textfielddidbegin editing not updating label

Question

My swift code below goal is when the user enters something into textfield tt it reflects it in currentPageLabel. The func that I thought would do this is having no effect. Nothing I enter into the textfield displays on the label. All of my code does not use a storyboard.

var currentPageLabel = UILabel()
var tt = UITextfield()

func textFieldDidBeginEditing(_ textField: UITextField) {
    currentPageLabel.text = tt.text
}

Answer 1

Try this UITextFieldDelegate method:

func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
    let text = (textField.text as NSString?)?.replacingCharacters(in: range, with: string)
    currentPageLabel.text = text
    return true
}