protected virtual void ShowModalViewController(
UIViewController viewController,
MvxModalPresentationAttribute attribute,
MvxViewModelRequest request)
{
// setup modal based on attribute
if (attribute.WrapInNavigationController)
{
viewController = CreateNavigationController(viewController);
}
viewController.ModalPresentationStyle = attribute.ModalPresentationStyle;
viewController.ModalTransitionStyle = attribute.ModalTransitionStyle;
if (attribute.PreferredContentSize != default(CGSize))
{
viewController.PreferredContentSize = attribute.PreferredContentSize;
}
// Check if there is a modal already presented first. Otherwise use the window root
var modalHost = ModalViewControllers.LastOrDefault() ?? _window.RootViewController;
modalHost.PresentViewController(
viewController,
attribute.Animated,
null);
ModalViewControllers.Add(viewController);
}
protected void CleanupModalViewControllers()
{
while (ModalViewControllers.Any())
{
CloseModalViewController(ModalViewControllers.LastOrDefault());
}
}
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 bool CloseModalViewController(IMvxViewModel toClose)
{
// check if there is a modal stack presented
if (ModalViewControllers.LastOrDefault() is UINavigationController modalNavController)
{
if (TryCloseViewControllerInsideStack(modalNavController, toClose))
{
// First() is the RootViewController of the stack. If it is being closed, then remove the nav stack
if (modalNavController.ViewControllers.First().GetIMvxIosView().ViewModel == toClose)
{
CloseModalViewController(modalNavController);
}
return(true);
}
}
else
{
// close any plain modal presented
var last = ModalViewControllers.Last();
if (last.GetIMvxIosView().ViewModel == toClose)
{
CloseModalViewController(last);
return(true);
}
}
return(false);
}
protected virtual Task <bool> ShowModalViewController(
UIViewController viewController,
MvxModalPresentationAttribute attribute,
MvxViewModelRequest request)
{
// Content size should be set to a target view controller, not the navigation one
if (attribute.PreferredContentSize != default(CGSize))
{
viewController.PreferredContentSize = attribute.PreferredContentSize;
}
// setup modal based on attribute
if (attribute.WrapInNavigationController)
{
viewController = CreateNavigationController(viewController);
}
viewController.ModalPresentationStyle = attribute.ModalPresentationStyle;
viewController.ModalTransitionStyle = attribute.ModalTransitionStyle;
// Check if there is a modal already presented first. Otherwise use the window root
var modalHost = ModalViewControllers.LastOrDefault() ?? _window.RootViewController;
modalHost.PresentViewController(
viewController,
attribute.Animated,
null);
ModalViewControllers.Add(viewController);
return(Task.FromResult(true));
}
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!");
}
