Swift - Same protocol for two different classes

Question

I want to use the same protocol for two different classes. It is for two UIStoryboardSegue classes, the normal one and the unwind segue. In my first class GameSegue.swift, I've declared this protocol

@objc protocol ViewControllerWithBackgroundImage {

    var backgroundImage: UIImageView { set get }

}

I use this protocol to have access to the ViewControllers property backgroundImage. In the first class GameSegue.swift, the normal segue, the backgroundImage animates 10 px up. So in the second class GameSegueUnwind.swift, I want to do the same thing backwards, move the background 10 pxdown. But to get access to the backgroundImage property I need this protocol. Therefore it would be useful, to not declare another protocol, but instead use the same.

Any idea how this is possible?

Answer 1

In the second class just declare a new delegate variable

class GameSegueUnwind {
     var secondDelegate: ViewControllerWithBackgroundImage?
}

and you will be able to access the function in any other class that conforms to the protocol. Of course, in the conforming class remember to declare it has the delegate handler in the prepare for segue method

destinatonViewController.secondDelegate = self