Variable not being saved outside closure - swift

Question

I am using Parse for a database.
Problem: I am querying the database and saving an object, but it does not seem to be saving outside the query function. I think it is because I need to refresh a variable or something but I have no idea how to do that.
Relevant code:
class AddClassViewController: UIViewController {
var classroom = Classroom()
var checkClassList: [Classroom] = []
#IBAction func enrollClassButton(sender: AnyObject) {
self.classroom.classCode = classCodeText.text.uppercaseString
self.classroom.year = yearText.text
self.classroom.professor = professorNameText.text
ClassListParseQueryHelper.checkClass({ (result: [AnyObject]?,error: NSError?) -> Void in
self.checkClassList = result as? [Classroom] ?? []
//count is 1 inside here
println(self.checkClassList.count)
}, classCode: self.classroom.classCode!)
//count is 0 out here
println(self.checkClassList.count)
}
//this gets class with matching classcode
static func checkClass(completionBlock: PFArrayResultBlock, classCode: String){
let query = PFQuery(className: "Classroom")
query.whereKey("ClassCode", equalTo: classCode)
query.findObjectsInBackgroundWithBlock(completionBlock)
}

Answer 1

This is how I solved this:
class ClassListParseQueryHelper{
//this gets class with matching classcode
static func checkClass(classCode: String) -> [PFObject]{
let query = PFQuery(className: "Classroom")
query.whereKey("ClassCode", equalTo: classCode)
var test = query.findObjects() as! [PFObject]
return test
}
self.checkClassList = ClassListParseQueryHelper.checkClass(self.classroom.classCode!) as! [Classroom]