import UIKitstruct Person { // Model    let firstName: String    let lastName: String}protocol GreetingView: class {    func setGreeting(greeting: String)}protocol GreetingViewPresenter {    init(view: GreetingView, person: Person)    func showGreeting()}class GreetingPresenter : GreetingViewPresenter {    unowned let view: GreetingView    let person: Person    required init(view: GreetingView, person: Person) {        self.view = view        self.person = person    }    func showGreeting() {        let greeting = "Hello" + " " + self.person.firstName + " " + self.person.lastName        self.view.setGreeting(greeting)    }}class GreetingViewController : UIViewController, GreetingView {    var presenter: GreetingViewPresenter!    let showGreetingButton = UIButton()    let greetingLabel = UILabel()    override func viewDidLoad() {        super.viewDidLoad()        self.showGreetingButton.addTarget(self, action: "didTapButton:", forControlEvents: .TouchUpInside)    }    func didTapButton(button: UIButton) {        self.presenter.showGreeting()    }    func setGreeting(greeting: String) {        self.greetingLabel.text = greeting    }    // layout code goes here}// Assembling of MVPlet model = Person(firstName: "David", lastName: "Blaine")let view = GreetingViewController()let presenter = GreetingPresenter(view: view, person: model)view.presenter = presenter