public void ReplaceTopChildViewModel(UIViewController viewController)
{
if (SelectedIndex > 5 && (MoreNavigationController?.ViewControllers?.Any() ?? false))
{
var lastViewController = (MoreNavigationController.ViewControllers.Last()).GetIMvxIosView();
if (lastViewController != null)
{
MoreNavigationController.PopViewController(true);
return;
}
}
if (SelectedViewController is UINavigationController navController &&
navController.ViewControllers != null)
{
if (navController.ViewControllers.Any())
{
var newStack = navController.ViewControllers.Take(navController.ViewControllers.Length - 1)
.Concat(new[] { viewController }).ToArray();
navController.SetViewControllers(newStack, true);
}
else
{
navController.PushViewController(viewController, true);
}
}
}
public virtual bool ShowChildView(UIViewController viewController)
{
if (SelectedIndex > 5) // when more menu item is currently visible, selected index has value higher than 5
{
MoreNavigationController.PushViewController(viewController, true);
return(true);
}
var navigationController = SelectedViewController as UINavigationController;
// if the current selected ViewController is not a NavigationController, then a child cannot be shown
if (navigationController == null)
{
return(false);
}
navigationController.PushViewController(viewController, true);
return(true);
}
public virtual bool CloseChildViewModel(IMvxViewModel viewModel)
{
if (SelectedIndex > 5 && (MoreNavigationController?.ViewControllers?.Any() ?? false))
{
var lastViewController = (MoreNavigationController.ViewControllers.Last()).GetIMvxIosView();
if (lastViewController != null && lastViewController.ViewModel == viewModel)
{
MoreNavigationController.PopViewController(true);
return(true);
}
}
if (SelectedViewController is UINavigationController navController &&
navController.ViewControllers != null &&
navController.ViewControllers.Any())
{
// if the ViewModel to close if the last in the stack, close it animated
if (navController.TopViewController.GetIMvxIosView().ViewModel == viewModel)
{
navController.PopViewController(true);
return(true);
}
var controllers = navController.ViewControllers.ToList();
var controllerToClose = controllers.FirstOrDefault(vc => vc.GetIMvxIosView().ViewModel == viewModel);
if (controllerToClose != null)
{
controllers.Remove(controllerToClose);
navController.ViewControllers = controllers.ToArray();
return(true);
}
}
return(false);
}
