ios - NSFetchedResultsController swift sections -

i have table view takes data coredata entity 3 fields. firstname: string, lastname: string , done:nsnumber (which uiswitch can turned on or off).

i want populate table first , last names first section names having switch on, , second section names having switch off.

here code saves data:

class viewcontroller: uiviewcontroller { var context = (uiapplication.sharedapplication().delegate as! appdelegate).managedobjectcontext! var newitem: list? = nil  @iboutlet weak var txtfirst: uitextfield! @iboutlet weak var txtlast: uitextfield! @iboutlet weak var switchdone: uiswitch!  override func viewdidload() {     super.viewdidload() } override func didreceivememorywarning() {     super.didreceivememorywarning() } @ibaction func canceltapped(sender: anyobject) {     dismissvc() } @ibaction func savetapped(sender: anyobject) {     let context = self.context     let ent = nsentitydescription.entityforname("list", inmanagedobjectcontext: context)      let nitem = list(entity: ent!, insertintomanagedobjectcontext: context)     nitem.firstname = txtfirst.text     nitem.lastname = txtlast.text     nitem.done = switchdone.on     context.save(nil)             dismissvc() } func dismissvc() {     navigationcontroller?.popviewcontrolleranimated(true) } } 

and here code populates table view:

class tableviewcontroller: uitableviewcontroller, nsfetchedresultscontrollerdelegate {  var context = (uiapplication.sharedapplication().delegate as! appdelegate).managedobjectcontext!  var frc: nsfetchedresultscontroller = nsfetchedresultscontroller()  func getfetchedresultscontroller() -> nsfetchedresultscontroller {     frc = nsfetchedresultscontroller(fetchrequest: listfetchrequest(), managedobjectcontext: context, sectionnamekeypath: nil, cachename: nil)     return frc } func listfetchrequest() -> nsfetchrequest {     let fetchrequest = nsfetchrequest(entityname: "list")     let sortdescriptor = nssortdescriptor(key: "firstname", ascending: true)     fetchrequest.sortdescriptors = [sortdescriptor]     return fetchrequest } override func viewdidload() {     super.viewdidload()     frc = getfetchedresultscontroller()     frc.delegate = self     frc.performfetch(nil) } override func didreceivememorywarning() {     super.didreceivememorywarning() }  func controllerdidchangecontent(controller: nsfetchedresultscontroller) {     tableview.reloaddata() }  // mark: - table view data source  override func numberofsectionsintableview(tableview: uitableview) -> int {     let numberofsections = frc.sections?.count     return numberofsections! } override func tableview(tableview: uitableview, numberofrowsinsection section: int) -> int {     let numberofrowsinsection = frc.sections?[section].numberofobjects     return numberofrowsinsection! } override func tableview(tableview: uitableview, cellforrowatindexpath indexpath: nsindexpath) -> uitableviewcell {     let cell = tableview.dequeuereusablecellwithidentifier("cell", forindexpath: indexpath) as! uitableviewcell     let list = frc.objectatindexpath(indexpath) as! list      cell.textlabel?.text = list.firstname     cell.detailtextlabel?.text = list.lastname      return cell }  } 

i can't figure out how separate data 2 sections based on 'done' attribute.

first, need sort list objects done attribute, firstname:

let donesortdescriptor = nssortdescriptor(key: "done", ascending: true) let sortdescriptor = nssortdescriptor(key: "firstname", ascending: true) fetchrequest.sortdescriptors = [donesortdescriptor, sortdescriptor] 

then amend fetched results controller use done attribute define sections:

frc = nsfetchedresultscontroller(fetchrequest: listfetchrequest(), managedobjectcontext: context, sectionnamekeypath: "done", cachename: nil) 

finally, implement tableview:titleforheaderinsection set appropriate title each section.