am trying to use UISearchbar with my firebase database but i don't know if my code is rghit or not becuase it's crash everytime i run it and this's my code

var hotelList = [hotelsModel]()

var hotelsArray : [NSDictionary] = 

var filterHotels : [NSDictionary] = 

var databaseRef = Database.database().reference()





databaseRef.child("Hotels").queryOrdered(byChild: "name").observe(.childAdded, with: { (snapshot) in

        self.hotelsArray.append(snapshot.value as! NSDictionary)



        self.tableView.insertRows(at: [IndexPath(row: self.hotelsArray.count-1, section: 0)], with: UITableView.RowAnimation.automatic)

1. 
   

   List item

   
   
   

   }) { (error) in
   
       print(error.localizedDescription)
   
   }
   
   

   
   
   

   func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
   //creating a cell using the custom class
   let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! hotelsTableViewCell

   
   
   

   let hotelSearch : NSDictionary?
   
   //the artist object
   
   var hotel: hotelsModel
   
   //getting the artist of selected position
   
   //hotel = hotelList[indexPath.row]
   
   if searchController.isActive && searchController.searchBar.text != "" {
   
   
   
       hotelSearch = filterHotels[indexPath.row] as! NSDictionary
   
   } else {
   
       //getting the artist of selected position
   
       hotel = hotelList[indexPath.row]
   
   }
   
   
   
   //getting the artist of selected position
   
   hotel = hotelList[indexPath.row]
   
   //adding values to labels
   
   cell.lblName.text = hotel.name
   
   cell.lblLocation.text = hotel.location
   
   cell.appSuggest.text = hotel.appSuggest
   
   cell.price.text = hotel.price
   
   cell.canceletion.text = hotel.cancelation
   
   cell.paymentNeeded.text = hotel.paymentNeeded
   
   
   
   if let imgUrl = hotel.img{
   
       let url = URL(string: imgUrl)
   
       cell.img.kf.setImage(with: url)
   
       cell.img.clipsToBounds = true
   
       cell.img.layer.cornerRadius = 10
   
       cell.img.layer.shadowColor = UIColor.black.cgColor
   
       cell.img.layer.shadowOpacity = 1.8
   
       cell.img.layer.shadowOffset = CGSize(width: 5, height: 0)
   
   }
   
         return cell
   
   

   
   
   

   }
   func updateSearchResults(for searchController: UISearchController) {
   //update the searchbar result
   //filterHotels(serachText:searchController.searchBar.text!)
   filterHotels.removeAll()
   filterHotels = hotelsArray.filter({ (text) -> Bool in
   let tmp: NSString = (text as? NSString ?? nil) ?? ""
   let range = tmp.range(of: searchController.searchBar.text!, options: NSString.CompareOptions.caseInsensitive)
   return range.location != NSNotFound
   })
   self.tableView.reloadData()
   }

   
   

it's crashed in this line

self.hotelsArray.append(snapshot.value as! NSDictionary)

How can I solve this?

Thank You