I wanted to know how would I make so that when a user taps on a text field it clears the text already in it?
Just in IB, select Clear on Editing.
Select the Attributes inspector for the textField.
In the first section, you have Clear button
Below, select Clear when editing begins.
But it could be more comfortable for user to let him/her choose : in this case, select Clear Button : appears or is always visible.