Typing animation: deleting characters

Question

Here\'s a typing animation that adds up characters from an Array to the text of a text field at a fixed time interval:

@IBOutlet weak var textFieldMain: UITextFi         


        

Answer 1

Why not do the following:

func deleteLetter() {
    if textFieldMain.text != "" {
        textFieldMain.text = str.substringToIndex(textFieldMain.text.endIndex.predecessor())
    } else {
       typingAnimationTimer?.invalidate()
    }
}

By the way, if you start your timer with "repeats: true" in fireDeletionTimer() you don't need to recreate it again and again in deleteLetter()

Also, stringByReplacingOccurrencesOfString() clears every instance of that letter in your text, not just the last one.