Why is the protocol not working?

Question

Swift

When you click on the menu button "print('00')" works, but the protocol is not

called and it is in "MainViewController.swift"

and this is another file "ContainerViewController" where the
project is declared, there is my AlicV6 and the second from which I take an example plus a link to the video from which I watch here

Answer 1

You have delegate == nil. Therefore, only print is displayed

Answer 2

Because you didn't assign the right class as a delegate.
Write something like menuViewController.delegate = selfthis in a class that will be a delegate that will take actions