ios - Warning: Attempt to present * on * which is already presenting (null) -

this first application ios.

so have uiviewcontroller uitableview have integrated uisearchbar , uisearchcontroller in order filter tablecells display

override func viewdidload() {     menubar.delegate = self     table.datasource = self     table.delegate = self     let nib = uinib(nibname: "itemcelltableviewcell", bundle: nil)     table.registernib(nib, forcellreuseidentifier: "cell")      let searchbutton = uibarbuttonitem(barbuttonsystemitem: .search, target: self, action: "search:")     menubar.topitem?.leftbarbuttonitem = searchbutton     self.resultsearchcontroller = ({         let controller = uisearchcontroller(searchresultscontroller: nil)         controller.searchresultsupdater = self         controller.dimsbackgroundduringpresentation = false         return controller     })()     self.table.reloaddata() } 

i using modal segue in order open element's viewcontroller display details of element.

func tableview(tableview: uitableview, didselectrowatindexpath indexpath: nsindexpath) {     self.index = indexpath.row     self.performseguewithidentifier("itemdetailfromhome", sender: self) }  override func prepareforsegue(segue: uistoryboardsegue, sender: anyobject?) {     if (segue.identifier == "itemdetailfromhome") {         let settingsvc = segue.destinationviewcontroller as! itemdetailviewcontroller         settingsvc.parent = self         if self.issearching == true  && self.searchtext != nil && self.searchtext != ""  {             settingsvc.item = self.filtereditems[self.index!]         } else {             settingsvc.item = self.items[self.index!]         }      } } 

that works fine until try display itemdetailviewcontroller filtered element (through uisearchcontroller).

i have following message :

warning: attempt present <itemdetailviewcontroller: *>  on <homeviewcontroller: *> presenting (null) 

at every time going itemdetailviewcontroller.viewdidload() function after when search activated have previous error.

any idea ? have tried use following async dispatch without success

func tableview(tableview: uitableview, didselectrowatindexpath indexpath: nsindexpath) {     self.index = indexpath.row     dispatch_async(dispatch_get_main_queue(), { () -> void in         self.performseguewithidentifier("itemdetailfromhome", sender: self)     }) } 

i have found out solution.

i have add following code in homeviewcontroller.viewdidload , works !

definespresentationcontext = true