Unable to retrieve createdAt values from Parse objects - ios

Question

I cannot get the createdAt value from Parse for each object.And I dont want to have to save an additional timestamp as a String when the data is sitting right there.
This is the list of what i was doing.I hope someone who can help
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var followArray = [String]()
var resultsNameArray = [String]()
var resultsIcon = [PFFile]()
var resultsImgArray = [PFFile?]()
var resultsTimeTampArray = [NSDate?]()
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func refreshResult()
{
var followQuery = PFQuery(className: "Follow")
followQuery.whereKey("user", equalTo: PFUser.currentUser()!.username!)
followQuery.findObjectsInBackgroundWithBlock { (objects: [AnyObject]?, error: NSError?) -> Void in
if error == nil
{
for object in objects!
{ self.followArray.append(object.objectForKey("Following") as! String)
}
var query = PFQuery(className: "Moments")
query.whereKey("userName", containedIn: self.followArray)
query.addDescendingOrder("createdAt")
query.findObjectsInBackgroundWithBlock { (objects: [AnyObject]?, error: NSError?) -> Void in
if error == nil
{
for object in objects!
{
self.resultsNameArray.append(object.objectForKey("profileName") as! String)
self.resultsIcon.append(object.objectForKey("icon") as! PFFile)
self.resultsImgArray.append(object.objectForKey("image") as? PFFile)
//tried to use "createdAt" property but it i still getting nil value from Parse
self.resultsTimeTampArray.append(object.objectForKey("createdAt") as! NSDate)
}
//reload table
self.resultsTable.reloadData()
}
}
}
}
-----------------------------------------------------------------------
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell
{
var cell:TimelineCell = tableView.dequeueReusableCellWithIdentifier("Cell") as! TimelineCell
enter code here //I'v got an error here!
//fatal error: unexpectedly found nil while unwrapping an Optional value
// dataFormatter
var dateFormatter:NSDateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd"
var strDate = dateFormatter.stringFromDate(self.resultsTimeTampArray[indexPath.row]!)
return cell
}

Answer 1

Don't access it using objectForKey, just access it directly via the createdAt property.
As explicitly stated in the docs, the keys:
This does not include createdAt, updatedAt, authData, or objectId. It does include things like username and ACL.

Answer 2

You can access it directly in your for object loop like this.
object.updatedAt
instead of
objectforkey("updatedAt")