Displaying content from Parse into a UITableViewController using Swift - ios

Question

I have been following a tutorial on Youtube which helps you create an app like Twitter using Parse as a backend service. So far I was able to add things to classes in Parse but I was either not able to retrieve them or display them in my table view.
I believe this is where my mistake is:
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell:messageTableViewCell = tableView!.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath!) as messageTableViewCell
let sweet:PFObject = self.timelineData.objectAtIndex(indexPath!.row) as PFObject
cell.messageTextView.alpha = 0
cell.timestampLabel.alpha = 0
cell.usernameLabel.alpha = 0
cell.messageTextView.text = sweet.objectForKey("content") as String
var dataFormatter:NSDateFormatter = NSDateFormatter()
dataFormatter.dateFormat = "yyyy-MM-dd HH:mm"
cell.timestampLabel.text = dataFormatter.stringFromDate(sweet.createdAt)
var findSweeter:PFQuery = PFUser.query()
findSweeter.whereKey("objectId", equalTo: sweet.objectForKey("username").objectId)
findSweeter.findObjectsInBackgroundWithBlock{
(objects:[AnyObject]!, error:NSError!)->Void in
if error == nil{
let user:PFUser = (objects as NSArray).lastObject as PFUser
cell.usernameLabel.text = user.username
UIView.animateWithDuration(0.5, animations: {
cell.messageTextView.alpha = 1
cell.timestampLabel.alpha = 1
cell.usernameLabel.alpha = 1
})
}
}
return cell
}
If you could help me figure this out I would really appreciate it, also please try to be detailed.
The error might also be here, I'm completely lost so I will post this as well!
func loadData(){
timelineData.removeAllObjects()
var findTimelineData:PFQuery = PFQuery(className: "Messages")
findTimelineData.findObjectsInBackgroundWithBlock{
(objects:[AnyObject]!, error:NSError!)->Void in
if error == nil{
for object in objects{
let message:PFObject = object as PFObject
self.timelineData.addObject(message)
}
let array:NSArray = self.timelineData.reverseObjectEnumerator().allObjects
self.timelineData = NSMutableArray(array: array)
self.tableView.reloadData()
}
}
}