Pull to refresh in Swift JSON data

Question

I have my json file in the web, and I'm retrieving the data to my app from there. My app is about countries, so when I add a new country in my json file, I want to go to my app and when I pull I want to show all the counties AND THE NEW country I have created in my json file.

I have added the UIRefreshControl() to my app but it doesn´t refresh and also the "loading icon" never goes away. Here ia an image:

the "loading icon" never disappears

How can I do that when I create a new country in my json file (for example: England) I pull the screen in my app, and then I have in my App all the countries + England. And make the "loading icon" disappear when all the countries were loaded in the app.

Please help me with this. Thank you very much!

Here is my UIRefreshControl code:

---

import UIKit

class TableController: UITableViewController {

var TableData:Array< String > = Array < String >()

var refresh = UIRefreshControl()

override func viewDidLoad() {
    super.viewDidLoad()

    get_data_from_url("https://mylink")

    refresh.tintColor = UIColor.darkGray

    self.tableView.addSubview(refresh)

}

---

Answer 1

Try the below code:-

   import UIKit

    class TableController: UITableViewController {

    var TableData:Array< String > = Array < String >()

    var refresh = UIRefreshControl()

    override func viewDidLoad() {
        super.viewDidLoad()
        refresh.tintColor = UIColor.darkGray
        refresh.addTarget(self, action: "refresh:", forControlEvents: UIControlEvents.ValueChanged)
        self.tableView.addSubview(refresh)

    }

    func refresh(sender:AnyObject) {
       // Code to refresh table view  
       get_data_from_url("https://mylink") //Call this on different thread and put the below two lines in completion handler of same thread
DispatchQueue.main.sync {
       self.tableView.reloadData()
        self.refreshControl?.endRefreshing()
      }     
 }