Playing multiple audio files in a row - ios

Question

I set the 4 UIButtons on the Main StoryBoard.
I would like "Button4" to implement the method of the other three Buttons in a row. (At first, plays an audio file and set selected "Button1" then "Button2" then "Button3")
However "Button2" and "Button3" are played at same time.
fileprivate var player1:AVAudioPlayer?
fileprivate var player2:AVAudioPlayer?
fileprivate var player3:AVAudioPlayer?
let url1 = Bundle.main.bundleURL.appendingPathComponent("music1.mp3")
let url2 = Bundle.main.bundleURL.appendingPathComponent("music2.mp3")
let url3 = Bundle.main.bundleURL.appendingPathComponent("music3.mp3")
#IBAction func pushButton1(sender: UIButton) {
Player(url: url1)
}
#IBAction func pushButton2(sender: UIButton) {
Player1(url: url2)
}
#IBAction func pushButton3(_ sender: UIButton) {
Player2(url: url1, url2: url2, url3: url3)
}
func audioPlayerDidFinishPlaying(_ player: AVAudioPlayer, successfully flag: Bool) {
if (player === player1) {
yourButton.isSelected = false
} else if (player === player2) {
yourButton2.isSelected = false
} else if (player === player3) {
yourButton.isSelected = false
player2!.play()
yourButton2.isSelected = true
player2!.play()
yourButton3.isSelected = true
player1!.play()
}
}
func Player(url: URL) {
do {
try player1 = AVAudioPlayer(contentsOf:url)
player1!.play()
yourButton.isSelected = true
player1!.delegate = self
} catch {
print(error)
}
}
func Player1(url: URL) {
do {
try player2 = AVAudioPlayer(contentsOf:url)
player2!.play()
yourButton2.isSelected = true
player2!.delegate = self
} catch {
print(error)
}
}
func Player2(url: URL, url2: URL, url3: URL) {
do {
try player3 = AVAudioPlayer(contentsOf:url)
try player2 = AVAudioPlayer(contentsOf: url2)
try player1 = AVAudioPlayer(contentsOf: url3)
player3!.play()
yourButton.isSelected = true
player3!.delegate = self
player2!.delegate = self
player1!.delegate = self
} catch {
print(error)
}
}

Answer 1

I believe that when you press button 4, player 1 should be played first, after that player 2 and after that player 3. For this task, the below code should work.
let url1 = Bundle.main.bundleURL.appendingPathComponent("music1.mp3")
let url2 = Bundle.main.bundleURL.appendingPathComponent("music2.mp3")
let url3 = Bundle.main.bundleURL.appendingPathComponent("music3.mp3")
func audioPlayerDidFinishPlaying(_ player: AVAudioPlayer, successfully flag: Bool) {
if (player === player1) {
yourButton.isSelected = false
yourButton2.isSelected = true
do {
//initialise player 2
player2 = try AVAudioPlayer(contentsOf: url2)
player2!.delegate = self
}catch {
}
player2!.play()
} else if (player === player2) {
yourButton3.isSelected = true
yourButton2.isSelected = false
do {
//initialise player 3
player3 = try AVAudioPlayer(contentsOf: url3)
player3!.delegate = self
}catch {
}
player3!.play()
} else if (player === player3) {
yourButton3.isSelected = false
}
}