ios - How to manage Core Data to fulfill appropriate section? -

i have 1 table view controller (cardtableviewcontroller) 3 sections (english, chinese, spanish) , view controller (cardeditviewcontroller) can add new items in cards: e.g. can add "lesson 6" english. problem use core data, when create new item, appears not in english elsewhere (in english, spanish , chinese – same item everywhere).

how can create save in appropriate section? it's kind of relationship.

cardtableviewcontroller.m

#import "cardtableviewcontroller.h" @import coredata;  @interface cardtableviewcontroller ()  @property (strong) nsmutablearray *collections;  @end  @implementation cardtableviewcontroller  - (nsmanagedobjectcontext *)managedobjectcontext {     nsmanagedobjectcontext *context = nil;     id delegate = [[uiapplication sharedapplication] delegate];     if ([delegate performselector:@selector(managedobjectcontext)]) {         context = [delegate managedobjectcontext];     }     return context; }  - (void)viewdidappear:(bool)animated {     [super viewdidappear:animated];       nsmanagedobjectcontext *managedobjectcontext = [self managedobjectcontext];     nsfetchrequest *fetchrequest = [[nsfetchrequest alloc] initwithentityname:@"collection"];     self.collections = [[managedobjectcontext executefetchrequest:fetchrequest error:nil] mutablecopy];      [self.tableview reloaddata]; }    - (nsinteger)numberofsectionsintableview:(uitableview *)tableview {     return 1; }  - (nsinteger)tableview:(uitableview *)tableview numberofrowsinsection:(nsinteger)section {     return self.collections.count; }   - (uitableviewcell *)tableview:(uitableview *)tableview cellforrowatindexpath:(nsindexpath *)indexpath {     uitableviewcell *cell = [tableview dequeuereusablecellwithidentifier:@"cell" forindexpath:indexpath];      nsmanagedobject *collection = [self.collections objectatindex:indexpath.row];     [cell.textlabel settext:[nsstring stringwithformat:@"%@", [collection valueforkey:@"name"]]];        return cell; }    - (bool)tableview:(uitableview *)tableview caneditrowatindexpath:(nsindexpath *)indexpath {      return yes; }   - (void)tableview:(uitableview *)tableview commiteditingstyle:(uitableviewcelleditingstyle)editingstyle forrowatindexpath:(nsindexpath *)indexpath {      nsmanagedobjectcontext *context = [self managedobjectcontext];     if (editingstyle == uitableviewcelleditingstyledelete) {          [context deleteobject:[self.collections objectatindex:indexpath.row]];          nserror *error = nil;         if (![context save:&error]) {             nslog(@"can't delete! %@ %@", error, [error localizeddescription]);             return;         }          [self.collections removeobjectatindex:indexpath.row];         [self.tableview deleterowsatindexpaths:[nsarray arraywithobject:indexpath] withrowanimation:uitableviewrowanimationfade];     } }  @end 

cardeditviewcontroller.h

#import <uikit/uikit.h>  @interface cardeditviewcontroller : uiviewcontroller  @property (weak, nonatomic) iboutlet uitextfield *namecommon;  - (ibaction)save:(id)sender; - (ibaction)cancel:(id)sender;  @end 

cardeditviewcontroller.m

#import "cardeditviewcontroller.h" @import coredata;  @interface cardeditviewcontroller ()    @end  @implementation cardeditviewcontroller  - (nsmanagedobjectcontext *)managedobjectcontext {     nsmanagedobjectcontext *context = nil;     id delegate = [[uiapplication sharedapplication] delegate];     if ([delegate performselector:@selector(managedobjectcontext)]) {         context = [delegate managedobjectcontext];     }     return context; }  - (ibaction)cancel:(id)sender {     [self.navigationcontroller popviewcontrolleranimated:yes];  }  - (ibaction)save:(id)sender {     nsmanagedobjectcontext *context = [self managedobjectcontext];       nsmanagedobject *newcollection = [nsentitydescription insertnewobjectforentityforname:@"collection" inmanagedobjectcontext:context];     [newcollection setvalue:self.namecommon.text forkey:@"name"];       nserror *error = nil;      if (![context save:&error]) {         nslog(@"can't save! %@ %@", error, [error localizeddescription]);     }      [self.navigationcontroller popviewcontrolleranimated:yes]; }   @end 

this not how done. trying solve problems have been solved you. instead, should use nsfetchedresultscontroller populate table view core data.

create new project (e.g. master-detail) , check "core data" option see how done. can copy paste fetched results controller code app without many modifications.