code

struct User{
    let uid:String?
    let name:String?
}

class TableViewController: UITableViewController {

    var firebase = Firebase(url: "https://myurl/")
    var childAddedHandler = FirebaseHandle()
    var listOfMessages = NSMutableDictionary()

    override func viewDidLoad() {
        super.viewDidLoad()

        childAddedHandler = firebase.childByAppendingPath("posts").observeEventType(FEventType.Value, withBlock: { (snapshot:FDataSnapshot!) in

            self.firebaseUpdate(snapshot)

        })

    /*    childAddedHandler = firebase.observeEventType(FEventType.ChildAdded, withBlock: { (snapshot:FDataSnapshot!) in

            self.firebaseUpdate(snapshot)

        })*/
    }

    func firebaseUpdate(snapshot:FDataSnapshot!){


        if let newMessages = snapshot.value as? NSDictionary{

            for newMessage in newMessages{
                let key = newMessage.key as! String
                let messageExist = (self.listOfMessages[key] != nil)

                if !messageExist{
                    self.listOfMessages.setValue(newMessage.value, forKey: key)
                }

            }

        }
        dispatch_async(dispatch_get_main_queue()){ [unowned self] in
            self.tableView.reloadData()
        }


    }

    @IBAction func AddMessage(sender: AnyObject) {

    }

    @IBAction func Logout(sender: AnyObject) {
        firebase.unauth()
        self.dismissViewControllerAnimated(true, completion: nil)
    }

    override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
        if let messageVController = segue.destinationViewController as? MessageViewController{

            messageVController.onMessageAvailable = {[weak self] (data) in

                if let weakSelf = self {
                    weakSelf.receiveMessageToSendToFirebase(data)
                }

            }
        }
    }

    func receiveMessageToSendToFirebase(data : String) {
        let details = ["message":data, "sender":firebase.authData.uid]
        firebase.childByAppendingPath("posts").childByAutoId().setValue(details)
    }


    override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return listOfMessages.count
    }

    override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath)

        let arrayOfKeys = listOfMessages.allKeys
        let key = arrayOfKeys[indexPath.row]

        let value = listOfMessages[key as! String]

        cell.textLabel!.text = (value as! NSDictionary)["message"] as? String

        return cell
    }
}