Play Sound Function

playSound.swift

// MARK: Play sound function
func playSound(fileName: String) {
    guard let url = Bundle.main.url(forResource: fileName, withExtension: "mp3") else {
        print("the sound file isn't founded")
        return
    }

    do {
        try AVAudioSession.sharedInstance().setCategory(.playback, mode: .default)
        try AVAudioSession.sharedInstance().setActive(true)

        // The following line is required for the player to work on iOS 11
        player = try AVAudioPlayer(contentsOf: url)

        guard let player = player else { return }

        player.play()

    } catch let error {
        print(error.localizedDescription)
    }
}