How to improve your Swift Code - PART 3 - Xcode file structure in SwiftUI

Hello, my name is Aurélio, I'm from Brazil, I'm 52 years old, I need some help, I'm taking the Swift course online, I have a question that I have to answer but I can't. the port would be this
If you want Interface Builder to reflect UI changes that you have written in code, you must prefix your custom class with what designation? but I've tried several answers but it's always wrong. and this message appears, could you help me to solve it please.

Hi Karin, your videos are really great and help a lot to improve one‘s Swift coding skills, many thanks for this. Would you maybe consider showing a tutorial about how to make a simple game like TicTacToe (maybe with an AI as opponent) or some Sudoku solver/generator? I‘d be interested in stuff like that very much :) But anyway and as I already said, your videos are of huge help!!!!

Nice, I have a similar practice! I also create an extension of the type to put the nested type in.

great im waiting for next parts if will be available!

Tnx! Why did you use [unowned self] in closure ?

Thank you very much for this Karin

Great Tips ....