// Used Extension code

​

textView.setTextWithTypeAnimation(typedText: codeText, characterDelay:  10)

​

extension UITextView {

    func setTextWithTypeAnimation(typedText: String, characterDelay: TimeInterval = 5.0) {

        text = ""

        var writingTask: DispatchWorkItem?

        writingTask = DispatchWorkItem { [weak weakSelf = self] in

            for character in typedText {

                DispatchQueue.main.async {

                    weakSelf?.text!.append(character)

                }

                Thread.sleep(forTimeInterval: characterDelay/100)

            }

        }

        if let task = writingTask {

            let queue = DispatchQueue(label: "typespeed", qos: DispatchQoS.userInteractive)

            queue.asyncAfter(deadline: .now() + 0.05, execute: task)

        }

    }

}