Sample MVP Architecture

MVP is an architectural pattern, a derivation of the Model–View–Controller. It's represented by three distinct components: Model, View and the Presenter. It was engineered to facilitate automated unit testing and improve the separation of concerns in presentation logic.

• Model is an interface responsible for the domain data (to be displayed or otherwise acted upon in the GUI)
• View is responsible for the presentation layer (GUI)
• Presenter is the "middle-man" between Model and View. It reacts to the user’s actions performed on the View, retrieves data from the Model, and formats it for display in the View.

My MVP project structure

UserDelegate.swift.

Defining the model of methods that adapt to a particular functionality task.

protocol UserDelegate: NSObjectProtocol {
    func showProgress()
    func hideProgress()
    func signinDidSucceed()
    func signinDidFailed(message: String)
}

UserPresenter.swift.

Retrieves data from the Model, and formats it for display in the View.

class UserPresenter {
    weak var delegate: UserDelegate?

    init(delegate: UserDelegate) {
        self.delegate = delegate
    }

    func register(username: String, password: String) {
        self.delegate?.showProgress()
        if username.isEmpty {
            print("email can't be blank")
            self.delegate?.signinDidFailed(message: "email can't be blank")
        }
        let delay = DispatchTime.now() + Double(Int64(Double(NSEC_PER_SEC)*2)) / Double(NSEC_PER_SEC)

        DispatchQueue.main.asyncAfter(deadline: delay) {
            self.delegate?.hideProgress()
            self.delegate?.signinDidSucceed()
        }
    }
}

ViewController.swift

A container view controller embeds the content of other view controllers into its root view.

    class ViewController: UIViewController {
        // MARK: - IBOutlets

        @IBOutlet var usernameTextFild: UITextField!
        @IBOutlet var passwordTextField: UITextField!
        @IBOutlet weak var spinner: UIActivityIndicatorView!
        @IBOutlet weak var signinButton: UIButton!

        // MARK: - �Properties

        var userPresenter: UserPresenter!

        // MARK: - �viewDidLoad

        override func viewDidLoad() {
            super.viewDidLoad()
            // Do any additional setup after loading the view.
            self.userPresenter = UserPresenter(delegate: self)
            guard let spinner = self.spinner else { return }
            spinner.hidesWhenStopped = true
        }

        // MARK: - IBActions
        @IBAction func buttonSignInDidTap() {
            guard let presenter = userPresenter else { return }
            guard let username = usernameTextFild.text else { return }
            guard let password = passwordTextField.text else { return }
            presenter.register(username: username, password: password)
        }
    }
    extension ViewController: UserDelegate {
        func signinDidSucceed() {
            signinButton.setTitle("Success", for: .normal)
            signinButton.setTitleColor(.green, for: .normal)
            usernameTextFild.text = ""
            passwordTextField.text = ""
        }

        func signinDidFailed(message: String) {
            usernameTextFild.placeholder = message
        }

        func showProgress() {
            guard let spinner = self.spinner else { return }
            spinner.startAnimating()
        }

        func hideProgress() {
            guard let spinner = self.spinner else { return }
            spinner.stopAnimating()
        }

    }

Security Policy

Supported Versions

Use this section to tell people about which versions of your project are currently being supported with security updates.

Version	Supported
5.0.x	✅

Reporting a Vulnerability

Use this section to tell people how to report a vulnerability.

Tell them where to go, how often they can expect to get an update on a reported vulnerability, what to expect if the vulnerability is accepted or declined, etc.