title: How do I reload a Collection View automatically?
body: <p>I have developed an RSS reader application using collection views. My problem is, on the very first launch, the app comes up blank.</p>
  
  <p>The process is, the RSS feed is pulled from the web, stored to a temporary file on the device and then displayed via collection views. </p>
  
  <p>My question is How Do i get the app to reload the data automatically once the files have been loaded? So that the user does not see an initial blank screen.</p>
  
  <p>I have tried adding this code</p>
  
  <pre><code>       [self.collection1 performBatchUpdates:^{
         [self.collection1 reloadSections:[NSIndexSet indexSetWithIndex:0]];
     } completion:nil];
  </code></pre>
  
  <p>However it does not work for the initial view. </p>
  
  <p>Should I do something from the appdelegate? or from the collection view controller itself?</p>
  
  <p>Please advise</p>
  
  <p>Below is the code used to get and display my data....</p>
  
  <pre><code>#pragma mark - UICollectionViewDataSourceDelegate
  - (NSInteger) numberOfSectionsInCollectionView:(UICollectionView *)collectionView
    {
    return 1;
    }
  
  - (NSInteger) collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
  {
   return [_articleListmain count];
  }
  
  - (UICollectionViewCell *) collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
  {
   MainCollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"articleCellmain"
                                                                             forIndexPath:indexPath];
  NSDictionary *item = [_articleListmain objectAtIndex:indexPath.item];
  
  // set the article image
  [cell.image setImageWithURL:[item objectForKey:@"image"]];
  
  // set the text of title UILabel
  cell.title.text = [NSString stringWithFormat:@"%@\n\n\n\n", [item objectForKey:@"title"]];
  cell.title.textColor = [UIColor colorWithRed:33.0f/255.0f green:74.0f/255.0f blue:146.0f/255.0f alpha:1.0f];
  
  // set the text of summary UILabel
  cell.description.text = [NSString stringWithFormat:@"%@\n\n\n\n\n\n\n\n\n", [item objectForKey:@"description"]];
  
  
  cell.targetURL.text = [NSString stringWithFormat:@"%@\n\n\n\n", [item objectForKey:@"link"]];
  
  cell.category.text = [NSString stringWithFormat:@"%@\n\n\n\n", [item objectForKey:@"category"]];
  
  cell.date.text = [NSString stringWithFormat:@"%@\n\n\n\n", [item objectForKey:@"pubDate"]];
  
  cell.image.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"placement.png"]];
  
  
  return cell;
  
  
  }
  </code></pre>