Swift / Firebase Tableview cells not refreshing after child removed - ios

Question

I realize this is a bit of a mess but i'm learning how things work by piecing things together from tutorials and reference materials.
My issue is when I remove a node from firebase, the tableview doesnt update. It's deleted from firebase but the cell remains in the tableview. Although not shown below, i've tried adding the mytableview.reload block of code every where I thought it should go, but I've had no success. Any input is appreciated.
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return eventsList.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = myTableView.dequeueReusableCell(withIdentifier: cellId, for: indexPath) as! ViewControllerTableViewCell
cell.locationLabel.text = eventsList[indexPath.row].location
cell.eventTimeLabel.text = eventsList[indexPath.row].dateTime
cell.eventTypeLabel.text = eventsList[indexPath.row].agencyEventSubtypeCode
cell.agencyIdLabel.text = eventsList[indexPath.row].agencyId
if eventsList[indexPath.row].alarmLevel == "1" {
cell.locationLabel.textColor = UIColor.red
cell.eventTimeLabel.textColor = UIColor.red
cell.eventTypeLabel.textColor = UIColor.red
cell.agencyIdLabel.textColor = UIColor.red
}
return cell
}
ref = Database.database().reference()
fetchData()
}
func fetchData(){
refHandle = ref?.child("caddata").observe(.childAdded, with: { (snapshot) in
if let dictionary = snapshot.value as? [String: Any] {
let event = Events()
event.setValuesForKeys(dictionary)
if event.originatingAction == "CadEventNew" {
self.eventsList.append(event)
DispatchQueue.main.async {
self.myTableView.reloadData()
}
} else if event.originatingAction == "CadCloseEvent" {
self.cadPacketType = event.originatingAction
self.cadEventNumber = event.agencyEventId
self.queryCloseUIDFromDB()
}
}
})
}
func queryCloseUIDFromDB(){
if cadPacketType == "CadCloseEvent" {
let dataRef = ref?.child("caddata")
let queryRef = dataRef?.queryOrdered(byChild: "agencyEventId")
.queryEqual(toValue: cadEventNumber)
queryRef?.observeSingleEvent(of: .value, with: { (snapshot) in
for snap in snapshot.children {
let dataSnap = snap as! DataSnapshot
self.closeUID = dataSnap.key //the uid of each event
if self.closeUID != nil {
self.deleteFromDB()
DispatchQueue.main.async {
self.myTableView.reloadData()
}
}
}
})
}
}
func deleteFromDB () {
if closeUID != nil {
print (cadEventNumber!)
print (closeUID!)
ref?.child("caddata").child(closeUID!).removeValue(completionBlock: { (error, ref) in
if error != nil {
self.fetchData()
print("Error: \(String(describing: error))")
return
}
})
}
print ("\(String(describing: closeUID)) has been removed")
}

Answer 1

You need to fetch the data again after delete,
replace your deleteFromDB method by this one, your fetchData must be executed if error == nil
func deleteFromDB () {
if closeUID != nil {
print (cadEventNumber!)
print (closeUID!)
ref?.child("caddata").child(closeUID!).removeValue(completionBlock: { (error, ref) in
if error != nil {
print("Error: \(String(describing: error))")
return
}
//clean the array
self.eventsList.removeAll()
self.fetchData()
})
}
print ("\(String(describing: closeUID)) has been removed")
}