Swift - Open UIViewController from within slide-in menu - swift

Question

I have a slide-in menu that presents itself when I press the menu button in my navigation bar. Dismissing it can be accomplished by either tapping the background or the menu itself. Within this view I have several items, one of which is an user profile button. When I press this button, I want the menu to dismiss itself and then instantly open the user profile view controller. That's why I call handleDismiss() first and then set the view that needs to be opened
However, it keeps telling me that the view is not in the window hierarchy. I know what the problem is (view stack), but I somehow can't get it to work properly. How should I tackle this problem?
RootViewController -> HomeController (tabBar index 0) -> Slide-In Menu -> UserProfileController
Button to open the controller
profileCell.profileButton.addTarget(self, action: #selector(handleUserProfile(sender:)), for: .touchUpInside)
Functions
func handleDismiss() {
UIView.animate(withDuration: 0.5) {
self.blackView.alpha = 0
if let window = UIApplication.shared.keyWindow {
self.collectionView.frame = CGRect(x: 0, y: window.frame.height, width: self.collectionView.frame.width, height: self.collectionView.frame.height)
}
}
}
func handleUserProfile(sender: UIButton) {
handleDismiss()
let userProfileController = UserProfileController()
openProfileController(userProfileController)
}
func openProfileController(_ controller: UIViewController) {
present(controller, animated: false, completion: nil)
}

Answer 1

I fixed the problem by setting a reference to the rootViewController in my menu.
HomeController
let menuLauncher = MenuLauncher()
func tappedMenu(sender: UIButton) {
menuLauncher.showMenu(self)
}
MenuController
func MenuLauncher() {
self.m_ParentViewController = nil
}
func showMenu(_ parentViewController: UIViewController) {
self.m_ParentViewController = parentViewController
collectionView.dataSource = self
collectionView.delegate = self
collectionView.register(MenuLauncherImageCell.self, forCellWithReuseIdentifier: cellIdImage)
collectionView.register(MenuLauncherInfoCell.self, forCellWithReuseIdentifier: cellIdInfo)
if let window = UIApplication.shared.keyWindow {
blackView.backgroundColor = UIColor(white: 0, alpha: 0.5)
blackView.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(handleDismiss)))
window.addSubview(blackView)
window.addSubview(collectionView)
collectionView.frame = CGRect(x: 0, y: window.frame.height, width: window.frame.width, height: 350)
blackView.frame = window.frame
blackView.alpha = 0
UIView.animate(withDuration: 0.5, delay: 0, usingSpringWithDamping: 1, initialSpringVelocity: 1, options: .curveEaseOut, animations: {
self.blackView.alpha = 1
self.collectionView.frame = CGRect(x: 0, y: window.frame.height - 350, width: self.collectionView.frame.width, height: self.collectionView.frame.height)
}, completion: nil)
}
}
func handleDismiss() {
UIView.animate(withDuration: 0.5) {
self.blackView.alpha = 0
if let window = UIApplication.shared.keyWindow {
self.collectionView.frame = CGRect(x: 0, y: window.frame.height, width: self.collectionView.frame.width, height: self.collectionView.frame.height)
}
}
}
func handleUserProfile(sender: UIButton) {
handleDismiss()
let userProfileController = UserProfileController()
self.m_ParentViewController?.present(userProfileController, animated: true, completion: nil)
}