checkPassword.swift

    func checkPassword() {
        if typePassword == correctPassword {
            let controller = UIAlertController(title: "Correct", message: "Welcome back!", preferredStyle: .alert)
            let action = UIAlertAction(title: "OK", style: .default) { (_) in
                self.reset()
            }
            controller.addAction(action)
            present(controller, animated: true, completion: nil)
        } else {
            let controller = UIAlertController(title: "Wrong", message: "Please try again!", preferredStyle: .alert)
            let action = UIAlertAction(title: "OK", style: .cancel, handler: nil)
            controller.addAction(action)
            present(controller, animated: true, completion: reset)
        }
    }