iamcrypticcoder

protocol AbstractGUIFactory {
    func createButton() -> Button
    func createWindow() -> Window
}

iamcrypticcoder

class WinButton: Button {
    var title: String?
    
    func setTitle(_ title: String) -> Void {
        self.title = title
    }
    
    func show() -> Void {
        print("Showing Windows style button [Title: \(self.title!)]")
    }

iamcrypticcoder

protocol Button {
    func setTitle(_ title: String) -> Void
    func show() -> Void
}

protocol Window {
    func setTitle(_ title: String) -> Void
    func show() -> Void
}

iamcrypticcoder

class GUIBuilder {
    private var platform: String
    private var guiFactory: AbstractGUIFactory?
    
    init(platform: String) {
        self.platform = platform
    }
    
    func initGuiFactory() -> Void {
        if nil != guiFactory { return }