class ViewController: UIViewController {

    private lazy var navItem: UINavigationItem = {
        let item = UINavigationItem(title: "Hello there")
        return item
    }()

    private lazy var navBar: UINavigationBar = {
        let bar = UINavigationBar(frame: CGRect(x: 0, y: 0, width: view.frame.size.width, height: 60))
        return bar
    }()


    // MARK: LifeCycle
    override func viewDidLoad() {
        super.viewDidLoad()
        setup()
    }

    // MARK: Functions
    private func setup() {
        navBar.tintColor = .white
        navBar.backgroundColor = .green
        view.addSubview(navBar)

        let doneItem = UIBarButtonItem(image: UIImage(systemName: "xmark"), style: .plain, target: self, action: #selector(back))
        doneItem.imageInsets = UIEdgeInsets.init(top: 16, left: 8, bottom: 20, right: 8);
        doneItem.tintColor = .black
        navItem.leftBarButtonItem = doneItem
        navBar.setItems([navItem], animated: false)


    }

    @objc func back() {

    }

}