Iterate UIProgressView animation Programmatically - Swift

Question

I have set up a progressView and a textView, I want the progressView to animate its progress bar and when completed, to reset it, simultaneously changing the textView and start the animation again.

This is what I tried:

var iterator : Int = 0


fileprivate func setUpAnimation(){
    
    switch iterator {
    case 0:

        interactiveShowTextView.text = quotesArray[iterator]
        animateAndIterate()

    case 1:

        interactiveShowTextView.text = quotesArray[iterator]
        animateAndIterate()

    case 2:


        interactiveShowTextView.text = quotesArray[iterator]
        animateAndIterate()

    default:

            self.iterator = 0
            self.setUpAnimation()

}

}

fileprivate func animateAndIterate(){
    UIView.animate(withDuration: 0.0, animations: {
        self.progressBar.layoutIfNeeded()
    }, completion: { finished in
        self.progressBar.progress = 1.0

        UIView.animate(withDuration: 5, delay: 0.0, options: [.curveLinear], animations: {
            self.progressBar.layoutIfNeeded()
        }, completion: { finished in
            print("animation completed")
            self.iterator += 1
            self.setUpAnimation()

        })
    })
}

It works fine only at the beginning when the iterator is 0, but when I iterate it to 1 the textView starts going mad continuously changing textView texts. I don't actually know why