public override void Show(MvxViewModelRequest request)
{
//all backstack manipulations should be done BEFORE creating and displaying new view/viewmodel
var clearBackStack = request.ParameterValues != null && request.ParameterValues.ContainsKey("clearBack");
var goBackToView = request.ParameterValues != null && request.ParameterValues.ContainsKey("goBack");
if (goBackToView)
{
var requestedViewType = ViewsContainer.GetViewType(request.ViewModelType);
var currentBackStack = MasterNavigationController.ViewControllers;
var viewControllerToJump = currentBackStack.FirstOrDefault(v => v.GetType() == requestedViewType);
if (viewControllerToJump != null)
{
MasterNavigationController.PopToViewController(viewControllerToJump, true);
return;
}
}
var controller = this.CreateViewControllerFor(request);
var viewController = (IMvxIosView)controller;
if (viewController == null)
{
throw new MvxException("Passed in IMvxIosView is not a UIViewController");
}
base.Show(viewController);
//prevent animations fail - delete after showing new page
if (clearBackStack)
{
MasterNavigationController.SetViewControllers(new UIViewController[] { controller as UIViewController }, false);
}
}
public override void Show(MvxViewModelRequest request)
{
if (request.PresentationValues != null)
{
var viewCreator = GetViewCreator();
// More info at:
// - http://gregshackles.com/presenters-in-mvvmcross-using-presentation-values/
// - https://gist.github.com/gshackles/5735595
if (request.PresentationValues.ContainsKey(PresentationBundleFlagKeys.CLEAR_STACK))
{
var nextViewController = (UIViewController)viewCreator.CreateView(request);
if (MasterNavigationController.TopViewController.GetType() != nextViewController.GetType())
{
MasterNavigationController.PopToRootViewController(false);
MasterNavigationController.PushViewController(nextViewController, false);
}
return;
}
else if (request.PresentationValues.ContainsKey(PresentationBundleFlagKeys.MAKE_IT_THE_FIRST_ONE))
{
MasterNavigationController.SetViewControllers(new UIViewController[] { }, false);
}
else if (request.PresentationValues.ContainsKey(PresentationBundleFlagKeys.BACK_OR_IN_PLACE))
{
var nextViewController = (UIViewController)viewCreator.CreateView(request);
var existingViewController =
MasterNavigationController.ViewControllers.FirstOrDefault(
vc => vc.GetType() == nextViewController.GetType() && vc != CurrentTopViewController);
if (existingViewController != null)
{
MasterNavigationController.PopToViewController(existingViewController, true);
}
else
{
var transition = new CATransition
{
Duration = 0.3,
Type = CAAnimation.TransitionPush,
Subtype = CAAnimation.TransitionFade
};
MasterNavigationController.PopViewController(false);
MasterNavigationController.View.Layer.AddAnimation(transition, null);
MasterNavigationController.PushViewController(nextViewController, false);
}
return;
}
}
base.Show(request);
}
private bool PopViewControllersUntilViewModel(Type viewModelType)
{
for (int i = MasterNavigationController.ViewControllers.Length - 1; i >= 0; i--)
{
if (MasterNavigationController.ViewControllers[i] is MvxViewController mvc)
{
if (mvc.ViewModel.GetType() == viewModelType)
{
MasterNavigationController.PopToViewController(mvc, false);
return(true);
}
}
}
return(false);
}