my question is like that

My 5 th view is Acontroller and it has 1 UIButton.when i click on this UIButton my Bcontroller's view opens.this operation wrks perfectly.

but i'm actually doing state maintainanace.when i reach to 5 th view of Acontroller.after that i press home button and then when i again click on application as per my state maintainance code 5 th view of Acontroller opens .but when i click on it's UIButton Bcontroller's view not open.why

A code of UIButton is as below

[self.navigationController pushViewController:bcontroller animated:YES]; bcontroller is nothing but object of Bcontroller