I'm trying to store the number of results from a query into an integer so that I can use it to determine the number of rows in a table. However, I'm getting the following error: Variable 'numberOfGames' captured by a closure before being initialized'
on the line query.findObjectsInBackgroundWithBlock{
.
I also get another error Variable 'numberOfGames' used before being initialized
on the line return numberOfGames
.
Here's the function that contains the two errors:
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int { var user: PFUser! var numberOfGames: Int //...query code....removed to make it easier to read 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 }
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 }
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With