Attempt to present * on * whose view is not in the window hierarchy

Question

I\'m trying to make a modal view controller in my app delegate (I created a function called showLoginView). But whenever I try to call it I get a warning in XCode:

Answer 1

UIViewController *activeController = [UIApplication sharedApplication].keyWindow.rootViewController;
if ([activeController isKindOfClass:[UINavigationController class]])
{
   activeController = [(UINavigationController*) activeController visibleViewController];
}
else if (activeController.modalViewController)
{
    activeController = activeController.modalViewController;
}
[activeController presentModalViewController:vc animated:YES];