Question

I’m implementing push notification and i’m managing it when user is using app. So an alert view appear and on view click it must redirect to an uiview. now if user is showing that uiview when alert is coming how can i know the uiview on top? how can i update the uiview current? Alert is shown in application delegate in the metod didReceiveRemoteNotification.
Thankss

EDIT:
i want to do something like this:

UiviewController current* = [delegate getCurrentView];
if(current.toString=="NotificationView"){
   [current update:notificationText];
}else{
   saveNotification;
   goToNotificationView;
}

Answer 1

I think most probably you have a UINavigationController in your main window (it can be a UITabBarController,etc), but if you have a UINavigationController in your main window then you can check the top view controller of your UINavigationController by using [self.navigationController topViewController]; or you can also check for UINavigationController‘s viewControllers stack that returns an array of all view controller’s you pushed in UINavigationController and can get the last object of that array which is your top view by using [[self.navigationController viewControllers] lastObject]; .

If you have a UITabBarController in your main window , then you can get the instance of UINavigationController (if its there) by using [[self.tabbarcontroller viewControllers] objectAtIndex:[self.tabbarcontroller selectedIndex]]; and can do the above steps to get the top view.