title: How to initialize popover view from UICollectionViewCell in IOS
body: <p>I've been tracking along with an iPad app using storyboards, and I've been stuck on this for days. How can I initiate a popover segue by selecting a cell in a collection view? The main problem is getting past the error that the popover must be anchored to a view.</p>
  
  <p>The approach seems to be putting a dummy <code>popoverAnchorButton</code> (hidden, disabled) in the view, create a segue from it to the popover view in the storyboard, position it in <code>didSelectItemAtIndexPath</code>, and then <code>[self performSegue]</code>.  Code looks like this:</p>
  
  <pre><code>- (IBAction)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath
  
      [self.collectionView deselectItemAtIndexPath:indexPath animated:NO];
      UICollectionViewCell *cell = [self.collectionView cellForItemAtIndexPath:indexPath];
      CGRect anchorRect = CGRectMake(cell.center.x, cell.center.y, 1.0f, 1.0f);
      self.popoverAnchorButton.frame = anchorRect;
      [self performSegueWithIdentifier:@"popoverSegue" sender:self];
  }
  </code></pre>
  
  <p>This works elsewhere in the app in a table view, because the storyboard lets me drop a button in the view, to use as an anchor point.  But Xcode doesn't let me drop a button or any other suitable view into the collection view in the storyboard, so I can't create the segue. Creating the button programmatically is no help, because I can't build a UIStoryboardSegue from it, and any manual segue from the controller gives the same error about lacking an anchor point.  Any ideas?</p>
  
  <p>I think another path could be to skip segues and instantiate the popover view controller programmatically, but the roadblock here is an error stemming from the fact that the popover view I create (since I'm using storyboards) has no xib.  Do I have to create a separate xib file just for this popover view?  Is that the only option? </p>