ios - How do I get the Storyboard name? -

im creating new design app have created new story board. need support older design now, designing upcoming 1 on fly. reusing classes , viewcontrollers. there way check storyboard name in classes? example, if 'main' storyboard have normal left bar button item, if 'newdesign' 'x'?

i cant find way 'uistoryboard' name?

for example in pseudocode:

if(self.storyboard.name isequaltostring: @"main"){   }else{  } 

how this?

uistoryboard * storyboard1 = self.storyboard; nsstring *name=[storyboard1 valueforkey:@"name"];  nslog(@"%@",name); 

another approach check restoration id of view controllers. how that?