Is there a way for the MainViewController to know when a press IBAction function has been called? [closed]

Answer 1

1. Built-in NotificationCenter API to broadcast notifications whenever the press method is called.

   let nofitication = NotificationCenter.default
   nofitication.post(name: Notification.Name("pressMethodCalled"), object: nil)
   

Register the notification:

nofitication.addObserver(self, selector: #selector(your_method_name), name: Notification.Name("pressMethodCalled"), object: nil)

2. Delegates: One to One. Read more here - https://medium.com/@jamesrochabrun/implementing-delegates-in-swift-step-by-step-d3211cbac3ef