Navigation controller and Table view with firebase database - uitableview

Question

I have the code below, it's a simple address book fetching Name, Phone and Mail from a Firebase Database. all this worked perfect, until I added a Navigation Controller to get access to the Navigation Bar and search function.
now my Tableview won't show anything from the database, I don't know what it does, but its the Nav controller that is blocking something... please help!!
UPDATE!!: It's not loading func cellForRow, witch ofcause means that numberOfRows is returning 0... If I insert a brakepoint I can see that Handle gets one name from the Database so they are still connected, but something i interfering.
class TableVC: UITableViewController {
var Telefonbog: [String] = []
var Handle: FIRDatabaseHandle?
var Ref: FIRDatabaseReference?
var searchController: UISearchController!
var resultController = UITableViewController()
static var _Mail = ""
static var _Mobil = ""
static var _Navn = ""
override func viewDidLoad()
{
super.viewDidLoad()
self.searchController = UISearchController(searchResultsController: self.resultController)
self.tableView.tableHeaderView = self.searchController.searchBar
Ref = FIRDatabase.database().reference()
Handle = Ref?.child("medarbejder EL").observe(.childAdded, with: { (snapshot) in
if let item = snapshot.value as? String
{
self.Telefonbog.append(item)
self.reloadInputViews()
}
})
}
//opætning af telefonbog i tableview
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int
{
return Telefonbog.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
{
let bog = UITableViewCell(style: .default, reuseIdentifier: "bog")
bog.textLabel?.text = Telefonbog[indexPath.row]
return bog
}
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath)
{
let currentcell = Telefonbog[indexPath.row]
Ref = FIRDatabase.database().reference()
Ref?.child("medarbejder EL").child(currentcell).observeSingleEvent(of: .value, with: { (snapshot) in
let value = snapshot.value as? NSDictionary
let Mail = (value?["Mail"] as? String)!
let Mobil = (value?["Mobil"] as? String)!
TableVC._Mail = Mail
TableVC._Mobil = Mobil
TableVC._Navn = currentcell
self.performSegue(withIdentifier: "kontakt", sender: self)
})
}
}

Answer 1

It seem to be ui update problem. When you get the result, update the ui components asynchronously.
Would you try this? (Swift 2.3)
// Move to a background thread to do some long running work
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)) {
Handle = Ref?.child("medarbejder EL").observe(.childAdded, with: { (snapshot) in
if let item = snapshot.value as? String
{ //Update ui on main-thread
dispatch_async(dispatch_get_main_queue()) {
self.Telefonbog.append(item)
self.reloadInputViews()
/*
* I think your tableView refresh call in "reloadInputViews()"
* If not add this line.
* self.tableView.reloadData()
*/
}
}
})
}