Uitextfield detect clear button pressed

1. How to show clear button in textField Swift?
2. What is Uitextfield delegate?
3. What is Uitextfield for?

How to show clear button in textField Swift?

In UIKit you can set textField. clearButtonMode = . whileEditing to make the text field automatically show a standard clear button inside that clears the text once the user types something.

What is Uitextfield delegate?

A set of optional methods to manage the editing and validation of text in a text field object.

What is Uitextfield for?

An object that displays an editable text area in your interface.