ios - How to determine which view controller is currently active/the one displaying a view? -

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in app queueing local notifications, when fire must present modal view. trouble have numerous view controllers 1 of active , 1 needs present modal view controller. how can determine 1 in use?

i setting navigation controller windows root view controller, , can push number of other view controllers, of them may presenting view controller modally. must work on ios 4 , 5.

i have lot of view controllers avoid putting code in each of them each check if top one.

you can @ navigation controller's topviewcontroller property find out controller @ top of stack. 1 view displayed.

since may presenting modal view controller, you'll more interested in visibleviewcontroller property, give controller current view whether presented modally or pushed onto navigation stack.


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