iOS adds segment to Nav

/* Initialize the navigation button */{credits = [[[Uibarbuttonitem alloc] initwithtitle:@ "credits"                          Style:uibarbuttonitemstyleplain target:appdelegate              Action: @selector (credits)] autorelease];               Self.navigationItem.rightBarButtonItem = credits;              Segmentedcontrol = [[Uisegmentedcontrol alloc] initwithitems:nil];               Segmentedcontrol.segmentedcontrolstyle = Uisegmentedcontrolstylebar;              [Segmentedcontrol Insertsegmentwithtitle: @ "Bunnies" atindex:0 Animated:no];               [Segmentedcontrol insertsegmentwithtitle: @ "ponies" atindex:1 animated:no]; [Segmentedcontrol addtarget:self Action: @selector (controlpressed:) forcontrolevents:uicontroleve               Ntvaluechanged]; Self.navigationItem.titleView = SegmEntedcontrol;          Segmentedcontrol.selectedsegmentindex = 0;  } return self;  }-(void) controlpressed: (ID) Sender {[Self setpage];           }-(void) setpage {int index = Segmentedcontrol.selectedsegmentindex; if (index = = 0) {Textview.text = @ "OMG bunnies!";}          else {textview.text = @ "OMG ponies";   }  }

　　

iOS adds segment to Nav