About how to use UIKit in XCode


I want to know about UIKit so I watched UIKit video at https://youtu.be/8r1njDKLs90
but it only introduces UIkit
I want like following,

Suppose I want to add label and button and want to change label text when press button,
So my question is how I know which Subclass of UIKit I can use and where to put it in code


You should really go through all of Chris’ beginner videos. Not just watching a single one

UIKit is a whole framework. You can’t learn it all in a single video