Custom MvxTouchViewPresenter not showing subsequent ViewModel - xamarin.ios

Question

I've written a custom MvxTouchViewPresenter that allows me to show either a SlidingPanel (RootView), or show a MvxTabBarViewController (AuthView).
When my app launches,
if I tell it to load the TabBarView (AuthView), it works as expected.
if I tell it to load the SlidingPanelView (RootView), it also works as expected.
The problem occurs when I load the AuthView and then try to ShowViewModel<RootView>()... basically what happens in this scenario is that I stay at the AuthView, even though I see the CustomPresenter.Show() method has run appropriately.
Here's the method
public override void Show(MvxViewModelRequest request)
{
var viewController = (UIViewController)Mvx.Resolve<IMvxTouchViewCreator>().CreateView(request);
RootController = new UIViewController();
// This needs to be a Tab View
if (request.ViewModelType == typeof(AuthViewModel))
{
_navigationController = new EmptyNavController(viewController);
RootController.AddChildViewController(_navigationController);
RootController.View.AddSubview(_navigationController.View);
}
if (request.ViewModelType == typeof(RootViewModel))
{
_navigationController = new SlidingPanelsNavController(viewController);
RootController.AddChildViewController(_navigationController);
RootController.View.AddSubview(_navigationController.View);
AddSlidingPanel<NavigationFragment>(PanelType.LeftPanel, 280);
}
base.Show(request);
}
And here's a Gist of the complete class
What am I missing in trying to make this work appropriately?

Answer 1

not sure if what I've done is "correct" but it's working for now. I'm still very much open to better answers.
What I've done in order to simply move on from this problem is add a call to SetWindowRootViewController(_navigationController); just before I call base.Show(request)
public override void Show(MvxViewModelRequest request)
{
_navigationController = null;
var viewController = (UIViewController)Mvx.Resolve<IMvxTouchViewCreator>().CreateView(request);
RootController = new UIViewController();
// This needs to be a Tab View
if (request.ViewModelType == typeof(AuthViewModel))
{
_navigationController = new EmptyNavController(viewController);
RootController.AddChildViewController(_navigationController);
RootController.View.AddSubview(_navigationController.View);
}
else if (request.ViewModelType == typeof (RootViewModel))
{
_navigationController = new SlidingPanelsNavController(viewController);
RootController.AddChildViewController(_navigationController);
RootController.View.AddSubview(_navigationController.View);
AddSlidingPanel<NavigationFragment>(PanelType.LeftPanel, 280);
}
else
{
throw new Exception("They View Type you're trying to show isn't currently supported.");
}
// RIGHT HERE
SetWindowRootViewController(_navigationController);
base.Show(request);
}