How do I check when a UITextField changes?

Question

I am trying to check when a text field changes, equivalent too the function used for textView - textViewDidChange so far I have done this:

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Answer 1

You can use this delegate method from UITextFieldDelegate. It fires with every character change.

(Objective C) textField:shouldChangeCharactersInRange:replacementString:
(Swift) textField(_:shouldChangeCharactersInRange:replacementString:)

However THIS ONLY FIRES BEFORE a change is made (indeed, a change is only made if you do return true from here).