protected void CloseSplitViewController()
{
if (SplitViewController == null)
{
return;
}
foreach (var item in (SplitViewController as UISplitViewController).ViewControllers)
{
item.DidMoveToParentViewController(null);
}
SplitViewController = null;
}
protected virtual void ShowRootViewController(
UIViewController viewController,
MvxRootPresentationAttribute attribute,
MvxViewModelRequest request)
{
// check if viewController is a TabBarController
if (viewController is IMvxTabBarViewController tabBarController)
{
TabBarViewController = tabBarController;
SetWindowRootViewController(viewController);
CloseMasterNavigationController();
CloseModalNavigationController();
CloseSplitViewController();
return;
}
// check if viewController is a SplitViewController
if (viewController is IMvxSplitViewController splitController)
{
SplitViewController = splitController;
SetWindowRootViewController(viewController);
CloseMasterNavigationController();
CloseModalNavigationController();
CloseTabBarViewController();
return;
}
// check if viewController is trying to initialize a navigation stack
if (attribute.WrapInNavigationController)
{
viewController = CreateNavigationController(viewController);
MasterNavigationController = viewController as MvxNavigationController;
SetWindowRootViewController(viewController);
CloseModalNavigationController();
CloseTabBarViewController();
CloseSplitViewController();
return;
}
// last scenario: display the plain viewController as root
SetWindowRootViewController(viewController);
}
protected virtual void ShowRootViewController(
UIViewController viewController,
MvxRootPresentationAttribute attribute,
MvxViewModelRequest request)
{
// first set the new RootViewController
if (attribute.WrapInNavigationController)
{
// viewController is initializing a navigation stack
var navigationController = CreateNavigationController(viewController);
MasterNavigationController = navigationController as MvxNavigationController;
SetWindowRootViewController(navigationController);
}
else
{
// set plain ViewController as root
SetWindowRootViewController(viewController);
CloseMasterNavigationController();
}
// check if viewController is a TabBarController
if (viewController is IMvxTabBarViewController tabBarController)
{
TabBarViewController = tabBarController;
CloseSplitViewController();
}
// check if viewController is a SplitViewController
else if (viewController is IMvxSplitViewController splitController)
{
SplitViewController = splitController;
CloseTabBarViewController();
}
else
{
CloseTabBarViewController();
CloseSplitViewController();
}
// always clean ModalViewControllers when setting a new root
CleanupModalViewControllers();
}
protected void CloseSplitViewController()
{
if (SplitViewController == null)
{
return;
}
if (SplitViewController is UISplitViewController splitController &&
splitController.ViewControllers != null)
{
foreach (var item in splitController.ViewControllers)
{
item.DidMoveToParentViewController(null);
}
}
SplitViewController = null;
}
protected virtual Task <bool> CloseSplitViewController()
{
if (SplitViewController == null)
{
return(Task.FromResult(true));
}
if (SplitViewController is UISplitViewController splitController &&
splitController.ViewControllers != null)
{
foreach (var item in splitController.ViewControllers)
{
item.DidMoveToParentViewController(null);
}
}
SplitViewController = null;
return(Task.FromResult(true));
}
protected virtual void ShowRootViewController(
UIViewController viewController,
MvxRootPresentationAttribute attribute,
MvxViewModelRequest request)
{
// check if viewController is a TabBarController
if (viewController is IMvxTabBarViewController tabBarController)
{
TabBarViewController = tabBarController;
// set root
SetupWindowRootNavigation(viewController, attribute);
CleanupModalViewControllers();
CloseSplitViewController();
return;
}
// check if viewController is a SplitViewController
if (viewController is IMvxSplitViewController splitController)
{
SplitViewController = splitController;
// set root
SetupWindowRootNavigation(viewController, attribute);
CleanupModalViewControllers();
CloseTabBarViewController();
return;
}
// set root initiating stack navigation or just a plain controller
SetupWindowRootNavigation(viewController, attribute);
CleanupModalViewControllers();
CloseTabBarViewController();
CloseSplitViewController();
}
protected virtual async Task <bool> ShowRootViewController(
UIViewController viewController,
MvxRootPresentationAttribute attribute,
MvxViewModelRequest request)
{
// check if viewController is a TabBarController
if (viewController is IMvxTabBarViewController tabBarController)
{
TabBarViewController = tabBarController;
// set root
SetupWindowRootNavigation(viewController, attribute);
if (!await CloseModalViewControllers())
{
return(false);
}
if (!await CloseSplitViewController())
{
return(false);
}
return(true);
}
if (viewController is IMvxPageViewController pageViewController)
{
PageViewController = pageViewController;
// set root
SetupWindowRootNavigation(viewController, attribute);
if (!await CloseModalViewControllers())
{
return(false);
}
if (!await CloseSplitViewController())
{
return(false);
}
return(true);
}
// check if viewController is a SplitViewController
if (viewController is IMvxSplitViewController splitController)
{
SplitViewController = splitController;
// set root
SetupWindowRootNavigation(viewController, attribute);
if (!await CloseModalViewControllers())
{
return(false);
}
if (!await CloseTabBarViewController())
{
return(false);
}
return(true);
}
// set root initiating stack navigation or just a plain controller
SetupWindowRootNavigation(viewController, attribute);
if (!await CloseModalViewControllers())
{
return(false);
}
if (!await CloseTabBarViewController())
{
return(false);
}
if (!await CloseSplitViewController())
{
return(false);
}
return(true);
}
