title: Scroll UICollectionView to bottom
body: <p>I would like to scroll the UICollectionView to the bottom so the last item is in the view. I have tried to use scrollToItemAtIndexPath but it does not seem to be working. I want this to happen after I have completed a query with Parse.com</p>
  
  <p>Thanks</p>
  
  <pre><code>    var query = PFQuery(className:"Chat")
      //        query.whereKey("user", equalTo:currentUser)
      query.whereKey("rideId", equalTo:currentObjectId)
      query.orderByDescending("createdAt")
      query.includeKey("user")
  
      query.findObjectsInBackgroundWithBlock {
          (objects: [AnyObject]!, error: NSError!) -&gt; Void in
          if error == nil {
              // The find succeeded.
              NSLog("Successfully retrieved \(objects.count) scores.")
              // Do something with the found objects
              for object in objects {
                  NSLog("%@", object.objectId)
  
                  var testId = object.objectId
  
                  println(testId)
  
                  self.orderedIdArray.append(testId)
  
                  var message = object.objectForKey("message") as String
                  self.messageString = message
                  self.messageArray.append(self.messageString)
                  println(message)
  
                  var nameId = object.objectForKey("user") as PFUser
                  var username = nameId.username as String
                  self.nameString = username
                  self.namesArray.append(self.nameString)
  
                  println("username: \(username)")
  
                  self.collectionView?.reloadData()
              }
  
          } else {
              // Log details of the failure
              NSLog("Error: %@ %@", error, error.userInfo!)
          }
                      NSLog("Ordered: %@", self.orderedIdArray)    
      }
  </code></pre>