TableView.reloadData() is not working ? (SWIFT)

Question

I am developing a Quiz App which fetches questions from a JSON. I have already used reloadData for TableView many times & worked as expected. But now I am fetching Questions using Alamofire & saving it in a Array & fetching the Questions from the Array.

But it returns Array is Out of Index.

How can i Display the First item of the Array in the first Cell ?

VC

class ExamController: UIViewController, UITableViewDataSource, UITableViewDelegate {

    @IBOutlet weak var Exam: UITableView!

    var CourseID : String!
    var EID : String!
    var EName : String!
    var ET : String!

    var QArray : [String] = []

    var progress = GradientCircularProgress()


    override func viewDidLoad() {
        super.viewDidLoad()
        progress.show(style:MyStyle())
        // JUST TRIED
        dispatch_async(dispatch_get_main_queue(), {
            self.getQuestions()
            // DO SOMETHING ON THE MAINTHREAD
            self.Exam.reloadData()
        })

        self.Exam.tableFooterView = UIView(frame: CGRectZero)
        self.Exam.tableFooterView?.hidden = true
    }

    func getQuestions(){

        if ET == "CHAPTER" {
            Alamofire.request(.GET, "http://www.wis.com/index.php/capp/chapter_questions_details/\(CourseID)/\(EID)/10")
                .responseJSON { (_, _, data, _) in
                    println(data)
                    let json = JSON(data!)
                    let catCount = json.count
                    for index in 0...catCount-1 {
                        let q = json[index]["QUESTION"].string
                        self.QArray.append(q!)
                        println(self.QArray)
                    }

            }

            self.progress.dismiss()
            self.Exam.reloadData()

        } else if ET == "FA" {
            Alamofire.request(.GET, "http://www.wis.com/index.php/capp/fa_questions_by_course_id/\(CourseID)/\(EID)")
                .responseJSON { (_, _, data, _) in
                    println(data)
                    let json = JSON(data!)
                    let catCount = json.count
                    for index in 0...catCount-1 {
                        let q = json[index]["QUESTION"].string
                        self.QArray.append(q!)
                        println(self.QArray)
                    }

            }
                        self.progress.dismiss()
                        self.Exam.reloadData()
    }
}

    func numberOfSectionsInTableView(tableView: UITableView) -> Int {
        return 1
    }

    func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return 5
    }


    func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
        if indexPath.row == 0{
            let cell = self.Exam.dequeueReusableCellWithIdentifier("Question") as! QuestionCell

            cell.Questionlabel?.text = QArray[0]
            return cell

        }
        else
        {
            let cell = self.Exam.dequeueReusableCellWithIdentifier("Option") as! OptionCell

            cell.Optionlabel?.text = "Option"
            return cell

        }
    }

Answer 1

You need to reload your tableview inside Alamofire block

And so it will look like

  Alamofire.request(.GET, "http://www.wis.com/index.php/capp/chapter_questions_details/\(CourseID)/\(EID)/10")
            .responseJSON { (_, _, data, _) in
                println(data)
                let json = JSON(data!)
                let catCount = json.count
                for index in 0...catCount-1 {
                    let q = json[index]["QUESTION"].string
                    self.QArray.append(q!)
                    println(self.QArray)
                }
        self.progress.dismiss()
        self.Exam.reloadData()
  }

and yes ofcourse, as per given answers and comments,

func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return self.QArray?.count ?? 0 // will return 0 rows if QArray is empty
}

This may help!