using TabBarController in MVVM-C, coordinator for Tab Bar - swift

Question

I am using MVVM with coordinator pattern for navigation. Navigation is made with pushViewController. Tab Bar Controller is created in TabBarCoordinator class.
class TabBarCoordinator: NSObject, BaseCoordinator {
var rootViewController: UIViewController {
return tabBarController
}
var tabBarController: UITabBarController
var window: UIWindow
private let appDependency: AppDependency
var navigationController: NavigationController
private let navigationObserver: NavigationObserver
var childCoordinators: [BaseCoordinator] = []
var onDidFinish: (() -> Void)?
var topController: UIViewController {
if let lastChild = topCoordinator {
return lastChild.topController
}
var controller: UIViewController = navigationController
while let presentedController = controller.presentedViewController {
controller = presentedController
}
return controller
}
func start() {
let homeCoordinator = HomeCoordinator(navigationObserver: navigationObserver,
navigationController: navigationController,
appDependency: appDependency)
add(child: homeCoordinator)
homeCoordinator.start()
let ordersListCoordinator = OrdersListCoordinator(navigationController: navigationController,
navigationObserver: navigationObserver,
appDependency: appDependency,
filterStatus: nil)
add(child: ordersListCoordinator)
ordersListCoordinator.start()
tabBarController.navigationController?.navigationBar.isTranslucent = true
let homeVC = homeCoordinator.topController
homeVC.tabBarItem = UITabBarItem(title: "home", image: nil, selectedImage: nil)
let ordersListVC = ordersListCoordinator.topController
ordersListVC.tabBarItem = UITabBarItem(title: "orders", image: nil, selectedImage: nil)
let controllers = [homeVC, ordersListVC]
tabBarController.viewControllers = controllers.map { UINavigationController(rootViewController: $0) }
window.rootViewController = tabBarController
window.makeKeyAndVisible()
}
required init(window: UIWindow,
navigationObserver: NavigationObserver,
navigationController: NavigationController,
appDependency: AppDependency
) {
tabBarController = UITabBarController()
self.window = window
self.navigationController = navigationController
self.navigationObserver = navigationObserver
self.appDependency = appDependency
}
}
Here the code of func start() for HomeCoordinator class:
func start() {
guard let user = appDependency.userDataStore.authorizedUserInfo?.user else { return }
let viewModel = HomeViewModel(user: user)
viewModel.delegate = self
let homeViewController = HomeViewController(viewModel: viewModel)
viewController = homeViewController
navigationController.viewControllers = [homeViewController]
}
Tab bar Screenshot
Problems with tab bar:
isTranslucent doesn't hide navBar from TabbarController
the screen is black
views of tabBarItems are not shown, but you can still tap them and screens would change
the second vc is just black screen
Any ideas what's wrong with my TabBarCoordinator class? Thank you in advance