ios - Core Data empty tableview cell every time view loads -

i having problem tableview. every time view loads, creates new empty cell in table view. class view controller is: class mygoalsscreen: uiviewcontroller, uitableviewdelegate, uitableviewdatasource,nsfetchedresultscontrollerdelegate {

var controller: nsfetchedresultscontroller<goal>! var goals = [goal]()  @iboutlet weak var tableview: uitableview!   @iboutlet weak var totalgold: uilabel! override func viewdidload() {     super.viewdidload()     tableview.delegate = self      tableview.datasource = self      attemptfetch()     //generatetestdata()        // additional setup after loading view. }  @ibaction func prepareforunwind(segue:uistoryboardsegue){   } override func unwind(for unwindsegue: uistoryboardsegue, towardsviewcontroller subsequentvc: uiviewcontroller) {     let segue = unwindscalesegue(identifier:unwindsegue.identifier, source:unwindsegue.source, destination:unwindsegue.destination)     segue.perform() } func tableview(_ tableview: uitableview, caneditrowat indexpath: indexpath) -> bool {     return true }  func tableview(_ tableview: uitableview, cellforrowat indexpath: indexpath) -> uitableviewcell {       let cell = tableview.dequeuereusablecell(withidentifier: "goalcell", for: indexpath) as! goalcell           configurecell(cell: cell, indexpath: indexpath nsindexpath)       return cell }  func configurecell(cell: goalcell,indexpath: nsindexpath){     let goal = controller.object(at: indexpath indexpath)     cell.configurecell(goal: goal)    } func tableview(_ tableview: uitableview, commit editingstyle: uitableviewcelleditingstyle, forrowat indexpath: indexpath) {     if editingstyle == uitableviewcelleditingstyle.delete{         let managedobject: nsmanagedobject = controller.object(at: indexpath) nsmanagedobject;         context.delete(managedobject)         ad.savecontext()     } } func tableview(_ tableview: uitableview, titlefordeleteconfirmationbuttonforrowat indexpath: indexpath) -> string? {     return "finish" }     func tableview(_ tableview: uitableview, numberofrowsinsection section: int) -> int {     if let sections = controller.sections{         let sectioninfo = sections[section]         return sectioninfo.numberofobjects     }     return 0 }  func numberofsections(in tableview: uitableview) -> int {     if let sections = controller.sections{         return sections.count     }      return 0 } func tableview(_ tableview: uitableview, heightforrowat indexpath: indexpath) -> cgfloat {      return 188  }  func attemptfetch(){      let fetchrequest : nsfetchrequest<goal> = goal.fetchrequest()     let datesort = nssortdescriptor(key: "created", ascending: false)     fetchrequest.sortdescriptors = [datesort]     let controller = nsfetchedresultscontroller(fetchrequest: fetchrequest, managedobjectcontext: context, sectionnamekeypath: nil, cachename: nil)     controller.delegate = self     self.controller = controller     do{         try controller.performfetch()      }     catch{         let error = error nserror         print("\(error)")      }   } func tableview(_ tableview: uitableview, didselectrowat indexpath: indexpath) {     if let objs = controller.fetchedobjects, objs.count > 0{         let goal = objs[indexpath.row]         performsegue(withidentifier: "newgoalscreen", sender: goal)      } } override func prepare(for segue: uistoryboardsegue, sender: any?) {     if segue.identifier == "newgoalscreen"{         if let destination = segue.destination as? newgoalscreen{             if let goal = sender as? goal{                 destination.goaltoedit = goal             }         }     } }  func attemptfetch2(){     let fetchrequest: nsfetchrequest<goal> = goal.fetchrequest()     do{     self.goals = try context.fetch(fetchrequest)     }     catch{         print(error)      } }  func controllerwillchangecontent(_ controller: nsfetchedresultscontroller<nsfetchrequestresult>) {      tableview.beginupdates() } func controllerdidchangecontent(_ controller: nsfetchedresultscontroller<nsfetchrequestresult>) {      tableview.endupdates()  } func controller(_ controller: nsfetchedresultscontroller<nsfetchrequestresult>, didchange anobject: any, @ indexpath: indexpath?, type: nsfetchedresultschangetype, newindexpath: indexpath?) {     switch(type){     case.insert:         if let indexpath = newindexpath{             tableview.insertrows(at: [indexpath], with: .fade)           }         break     case.delete:         if let indexpath = indexpath{             tableview.deleterows(at: [indexpath], with: .fade)         }         break     case.update:         if let indexpath = indexpath{             tableview.reloadrows(at: [indexpath], with: uitableviewrowanimation.automatic)         }         break     default: break     } } 

and configurecell function have: class goalcell: uitableviewcell {

@iboutlet weak var title: uilabel!  @iboutlet weak var difficulty: uilabel! @iboutlet weak var desc: uilabel! @iboutlet weak var frequency: uilabel! func configurecell(goal: goal){     title.text = goal.title     desc.text = goal.desc     frequency.text = goal.frequency     difficulty.text = goal.difficulty  } 

}