ios - how to add any rootViewController to window in UIsplitViewController -

i have app in using splitviewcontroller code works fine want when add rootviewcontroller window when app loads loginviewcontroller , when login successfull add rootviewcontroll in window splitviewcontroller notification works fine problem when in spitviewcontroller , clcik of cell opens detailviewcontroller , detailviewcontroller if move loginscreen , again add rootviewcontroller window shows me secondviewcontroller of splitviewcontroller want whenever add rootviewcontroller window should fresh loads

 -(void)actionnotificationdata:(nsnotification *)notification {     jani=@"no";     self.window.rootviewcontroller=splitviewcontroller;     } 

image description here first time.