How do I access my viewController from my appDelegate? iOS

Question

I have an iOS app I created as a \"view-based app\" in xCode. I have only one viewController, but it is displayed automatically, and I see no code that ties it to my appDel

Answer 1

If you want to get any other UIViewController, not just the rootViewController:

UIWindow *window=[UIApplication sharedApplication].keyWindow;
UIViewController *root = [window rootViewController];

UIStoryboard *storyboard = root.storyboard;
CustomViewController *vcc =(CustomViewController *) [storyboard instantiateViewControllerWithIdentifier:@"storyBoardID"];