title: iOS : Collection view doesn't show
body: <p>I have a collection view in my app, I want it to contain a custom cells. I've created a custom cell view xib file. Then I use it in my data source method :</p>
  
  <pre><code>- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
   OtherCustomersCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:OTHER_CUSTOMERS_CELL_IDENTIFIER forIndexPath:indexPath];
  
    if(cell == nil){
        NSArray *nsObjects = [[NSBundle mainBundle] loadNibNamed:@"OtherCustomersCell" owner:nil options:nil];
      for(id obj in nsObjects)
          if([obj isKindOfClass:[OtherCustomersCell class]])
              cell = (OtherCustomersCell*) obj;
  }
  [cell.name setText:@"AAAA BBBBB"];
  
  return cell;
  }
  </code></pre>
  
  <p>But when I run the app, there is just a black rectangular where the collection view should be (at the bottom under the table view):</p>
  
  <p><img src="https://i.stack.imgur.com/5GLJd.png" alt="enter image description here"></p>
  
  <p>What am I doing wrong?
  Thank you in advance.</p>