Let's see how we can leverage the factory method pattern in order to improve existing code.
Let's say you're building an app that let users poke, message, or call their contacts, as follows:
enum ContactAction { case call case message case poke}class ContactController: NSViewController { let callButton = NSButton(title: "Call", target: self, action: #selector(processAction(from:))) let messageButton = NSButton(title: "Message", target: self, action: #selector(processAction(from:))) let pokeButton = NSButton(title: "Poke", target: self, action: #selector(processAction(from:))) private func action(for button: NSButton) -> ContactAction { switch button { case callButton: return .call case messageButton: return ...
