {
if player.isPlaying {
player.stop()
} else if player1.isPlaying {
player1.stop()
}
}
#IBAction func sliderChanged(_ sender: AnyObject) {
player.volume = sliderValue.value
player1.volume = sliderValue.value
}

Answer 2

If you can manage this also with another object AVQueuePlayer, you can find the documentation here and here a guide.