@IBAction func switchSelection(_ sender: UIButton) {
if startStopButton.currentTitle! == "Start" {
 startStopButton.setTitle("Stop", for: UIControlState())

do {
switch theAlertType {
case 1:
self.audioPlayer = try AVAudioPlayer(contentsOf: alert1)


default:
self.audioPlayer = try AVAudioPlayer(contentsOf: alert2)

}

pickerView.isUserInteractionEnabled = false
alertTypeSegmentedControl.isEnabled = false

self.playAlert()
self.theTimer.invalidate()
self.theTimer = Timer.scheduledTimer(timeInterval: theInterval,
target: self, selector: #selector(ViewController.playAlert),
userInfo: nil, repeats: true)

} catch {
print("Error getting the audio file")
}
} else {
startStopButton.setTitle("Start", for: UIControlState())

pickerView.isUserInteractionEnabled = true
alertTypeSegmentedControl.isEnabled = true

self.audioPlayer.stop()
self.theTimer.invalidate()
}
}