Issue with tableview method func tableView(tableView: UITableView, editActionsForRowAtIndexPath indexPath: NSIndexPath) -> [UITableViewRowAction]?

I am using the method

 func tableView(tableView: UITableView, editActionsForRowAtIndexPath indexPath: NSIndexPath) -> [UITableViewRowAction]?
{ 
let delete = UITableViewRowAction(style: UITableViewRowActionStyle.Default, title: "Delete" , handler: { (action:UITableViewRowAction!, indexPath:NSIndexPath!) -> Void in
        //Do something
    })
    delete.backgroundColor = UIColor.redColor()

    let more = UITableViewRowAction(style: UITableViewRowActionStyle.Default, title: "More" , handler: { (action:UITableViewRowAction!, indexPath:NSIndexPath!) -> Void in
        //Do something
    })
    more.backgroundColor = UIColor.blueColor()

    retu [delete, more]
}

I also included

func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
    // you need to implement this method too or you can't swipe to display the actions
        }

func tableView(tableView: UITableView, canEditRowAtIndexPath indexPath: NSIndexPath) -> Bool {
    // the cells you would like the actions to appear needs to be editable
    retu true
}

and when I swipe right or left the buttons I created are not showing up. I tried putting override on the editactionforrowatindexpath but then i get an error saying method does not override any method from its super class