Reload UItabbarcontroller again from UIwindow

[sijo006]

I have a UItabbarcontroller which is loading with UIwindow.. I want to hide some tabs if user is not logged in.. so am removing it when application loads.i mean am removing the viewcontroller objects.. But after user logged in , i want to show the other tabs also. How i can do this ? Any other way to do this ? Plz help me .. Thanks in advance...

[sijo006]

Am answering to my own thread..Now am taking the elements of stack in an NSmutableArray and keeping .. and removing unwanted tabs from stack.. Wen i want old stack elements back, am replacing current stack with stored NSMUtablearray..in this way i solved my problem..