About Tableview and Button Unselectable Grayouts

I am creating an application with swift.

I found out how to disable TableView and buttons, but
I don't know how to gray out.

I am forcing myself to change the color and title of the background.
Is there anything wrong?

In particular, I set the icon in Tableview, so I am troubled that it is not possible with the above method.
(Do I need to create a grayout version of the icon?)

Thank you for your cooperation.