ios - How to update managed object data? -

i have started first core data application. working 1 entity right called 'folder'.

the first view controller displays folders in tableview, can add , reloads data. works fine because uses fetch request populate table.

override func viewwillappear(animated: bool) {     var error: nserror?     let request = nsfetchrequest(entityname: "folder")     request.sortdescriptors = [nssortdescriptor(key: "date", ascending: true)]      self.events = moc?.executefetchrequest(request, error: &error) as! [folder]              self.uitable.reloaddata()   } 

however when segueing view controller via table cell pass on selected folder data controller using index path. e.g.

override func prepareforsegue(segue: uistoryboardsegue, sender: anyobject!) {     if segue.identifier == "showdetails" {         let destinationvc = segue.destinationviewcontroller as! folderdetailsviewcontroller         let indexpath = uitable.indexpathforselectedrow()         let selectedfolder = folders[indexpath!.row]         destinationvc.selectedfolder = selectedfolder             }  } 

my second view controller uses data passed first table view display in textfields:

var selectedfolder: folder! foldernamelabel.text = selectedfolder?.title folderdetailslabel.text = selectedfolder?.details folderdatelabel.text = displaydate 

i have modal edit/save folder data in modal appearing second controller:

//edit , save event     let context = (uiapplication.sharedapplication().delegate as! appdelegate).managedobjectcontext             //error             var error: nserror?              //storing data fields             selectedfolder!.title = foldername.text             selectedfolder!.details = folderdetails.text             selectedfolder!.date = folderdate.date              context?.save(&error)          self.dismissviewcontrolleranimated(true, completion: {}); 

when dismissing modulate data not updated, have go first controller reload data , segue again.

i think because have no nsfetchrequest (or nsfetchresultscontroller) recent changes.

what best method reload data of selectedfolder when make changes in modal ?

you can refresh second view in viewwillappera() if modal view presented in full screen.

override func viewwillappear(animated: bool) {  {    foldernamelabel.text = selectedfolder?.title   folderdetailslabel.text = selectedfolder?.details   folderdatelabel.text = displaydate }