Swift Firebase TableView cannot remove last element - swift

Question

I have a tableview that populates an array. I am able to add to firebase and the tableview reloads to show the newly added object. If I have 5 items in firebase then I would have 5 on the tableview. I am able to remove items from firebase through code and reload the tableview and it works great.
My issue is when I am on the last item on firebase and tableview and I delete that last item, the firebase removes it just fine, but the tableview keeps the last item but grays it out.
The app doesn't crash it just stays there until I add something back in.
Obviously if I tap on that grayed out cell my app crashes because I am tapping an index out of range.
Is there some code that I need to add to prevent this grayed out cell and just have an empty tableview?
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return serviceArray.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "serviceCell", for: indexPath as IndexPath) as! ServiceTableViewCell
let row = indexPath.row
// cell.serviceLogoImage.image = UIImage.init(named: serviceArray[row].serviceUrl!)
cell.serviceNameLabel.text = serviceArray[row].serviceName
if serviceArray[row].serviceStatus == true {
cell.serviceStatusView.backgroundColor = .green
} else {
cell.serviceStatusView.backgroundColor = .red
}
return cell
}
I must be missing a small conditional because other than this the tableview works perfectly with firebase...
Edit 1
I have added the code used to populate the tableview
var serviceArray: [ServiceClass] = []
func pullCardData() {
serviceArray.removeAll()
let cardRef = ref.child("cards")
cardRef.observeSingleEvent(of: .value, with: { snapshot in
for cards in snapshot.children {
let allCardIDs = (cards as AnyObject).key as String
if allCardIDs == self.cardID {
let thisCardLocation = cardRef.child(self.cardID)
thisCardLocation.observeSingleEvent(of: .value, with: { snapshot in
let thisCardDetails = snapshot as FIRDataSnapshot
let cardDict = thisCardDetails.value as! [String: AnyObject]
self.selectedCard.cardID = thisCardDetails.key
self.selectedCard.nickname = cardDict["nickname"] as! String
self.selectedCard.type = cardDict["type"] as! String
self.cardNickNameLabel.text = cardDict["nickname"] as? String ?? ""
let thisCardServices = self.ref.child("cards").child(self.cardID).child("services")
let serviceRefLoc = self.ref.child("services")
thisCardServices.observeSingleEvent(of: .value, with: {serviceSnap in
if serviceSnap.hasChildren() {
for serviceChild in serviceSnap.children {
let serviceID = (serviceChild as AnyObject).key as String
serviceRefLoc.observeSingleEvent(of: .value, with: {allServiceSnap in
if allServiceSnap.hasChildren() {
for all in allServiceSnap.children {
let allServs = (all as AnyObject).key as String
let thisServiceLocationInServiceNode = self.ref.child("services").child(serviceID)
if serviceID == allServs {
thisServiceLocationInServiceNode.observeSingleEvent(of: .value, with: {thisSnap in
let serv = thisSnap as FIRDataSnapshot
let serviceDict = serv.value as! [String: AnyObject]
let aService = ServiceClass()
self.serviceCurrent = serviceDict["serviceStatus"] as? Bool
self.serviceName = serviceDict["serviceName"] as? String
self.serviceURL = serviceDict["serviceURL"] as? String
self.serviceFixedBool = serviceDict["serviceFixed"] as? Bool
self.serviceFixedAmount = serviceDict["serviceAmount"] as? String
aService.serviceUrl = serviceDict["serviceURL"] as! String
aService.serviceName = serviceDict["serviceName"] as! String
aService.serviceStatus = serviceDict["serviceStatus"] as? Bool
aService.serviceID = serviceID
self.serviceArray.append(aService)
self.tableView.reloadData()
})
}
}
}
})
}
}
})
})
}
}
})
}
Edit 2
I had the idea to check if the firebase node even exits (it shouldn't since I just deleted it. SO
func checkIfDataExits() {
ref.observeSingleEvent(of: .value, with: { snapshot in
if snapshot.hasChild("services") {
self.pullCardData()
} else {
self.tableView.endUpdates()
print("no childen")
}
})
}
As expected since I don't have the firebase node there anymore it prints "no children" but it still shows that last tableview cell....so

Answer 1

Well, my last edit was one line of code off from being what I needed.
Instead of
self.tableView.endUpdates()
I replaced it with
self.tableView.reloadData()
So (without retying that long method) I simply wrote another method
func checkIfDataExits() {
serviceArray.removeAll()
ref.observeSingleEvent(of: .value, with: { snapshot in
if snapshot.hasChild("services") {
self.pullCardData()
} else {
self.tableView.reloadData()
}
})
}
And THIS method decides wether or not to even run that long one

Answer 2

resolve:
serviceArray.removeAll()
Code:
ref.observeSingleEvent(of: .value, with: { snapshot in
if snapshot.hasChild("services") {
self.pullCardData()
} else {
//code here
serviceArray.removeAll()
self.tableView.reloadData()
}
})