How to inspect the responder chain?

Question

I\'m doing some crazy multiple documents inside a single window stuff with the document-based architecture and I\'m 95% done.

I have this two-tier document architect

Answer 1

Here is the simplest one

    extension UIResponder {
        func responderChain() -> String {
            guard let next = next else {
                return String(describing: self)
            }

            return String(describing: self) + " -> " + next.responderChain()
        }
    }

    // ...

    print(self.responderChain())