reloadData for UITableView doesn't work in a function with completion

Question

I'm trying to call reloadData() function in a calling function using completion handler:

override func viewDidLoad()
{
    super.viewDidLoad()

    let appDel: AppDelegate = UIApplication.shared.delegate as! AppDelegate
    let context: NSManagedObjectContext = appDel.managedObjectContext

    tableView.rowHeight = UITableViewAutomaticDimension

    do{
        var request = NSFetchRequest<NSFetchRequestResult>(entityName: "Actualites")
        let count  = try context.count(for: request)
        if (count == 0) {
            REST().getArticles(limit: 5, limitstart: 0, catid: 6, key: "47347fd312afb0625020028298560d1f", context: context) {  (json) in

                CoreDataHelper().saveArticles(new: true, saveArticles: json, context: context)

                DispatchQueue.main.async {
                    self.tableView.reloadData()
                }
            }
        }

        actualites = try context.fetch(request) as! [Actualites]
    }catch{
        print(error)
    }
    DispatchQueue.main.async {
        self.tableView.reloadData()
    }
}

When I go into the if count... the uiTableView is not reloaded.

Answer 1

actualites = try context.fetch(request) as! [Actualites]

actualities needs to be updated when you get the response data too. The UITableView does not know that this value is filled from a Core data fetch request.

do {
        var request = NSFetchRequest<NSFetchRequestResult>(entityName: "Actualites")
        let count  = try context.count(for: request)
        if (count == 0) {
            REST().getArticles(limit: 5, limitstart: 0, catid: 6, key: "47347fd312afb0625020028298560d1f", context: context) {  (json) in

                CoreDataHelper().saveArticles(new: true, saveArticles: json, context: context)

                DispatchQueue.main.async {
                    actualites = try context.fetch(request) as! [Actualites]
                    self.tableView.reloadData()
                }
            }
        }
    } catch {
        print(error)
    }