Can't reload UITableView - ios

Question

I am trying to design View where i can show elements in sync with my Firebase Database. Every time element in my array changes it gets duplicated. Tried to use
self.tableView.reloadData()
but nothing changes. Tried as well
self.tableView.beginUpdates()
self.tableView.reloadRowsAtIndexPaths(NSArray.init(object: indexPath) as! [NSIndexPath], withRowAnimation: .Automatic)
self.tableView.endUpdates()
and it didn't work as previously.
I have tried unsuccesfully to perform reloading tableView in main thread using function
performSelectorOnMainThread
I am posting my code for you guys so someone can help me. Im quite new to iOS programming and i can't figure out when to reload data in tableView. Even after reading Apple's Documentation.
override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
let alert = UIAlertController(title: "Akcja", message: "Wybierz akcję", preferredStyle: .ActionSheet)
let changeFieldNumberAction = UIAlertAction(title: "Zmień numer boiska", style: .Default, handler: {(action) in
self.showAlertOfChangingFieldNumber(indexPath)
})
let sendToRefereeAction = UIAlertAction(title: "Wskaż sędziego", style: .Default, handler: {(action) in
//self.championshitTournamentMode = false
})
let cancelAction = UIAlertAction(title: "Anuluj", style: .Cancel, handler: nil)
alert.addAction(cancelAction)
alert.addAction(changeFieldNumberAction)
alert.addAction(sendToRefereeAction)
self.presentViewController(alert, animated: true, completion: nil)
}
func showAlertOfChangingFieldNumber(indexPath: NSIndexPath) {
let fieldNumberAlert = UIAlertController(title: "Numer boiska", message: "Wpisz numer boiska", preferredStyle: .Alert)
fieldNumberAlert.addTextFieldWithConfigurationHandler({(textField: UITextField!) -> Void in
textField.placeholder = "Numer boiska"
textField.keyboardType = UIKeyboardType.NumberPad
})
let saveAction = UIAlertAction(title: "Zapisz", style: .Default, handler: {(action) -> Void in
let fieldNumberTextField = fieldNumberAlert.textFields![0] as UITextField
let fieldNumber = Int(fieldNumberTextField.text!)
self.updateGameFieldNumber(fieldNumber!, indexPath: indexPath)
})
let cancelAction = UIAlertAction(title: "Anuluj", style: .Cancel, handler: nil)
fieldNumberAlert.addAction(cancelAction)
fieldNumberAlert.addAction(saveAction)
self.presentViewController(fieldNumberAlert, animated: true, completion: nil)
}
func updateGameFieldNumber(fieldNumber: Int, indexPath: NSIndexPath){
let gameKey = games[indexPath.row].key
let ref = FIRDatabase.database().reference().child("games").child(gameKey)
games[indexPath.row].fieldNumber = fieldNumber
ref.updateChildValues(games[indexPath.row].toAnyObject() as! [NSObject : AnyObject])
//self.games.removeAtIndex(indexPath.row+1)
self.tableView.beginUpdates()
self.tableView.reloadRowsAtIndexPaths(NSArray.init(object: indexPath) as! [NSIndexPath], withRowAnimation: .Automatic)
self.tableView.endUpdates()
}
And my tableView delegate functions and function made for filling my array based on Firebase's database looks like that:
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as! GameViewCellTableViewCell
if games[indexPath.row].fieldNumber == 0 {
cell.fieldNumberLabel.text = "-"
} else {
cell.fieldNumberLabel.text = String(games[indexPath.row].fieldNumber)
}
cell.firstParticipantLabel.text = games[indexPath.row].firstParticipant
cell.secondParticipantLabel.text = games[indexPath.row].secondParticipant
cell.gameImage.image = UIImage(named: "tenisBall")
if games[indexPath.row].completed != true {
cell.backgroundColor = UIColor.init(red: 1, green: 109.0/255, blue: 95.0/255, alpha: 1)
} else {
cell.backgroundColor = UIColor.init(red: 160/255, green: 1, blue: 86/255, alpha: 1)
}
return cell
}
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return self.games.count
}
func getGames() {
let ref = FIRDatabase.database().reference().child("games")
ref.observeEventType(.Value, withBlock: {snapshot in
for item in snapshot.children {
let gameItem = GameItem(snapshot: item as! FIRDataSnapshot)
if(gameItem.tournamentName == self.tournamentName) {
self.games.append(gameItem)
}
}
self.tableView.reloadData()
})
}

Answer 1

It gets duplicated because instead of updating the value in your "games" array, you append the modified value to the array. This happens in the "getgames()" method.

Answer 2

inside the
func getGames()
after
self.games.append(gameItem)
dispatch_async(dispatch_get_main_queue(), {
self.tableView.reloadData()
})