title: NSPrivateQueueConcurrencyType Not saving properly
body: <p>The following method gets called in order to populate my <code>Core-Data</code> after <code>AFNetworking</code> fetches information from my app server.</p>
  
  <p>The information seems to be perfectly working as when the table is updated I can see the new information being updated in the <code>UITableView</code>.</p>
  
  <p>Now the problem that I have is that even tho I can see the information ( after it has been fetches from the server, stored into Core-data and refetches to display in my <code>UITableView</code>) If I then go and close my app and re open it, the information is not there anymore.</p>
  
  <p>It seems as if the information is not persistent and the problem seems to be the thread. given that if I remove the thread option in my method everything works fine.</p>
  
  <p>What am I missing?? I have tried most things that I came across but I can't seem to find a solution.</p>
  
  <pre><code>NSManagedObjectContext *childContext = [[NSManagedObjectContext alloc]
                                          initWithConcurrencyType:NSPrivateQueueConcurrencyType];
  childContext.parentContext = managedObjectContext;
  myModel.context = childContext;
  
  
     [childContext performBlock:^{
  // ... Lots Controller logic code that then calls the class myModel where all my Core-Data save methods are
  
      // Sort Wall Pictures
                      if ( [dataHolder[@"verb"] isEqualToString:@"addWallPicture"] ) {
                          data = @{  @"resourceID":dataHolder[@"_id"][@"$id"],
                                     @"resourceName":dataHolder[@"details"][@"resourceName"],
                                     @"author":@{ @"id":dataHolder[@"userId"][@"$id"],
                                                  @"username":dataHolder[@"details"][@"authorName"] },
                                     @"likesNumber":@0,
                                     @"likesPeople":@[]
                                     };
  
                          [myModel saveSocialWall:data date:date verb:dataHolder[@"verb"] code:dataHolder[@"_id"][@"$id"] myUser:myUser];
                          continue;
                      }
  [childContext save:&amp;error];
  }];
  </code></pre>