wellcomeScreen.swift

import UIKit

final class SignUpViewController: UIViewController {
    static let storybuardId = "signUpViewController"

    @IBOutlet private weak var signUpButton: UIButton?

    override func viewDidLoad() {
        super.viewDidLoad()
        setupUI()
    }

    override func viewWillAppear(animated: Bool) {
        super.viewWillAppear(animated)
        navigationController?.navigationBarHidden = true

    }

    override func viewWillDisappear(animated: Bool) {
        super.viewWillDisappear(animated)
        navigationController?.navigationBarHidden = false
    }
}

extension SignUpViewController {
    //MARK:- Action Buttons
    @IBAction func singUpButtonTapped(sender: UIButton) {
    }

    @IBAction func logInButtontapped(sender: UIButton) {
        guard let loginViewController = storyboard?.instantiateViewControllerWithIdentifier(LoginViewController.storyboardId) else {
            return
        }
        navigationController?.pushViewController(loginViewController, animated: true)
    }
}

private extension SignUpViewController {
    //MARK:- UI Setup
    func setupUI() {
        signUpButton?.layer.borderColor = UIColor.whiteColor().CGColor
        signUpButton?.layer.borderWidth = 1
        signUpButton?.layer.cornerRadius = (signUpButton?.bounds.height ?? 0) / 2
    }
}