UINavigation Bar Problem

hi

i am using sdk4.2 version

in my app at first the navigation bar and the whole design perfect when m going forward side of run. but when i press back button of navigation controller the whole design go down by 48pixel. it create 48 pixel gap between navigation and content.

what's the problem? i don't know m facing first time. even am use ViewDidAppear method to set do not h开发者_如何学Cidden navigaion bar.

Please ensure that setTranslucent is set as NO in all classes. As shown below:

    [self.navigationController.navigationBar setTranslucent:NO];