I'm doing code for state maintainance So what happens that ,my currnet view will be appear after pressing homme now in this view i want to add backbutton

in normal condition i'm adding button like this,

[self navigationItem].title = NSLocalizedString(@"login_title",@"");    


UIBarButtonItem *backItem = [[UIBarButtonItem alloc] initWithTitle:NSLocalizedString(@"back_button",@" ") style:UIBarButtonItemStylePlain target:self action:@selector(done)];     
[self.navigationItem setHidesBackButton:YES animated:YES];    

self.navigationItem.leftBarButtonItem = backItem;     
[backItem release];