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


i have viewcontrollers, , don't use navigationcontroller. how can visible view controller in app delegate methods (e.g. applicationwillresignactive)?

i know how nsnotification, think it's wrong way.

this should 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]; }

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