protected void CleanupModalViewControllers()
{
while (ModalViewControllers.Any())
{
CloseModalViewController(ModalViewControllers.LastOrDefault());
}
}
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> CloseModalViewController(IMvxViewModel viewModel)
{
if (ModalViewControllers == null || !ModalViewControllers.Any())
{
return(new ValueTask <bool>(false));
}
var modal = ModalViewControllers
.FirstOrDefault(v => v is IMvxTvosView && v.GetIMvxTvosView().ViewModel == viewModel);
if (modal != null)
{
return(CloseModalViewController(modal));
}
UIViewController viewController = null;
foreach (var vc in ModalViewControllers.Where(v => v is UINavigationController))
{
var rootViewController = ((UINavigationController)vc).ViewControllers.FirstOrDefault();
if (rootViewController != null && rootViewController.GetIMvxTvosView().ViewModel == viewModel)
{
viewController = vc;
break;
}
}
if (viewController != null)
{
return(CloseModalViewController(viewController));
}
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($"Could not close ViewModel type {toClose.GetType().Name}");
}
protected virtual ValueTask <bool> ShowChildViewController(UIViewController viewController,
MvxChildPresentationAttribute attribute,
MvxViewModelRequest request)
{
if (viewController is MvxSplitViewController)
{
throw new MvxException("A SplitViewController can't be present in a child. Consider using a Root instead.");
}
if (ModalViewControllers.Any())
{
if (ModalViewControllers.LastOrDefault() is UINavigationController navigationController)
{
PushViewControllerIntoStack(navigationController, viewController, attribute.Animated);
return(new ValueTask <bool>(true));
}
else
{
throw new MvxException($"Trying to show View type: {viewController.GetType().Name} as child, but there is currently a plain modal view presented!");
}
}
if (TabBarViewController != null && TabBarViewController.ShowChildView(viewController))
{
return(new ValueTask <bool>(true));
}
if (MasterNavigationController != null)
{
PushViewControllerIntoStack(MasterNavigationController, viewController, attribute.Animated);
return(new ValueTask <bool>(true));
}
throw new MvxException($"Trying to show View type: {viewController.GetType().Name} as child, but there is no current stack!");
}
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));
}
protected virtual Task <bool> CloseModalViewController(IMvxViewModel toClose, MvxModalPresentationAttribute attribute)
{
if (ModalViewControllers == null || !ModalViewControllers.Any())
{
return(Task.FromResult(false));
}
// check for plain modals
var modalToClose = ModalViewControllers.FirstOrDefault(v => v is IMvxIosView && v.GetIMvxIosView().ViewModel == toClose);
if (modalToClose != null)
{
return(CloseModalViewController(modalToClose, attribute));
}
// check for modal navigation stacks
UIViewController controllerToClose = null;
foreach (var vc in ModalViewControllers.Where(v => v is UINavigationController))
{
var root = ((UINavigationController)vc).ViewControllers.FirstOrDefault();
if (root != null && root.GetIMvxIosView().ViewModel == toClose)
{
controllerToClose = vc;
break;
}
}
if (controllerToClose != null)
{
return(CloseModalViewController(controllerToClose, attribute));
}
return(Task.FromResult(false));
}
public virtual void CloseModalViewControllers()
{
while (ModalViewControllers.Any())
{
CloseModalViewController(ModalViewControllers.LastOrDefault(), new MvxModalPresentationAttribute());
}
}
protected async Task <bool> CloseModalViewControllers()
{
while (ModalViewControllers.Any())
{
if (!(await CloseModalViewController(ModalViewControllers.LastOrDefault())))
{
return(false);
}
}
return(true);
}
public virtual async Task <bool> CloseModalViewControllers()
{
while (ModalViewControllers.Any())
{
if (!(await CloseModalViewController(ModalViewControllers.LastOrDefault(), new MvxModalPresentationAttribute())))
{
return(false);
}
}
return(true);
}
protected override Task <bool> ShowChildViewController(
UIViewController viewController,
MvxChildPresentationAttribute attribute,
MvxViewModelRequest request)
{
if (viewController is IMvxSplitViewController)
{
throw new MvxException("A SplitViewController cannot be presented as a child. Consider using Root instead");
}
if (ModalViewControllers.Any())
{
if (ModalViewControllers.LastOrDefault() is UINavigationController modalNavController)
{
PushViewControllerIntoStack(modalNavController, viewController, attribute);
return(Task.FromResult(true));
}
throw new MvxException($"Trying to show View type: {viewController.GetType().Name} as child, but there is currently a plain modal view presented!");
}
if (TabBarViewController != null)
{
if (request.PresentationValues != null &&
request.PresentationValues.ContainsKey(Presenter.NavigationModeKey))
{
if (request.PresentationValues[Presenter.NavigationModeKey] == Presenter.ReplaceKey)
{
if (TabBarViewController is MainView mv)
{
mv.ReplaceTopChildViewModel(viewController);
return(Task.FromResult(true));
}
}
}
else
{
return(Task.FromResult(TabBarViewController.ShowChildView(viewController)));
}
}
if (MasterNavigationController != null)
{
PushViewControllerIntoStack(MasterNavigationController, viewController, attribute);
return(Task.FromResult(true));
}
throw new MvxException($"Trying to show View type: {viewController.GetType().Name} as child, but there is no current stack!");
}
protected virtual bool CloseModalViewController(IMvxViewModel toClose)
{
if (ModalViewControllers == null || !ModalViewControllers.Any())
{
return(false);
}
// check for plain modals
var modalToClose = ModalViewControllers.FirstOrDefault(v => v is IMvxIosView && v.GetIMvxIosView().ViewModel == toClose);
if (modalToClose != null)
{
CloseModalViewController(modalToClose);
return(true);
}
// check for modal navigation stacks
UIViewController controllerToClose = null;
foreach (var vc in ModalViewControllers.Where(v => v is UINavigationController))
{
var root = ((UINavigationController)vc).ViewControllers.FirstOrDefault();
if (root != null && root.GetIMvxIosView().ViewModel == toClose)
{
controllerToClose = root;
break;
}
}
if (controllerToClose != null)
{
CloseModalViewController(controllerToClose);
return(true);
}
return(false);
}
