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

        let column = columns[indexPath.row]
        cell.dbColumnName.text = column.name
        cell.dbColumnOrder.titleLabel?.text = column.order
        cell.dbColumnOrder.tag = indexPath.row

        print(columns)
        cell.dbColumnOrder.addTarget(self, action: #selector(ViewController.showAlert(_:)), forControlEvents: UIControlEvents.TouchUpInside)
        return cell
    }

//MARK:Show Alert
    func showAlert(sender:UIButton){
        let alert = UIAlertController(title: "Column Order", message: "Please select column order", preferredStyle: .ActionSheet)
        let index = sender.tag
        let indexPath = NSIndexPath(forRow: index, inSection: 0)

        alert.addAction(UIAlertAction(title: "None", style: .Default, handler: { (action) in
            //execute some code when this option is selected
            self.columns[index].order = "None"
            self.tableView.reloadRowsAtIndexPaths([indexPath], withRowAnimation: .None)
        }))

        alert.addAction(UIAlertAction(title: "Assending", style: .Default, handler: { (action) in
            //execute some code when this option is selected
            self.columns[index].order = "Assending"
            self.tableView.reloadRowsAtIndexPaths([indexPath], withRowAnimation: .None)
        }))

        alert.addAction(UIAlertAction(title: "Desending", style: .Default, handler: { (action) in
            //execute some code when this option is selected
            self.columns[index].order = "Desending"
            self.tableView.reloadRowsAtIndexPaths([indexPath], withRowAnimation: .None)
        }))

        self.presentViewController(alert, animated: true, completion: nil)
    }