arrays - 当我用 Swift 制作表格时，数组为空

Question

因此，当我在获取数据函数中打印两个数组时，它具有我想要的值，但是，当我去创建 TableView 时，计数为零并且两个数组都是空的。在过去的几个小时里我一直在尝试解决这个问题，并且也尝试过 NSArrays。

var nameArray = [String]()
var textArray = [String]()

var urlStart = "https://api.deckbrew.com/mtg/cards?"


@IBOutlet weak var cardTitle: UILabel!
@IBOutlet weak var info: UITextView!

class Card: Mappable {
    var name: String?
    var store_url: String?
    var text: String?
    required init?(_ map: Map) {
    }
    func mapping(map: Map) {
        name <- map["name"]
        store_url <- map["store_url"]
        text <- map["text"]
    }
}



override func viewDidLoad() {
    super.viewDidLoad()

    func getData()
    self.tableView.reloadData()

    }


func getData() {

    let myURLString = "https://api.deckbrew.com/mtg/cards/typeahead?q=sele"
    let myURL = NSURL(string: myURLString)!

    var myCardsArray = [Card]()



    let mySession = NSURLSession(configuration: NSURLSessionConfiguration.defaultSessionConfiguration())
    let myDataTask = mySession.dataTaskWithURL(myURL) { (data, response, error) in
        guard error == nil else {
            print("There was error with the task")
            return
        }
        do {
            let jsonData = try NSJSONSerialization.JSONObjectWithData(data!, options: NSJSONReadingOptions.AllowFragments)
            for someCard in jsonData as! NSArray{
                let card = Mapper<Card>().map(someCard)
                myCardsArray.append(card!)

                self.nameArray.append(card!.name!)
                self.textArray.append(card!.text!)

            }
        } catch {
            print("There was an error")
        }
    }

    myDataTask.resume()
}



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

override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int
{
   return nameArray.count
}

override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell
{
    let cell : TableViewCell! = tableView.dequeueReusableCellWithIdentifier("Card") as! TableViewCell

    cell.cardTitle.text = nameArray[indexPath.row] as! String
   cell.cardInfo.text = textArray[indexPath.row] as! String

    return cell as TableViewCell
}




override func didReceiveMemoryWarning() {

}}

Answer 1

使用异步方法获取数据后，您应该在此处重新加载表格 View :

 do {
            let jsonData = try NSJSONSerialization.JSONObjectWithData(data!, options: NSJSONReadingOptions.AllowFragments)
            for someCard in jsonData as! NSArray{
                let card = Mapper<Card>().map(someCard)
                myCardsArray.append(card!)

                self.nameArray.append(card!.name!)
                self.textArray.append(card!.text!)
//////// here
dispatch_async(dispatch_get_main_queue()...) {
  self.tableView.reloadData()
}

            }