Swift3:带有来自外部数据库的数据填充UitableView

Question

我正在尝试使用外部数据库中的一些数据加载uble。我能够在输出面板中打印所需的数据，但无法在表观视图上获取数据。我怎样才能解决这个问题？

代码：

    import UIKit
    class ViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
    //let myarray = ["item1", "item2", "item3"]

    var group = [Group]()
    @IBOutlet weak var tableview: UITableView!
    override func viewDidLoad() {
        super.viewDidLoad()
        let url = URL(string: "http://www.myurl/myfile.php")
        let task = URLSession.shared.dataTask(with: url! as URL) { data, response, error in
            guard let data = data, error == nil else { return }
            print(NSString(data: data, encoding: String.Encoding.utf8.rawValue))
        }
        task.resume()        
    }
    override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)
        tableview.reloadData()
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }

    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        //return myarray.count
        return 1
    }
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "groupCell", for: indexPath) as! UITableViewCell
       // cell.textLabel?.text = myarray[indexPath.item]
        return cell
    }
}

Answer 1

tableView重新加载，然后再接收数据。完成任务后，您需要重新加载表视图。

let task = URLSession.shared.dataTask(with: url! as URL) { data, response, error in
guard let data = data, error == nil else { return }
print(NSString(data: data, encoding: String.Encoding.utf8.rawValue))
//Store into your array depend on response.
DispatchQueue.main.async() {
    self.tableView.reloadData()
} } task.resume()