/// <summary>
/// Called when the Activity has detected the user's press of the back key
/// </summary>
public static async void OnBackPressed()
{
await semaphore.WaitAsync();
try
{
var container = ContainerLocator.Container;
var popupNavigation = container.Resolve <IPopupNavigation>();
var appProvider = container.Resolve <IApplicationProvider>();
var topPage = PopupUtilities.TopPage(popupNavigation, appProvider);
var navService = container.Resolve <INavigationService>(PrismApplicationBase.NavigationServiceName);
if (navService is IPageAware pa)
{
pa.Page = topPage;
}
var parameters = new NavigationParameters();
parameters.AddInternalParameter("_NavigationSource", "BackButton");
await navService.GoBackAsync(parameters);
}
finally
{
semaphore.Release();
}
}
public static void HandleSystemGoBack(Page previousPage, Page currentPage)
{
var parameters = new NavigationParameters();
parameters.AddInternalParameter(KnownInternalParameters.NavigationMode, NavigationMode.Back);
OnNavigatedFrom(previousPage, parameters);
OnNavigatedTo(GetOnNavigatedToTargetFromChild(currentPage), parameters);
DestroyPage(previousPage);
}
public static NavigationParameters AddNavigationMode(this NavigationParameters parameters, NavigationMode mode)
{
parameters.AddInternalParameter(NavigationModeKey, mode);
return(parameters);
}
