How to get visible viewController from app delegate when using storyboard?

Question

I have some viewControllers, and I don't use NavigationController. How can I get visible view controller in app delegate methods (e.g. applicationWillResignActive)?

I know how to do it from NSNotification, but I think it's the wrong way.

Answer 1

This should do it for you:

- (void)applicationWillResignActive:(UIApplication *)application {     UIViewController *vc = [self visibleViewController:[UIApplication sharedApplication].keyWindow.rootViewController]; }  - (UIViewController *)visibleViewController:(UIViewController *)rootViewController {     if (rootViewController.presentedViewController == nil)     {         return rootViewController;     }     if ([rootViewController.presentedViewController isKindOfClass:[UINavigationController class]])     {         UINavigationController *navigationController = (UINavigationController *)rootViewController.presentedViewController;         UIViewController *lastViewController = [[navigationController viewControllers] lastObject];          return [self visibleViewController:lastViewController];     }     if ([rootViewController.presentedViewController isKindOfClass:[UITabBarController class]])     {         UITabBarController *tabBarController = (UITabBarController *)rootViewController.presentedViewController;         UIViewController *selectedViewController = tabBarController.selectedViewController;          return [self visibleViewController:selectedViewController];     }      UIViewController *presentedViewController = (UIViewController *)rootViewController.presentedViewController;      return [self visibleViewController:presentedViewController]; }