how to delete cell and data in firebase and swift 3 - swift

Question

I'm trying to delete the data from firebase with no luck so far. This is the code I'm using, can anyone give me a hand with it please.
class TableViewController: UITableViewController {
var ref: FIRDatabaseReference?
var grocery = [Grocery]()
override func viewDidLoad() {
super.viewDidLoad()
loadData()
}
func loadData() {
let uid = FIRAuth.auth()?.currentUser?.uid
FIRDatabase.database().reference().child("Users").child(uid!).child("Grocery").observe(.childAdded) { (snspshot: FIRDataSnapshot) in
if let dict = snspshot.value as? [String: Any] {
let Items = dict["Item"] as! String
let Quintities = dict["Quintities"] as! String
let Done = dict["Done"] as! Bool
let themBe = Grocery(Items: Items, Quintitiess: Quintities, Dones: Done)
self.grocery.append(themBe)
print(themBe)
self.tableView.reloadData()
}
}
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return grocery.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "TasksTableViewCell") as! TasksTableViewCell
cell.titleLabel?.text = grocery[indexPath.row].Item
cell.numLabel?.text = grocery[indexPath.row].Quintities
return cell
}
override func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
if editingStyle == .delete {
self.grocery.remove(at: indexPath.row)
self.tableView.deleteRows(at: [indexPath], with: .automatic)
}
}
----------
import Foundation
class Grocery {
var Item: String
var Quintities: String
var Done: Bool
init(Items: String, Quintitiess: String, Dones: Bool) {
Item = Items
Quintities = Quintitiess
Done = Dones
}
}

Answer 1

You are only deleting data for your UITableView. The logic that you need is to delete from your UITableView and Fireabase Database. As the firebase docs says you can either call removeValue, or setValue to nil or updateChildValues.
To make the deletion easier, I'd save the key of the object where the data is saved (snapshot.keys), so when you want to delete you can just get that key and perform actions.