ios - Swift: Deleting core data, table won't update -

this code seems deleting actual data ok table doesn't update without row unless force close app , reopen. in advance.

import uikit import coredata

class viewcontroller: uiviewcontroller,uitableviewdatasource,uitableviewdelegate {

var lists = [nsmanagedobject]() var deletelistindexpath: nsindexpath? = nil  @iboutlet weak var mytableview: uitableview!  @ibaction func additem(sender: anyobject) {     let alert = uialertcontroller(title: "new list", message: "add new list", preferredstyle: .alert)      let saveaction = uialertaction(title: "save", style: .default) { (uialertaction) -> void in          let textfield = alert.textfields![0] uitextfield         if textfield != "" {            self.saveitem(textfield.text!)           self.mytableview.reloaddata()         }         }       let cancelaction = uialertaction(title: "cancel", style: .default, handler: nil)     alert.addtextfieldwithconfigurationhandler(nil)     alert.addaction(saveaction)     alert.addaction(cancelaction)      presentviewcontroller(alert, animated: true, completion: nil) }    func tableview(tableview: uitableview, numberofrowsinsection section: int) -> int {     return lists.count }   func tableview(tableview: uitableview, cellforrowatindexpath indexpath: nsindexpath) -> uitableviewcell {     let mycell:uitableviewcell = mytableview.dequeuereusablecellwithidentifier("prototype1")!      let list = lists[indexpath.row]     print(lists[indexpath.row])     mycell.textlabel?.text = list.valueforkey("listtitle") as? string       return mycell }    override func viewdidload() {     super.viewdidload()     self.mytableview.datasource = self    self.mytableview.delegate = self      let appdelegate = uiapplication.sharedapplication().delegate as! appdelegate     let managedcontext = appdelegate.managedobjectcontext      let fetchrequest = nsfetchrequest(entityname:"list")      // may need sort list     let sortdescriptor1 = nssortdescriptor(key: "listtitle", ascending: true)     let sortdescriptors = [sortdescriptor1]     fetchrequest.sortdescriptors = sortdescriptors      var fetchedresults : [nsmanagedobject] = []          {         fetchedresults = try managedcontext.executefetchrequest(fetchrequest) as! [nsmanagedobject]     }     catch     {         return     }      list in fetchedresults     {         lists.append(list)     }      self.mytableview.reloaddata()  }   func tableview(tableview: uitableview, caneditrowatindexpath indexpath: nsindexpath) -> bool {     return true }  func tableview(tableview: uitableview, commiteditingstyle editingstyle: uitableviewcelleditingstyle, forrowatindexpath indexpath: nsindexpath) {     if(editingstyle == .delete ) {         // find logitem object user trying delete         let logitemtodelete = lists[indexpath.row]         let appdelegate = uiapplication.sharedapplication().delegate as! appdelegate         let managedcontext = appdelegate.managedobjectcontext          managedcontext.deleteobject(logitemtodelete)         self.mytableview.reloaddata()       } }       func saveitem(saveitem: string) {     let appdelegate = uiapplication.sharedapplication().delegate as! appdelegate      let managedcontext = appdelegate.managedobjectcontext      let entity = nsentitydescription.entityforname("list", inmanagedobjectcontext: managedcontext)     let item = nsmanagedobject(entity: entity!, insertintomanagedobjectcontext: managedcontext)      item.setvalue(saveitem, forkey: "listtitle")      {         try managedcontext.save()         lists.append(item)       }     catch {         print("error")     } } 

}

i think still need remove "logitem" lists object.

lists.removeatindex(indexpath.row) 

i give more precise answer if upload code function @ tableview datasource protocol:

override func tableview(tableview: uitableview, cellforrowatindexpath indexpath: nsindexpath)