protected virtual bool CloseChildViewController(IMvxViewModel viewModel, MvxChildPresentationAttribute attribute)
{
// if there are modals presented
if (ModalViewControllers.Any())
{
foreach (var modalNav in ModalViewControllers.Where(v => v is UINavigationController))
{
if (TryCloseViewControllerInsideStack((UINavigationController)modalNav, viewModel))
{
return(true);
}
}
}
//if the current root is a TabBarViewController, delegate close responsibility to it
if (TabBarViewController != null && TabBarViewController.CloseChildViewModel(viewModel))
{
return(true);
}
if (SplitViewController != null && SplitViewController.CloseChildViewModel(viewModel))
{
return(true);
}
// if the current root is a NavigationController, close it in the stack
if (MasterNavigationController != null && TryCloseViewControllerInsideStack(MasterNavigationController, viewModel))
{
return(true);
}
return(false);
}
protected virtual ValueTask <bool> CloseChildViewController(IMvxViewModel viewModel, MvxChildPresentationAttribute?attribute)
{
if (ModalViewControllers.Any())
{
foreach (var navController in ModalViewControllers.Where(v => v is UINavigationController))
{
if (TryCloseViewControllerInsideStack((UINavigationController)navController, viewModel))
{
return(new ValueTask <bool>(true));
}
}
}
if (TabBarViewController != null && TabBarViewController.CloseChildViewModel(viewModel))
{
return(new ValueTask <bool>(true));
}
if (MasterNavigationController != null && TryCloseViewControllerInsideStack(MasterNavigationController, viewModel))
{
return(new ValueTask <bool>(true));
}
return(new ValueTask <bool>(false));
}
public override void Close(IMvxViewModel toClose)
{
// check if there is a modal presented
if (ModalViewControllers.Any() && CloseModalViewController(toClose))
{
return;
}
// if the current root is a TabBarViewController, delegate close responsibility to it
if (TabBarViewController != null && TabBarViewController.CloseChildViewModel(toClose))
{
return;
}
// if the current root is a SplitViewController, delegate close responsibility to it
if (SplitViewController != null && SplitViewController.CloseChildViewModel(toClose))
{
return;
}
// if the current root is a NavigationController, close it in the stack
if (MasterNavigationController != null && TryCloseViewControllerInsideStack(MasterNavigationController, toClose))
{
return;
}
MvxTrace.Warning($"Could not close ViewModel type {toClose.GetType().Name}");
}
protected virtual void Close(IMvxViewModel toClose)
{
// check if toClose is a modal ViewController
if (Window.RootViewController.PresentedViewController != null)
{
UIViewController viewController;
// the presented ViewController might be a NavigationController as well
var navigationController = Window.RootViewController.PresentedViewController as UINavigationController;
viewController = navigationController != null
? navigationController.TopViewController
: Window.RootViewController.PresentedViewController;
var mvxView = viewController.GetIMvxIosView();
if (mvxView.ViewModel == toClose)
{
Window.RootViewController.DismissViewController(true, null);
return;
}
}
// check if ViewModel is shown inside TabBarViewController
// if so, the TabBarViewController takes care of it
if (TabBarViewController != null)
{
TabBarViewController.CloseChildViewModel(toClose);
return;
}
// close ViewModel shown inside NavigationController
if (NavigationController.TopViewController.GetIMvxIosView().ViewModel == toClose)
{
NavigationController.PopViewController(true);
}
else
{
ClosePreviousController(toClose);
}
}