Variable captured by closure before being initialized

You need to initialize the variable before use it inside a closure:

As per apple documentation

If you use a closure to initialize a property, remember that the rest of the instance has not yet been initialized at the point that the closure is executed. This means that you cannot access any other property values from within your closure, even if those properties have default values. You also cannot use the implicit self property, or call any of the instance’s methods.

The command var numberOfGames: Int just declare it to initialize you can use var numberOfGames = Int() or var numberOfGames:Int = 0

func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int    {        var user: PFUser!        var numberOfGames:Int = 0        var query = PFQuery.orQueryWithSubqueries([userQuery, userQuery2, currentUserQuery, currentUserQuery2])        query.findObjectsInBackgroundWithBlock{            (results: [AnyObject]?, error: NSError?) -> Void in            if error != nil {                println(error)            }            if error == nil{                if results != nil{                    println(results)                    numberOfGames = results!.count as Int                }            }        }        return numberOfGames    }