protected void OnPopToNewRoot(IPageViewModel viewModel, bool animated)
{
var pref = createPageFor(viewModel);
PageReferences.Clear();
PageReferences.Add(pref);
popToNewRootAsync(pref.View, animated);
}
async void updatePages()
{
if (_pages != null && _pages.Count > 0)
{
foreach (var pref in PageReferences.Where(p => !_pages.Contains(p.Model)).ToList())
{
PageReferences.Remove(pref);
}
if (new[] { this.Navigation.NavigationStack.FirstOrDefault(), this.Navigation.NavigationStack.LastOrDefault(), PageReferences.LastOrDefault()?.View }
.All(v => v == PageReferences.FirstOrDefault()?.View))
{
OnPopToRoot(Pages.LastOrDefault(), TransitionAnimationEnabled);
}
else
{
if (Navigation.NavigationStack.Count > 0)
{
var pref = createPageFor(Pages.LastOrDefault());
PageReferences.Clear();
PageReferences.Add(pref);
await popToNewRootAsync(pref.View, TransitionAnimationEnabled);
}
else
{
OnPushViewModel(Pages.LastOrDefault(), TransitionAnimationEnabled);
}
}
}
else
{
//At least on page should be displayed
PageReferences.Clear();
var blankPage = new ContentPage {
BackgroundColor = Color.Transparent
};
if (Navigation.NavigationStack.Count > 0)
{
await popToNewRootAsync(blankPage, TransitionAnimationEnabled);
}
else
{
await PushAsync(blankPage, TransitionAnimationEnabled);
}
}
}
