UIViewController as rootViewController of UINavigationController causes root views buttons to move - swift4

Question

When I do this in AppDelegate:
window?.rootViewController = {
let mainController = MenuViewController()
return mainController
}()
I get this:
But when I do this in AppDelegate:
window?.rootViewController = {
let mainController = UINavigationController(rootViewController: MenuViewController())
return mainController
}()
I get this:
Why and how do I fix? Please specify which information if more information is needed.
Here is the MenuView code that lays out the buttons manually and also sets up the properties of the buttons:
class MenuView: UIView {
//title
let titleLabel: UILabel = {
let label = UILabel()
label.text = "Survive The Attackers!!"
label.backgroundColor = UIColor.white
return label
}()
//set up buttons
let newGameButton: UIButton = {
let button = UIButton()
button.translatesAutoresizingMaskIntoConstraints = false
button.setTitle("New Game", for: .normal)
button.setTitleColor(UIColor.black, for: .normal)
button.backgroundColor = UIColor.white
button.layer.borderWidth = 2.0;
button.layer.borderColor = UIColor.black.cgColor
return button
}()
let resumeButton: UIButton = {
let button = UIButton()
button.translatesAutoresizingMaskIntoConstraints = false
button.setTitle("Resume Game", for: .normal)
button.setTitleColor(UIColor.black, for: .normal)
button.backgroundColor = UIColor.white
button.layer.borderWidth = 2.0;
button.layer.borderColor = UIColor.black.cgColor
return button
}()
let highScoresButton: UIButton = {
let button = UIButton()
button.translatesAutoresizingMaskIntoConstraints = false
button.setTitle("High Scores", for: .normal)
button.setTitleColor(UIColor.black, for: .normal)
button.backgroundColor = UIColor.white
button.layer.borderWidth = 2.0;
button.layer.borderColor = UIColor.black.cgColor
return button
}()
//add subviews and initialize the view
override init(frame: CGRect){
super.init(frame: frame)
self.backgroundColor = UIColor(patternImage: UIImage(named: "background1.png")!)
addSubview(titleLabel)
addSubview(newGameButton)
addSubview(resumeButton)
addSubview(highScoresButton)
}
required init?(coder aDecoder: NSCoder) {
fatalError("It's Apple. What did you expect?")
}
//manually layout the main menu
override func layoutSubviews() {
var cursor: CGPoint = .zero
let buttonHeight = CGFloat(40.0);
let buttonWidth = CGFloat(160.0);
let labelWidth = buttonWidth + 20;
let spacing = bounds.height/4
let titleY = 2/3 * spacing
cursor.y = titleY
cursor.x = bounds.width/2 - labelWidth/2
titleLabel.frame = CGRect(x: cursor.x, y: cursor.y, width: labelWidth, height: buttonHeight)
cursor.y = spacing
cursor.x = bounds.width/2 - buttonWidth/2
newGameButton.frame = CGRect(x: cursor.x, y: cursor.y, width: buttonWidth, height: buttonHeight)
cursor.y += spacing
resumeButton.frame = CGRect(x: cursor.x, y: cursor.y, width: buttonWidth, height: buttonHeight)
cursor.y += spacing
highScoresButton.frame = CGRect(x: cursor.x, y: cursor.y, width: buttonWidth, height: buttonHeight)
}
The buttons are laid out manually in layoutSubviews
Here is my MenuView controller code:
class MenuViewController: UIViewController {
var delegateID: String = UUIDVendor.vendUUID()
private var menuView: MenuView {
return view as! MenuView
}
init(){
super.init(nibName: nil, bundle: nil)
//edgesForExtendedLayout = .init(rawValue: 0)
}
required init?(coder aDecoder: NSCoder){
fatalError()
}
//loads the view in and sizes it correctly
override func loadView() {
view = MenuView()
//extendedLayoutIncludesOpaqueBars = false
}
override func viewDidLoad() {
menuView.newGameButton.addTarget(self, action: #selector(MenuViewController.newGameButtonTapped(button:)), for: .touchUpInside)
menuView.resumeButton.addTarget(self, action: #selector(MenuViewController.resumeGameButtonTapped(button:)), for: .touchUpInside)
menuView.highScoresButton.addTarget(self, action: #selector(MenuViewController.highScoreButtonTapped(button:)), for: .touchUpInside)
menuView.setNeedsLayout()
}
//fuction that handles the event when the newGameButton is tapped
#objc func newGameButtonTapped(button: UIButton){
//reset the data in the model somehow
navigationController?.pushViewController(GameViewController(), animated: true)
}
//function that handles the event when the resume game button is tapped
#objc func resumeGameButtonTapped(button: UIButton){
}
//function that handels the event when the high scores button is tapped
#objc func highScoreButtonTapped(button: UIButton){
}

Answer 1

call super for layoutSubviews
private var menuView: MenuView = {
let vw = MenuView()
return vw
}()
override func viewDidLoad() {
super.viewDidLoad()
view = MenuView() //Add here
//Your code
}
And remove loadView() from MenuViewController