Delete Firebase Data located at indexPath.row - objective-c

Question

Been trying to figure this out for a while and I cannot understand why this keeps crashing. I swipe the cell and the delete button shows up, but when pressed it crashes at:
[[[_datRef child:#"posts"]child:index] removeValue];
Crash code is this:
***** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[FIRDataSnapshot length]: unrecognized selector sent to instance 0x61800002a080**
I'm trying to delete the Firebase content at the row that was selected for deletion. Anyone know what I am missing? Please only Objective-C.
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return finalArray.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UpdatesTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"updateCell" forIndexPath:indexPath];
FIRDataSnapshot *snapshot = (self.finalArray)[indexPath.row];
NSString *title = snapshot.value[#"title"];
NSString *description = snapshot.value[#"description"];
NSString *date = snapshot.value[#"date"];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:#"yyyy-MM-dd HH:mm:ss"];
cell.titleLabel.text = title;
cell.updateTextView.text = description;
NSString *timeAgoFormattedDate = [NSDate mysqlDatetimeFormattedAsTimeAgo:date];
cell.dateLabel.text = timeAgoFormattedDate;
cell.updateTextView.delegate = self;
cell.clipsToBounds = YES;
return cell;
}
- (void)getUpdates {
posts = [_datRef child:#"posts"];
[[posts queryOrderedByChild:#"date"] observeEventType:FIRDataEventTypeValue
withBlock:^(FIRDataSnapshot *snapshot) {
self.updatesArray = [NSMutableArray array];
for (snapshot in snapshot.children) {
[self.updatesArray addObject:snapshot];
_sortArray = [updatesArray reverseObjectEnumerator].allObjects;
self.finalArray = [NSMutableArray array];
[self.finalArray addObjectsFromArray:_sortArray];
}
[self.tableView reloadData];
}];
[self.tableView reloadData];
}
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
if (editingStyle == UITableViewCellEditingStyleDelete) {
[[_datRef child:#"posts"] removeValue];
[finalArray removeObjectAtIndex:indexPath.row];
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath]
withRowAnimation:UITableViewRowAnimationFade];
}
}
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
return YES;
}

Answer 1

I found an easier way of doing this. In your post method:
//Create a random string for you child:
NSString *uuid = [NSUUID UUID].UUIDString;
//Put the random string as one of your childs:
[[[_alertRef child:#"posts"] child:uuid] setValue:#{
//create a key called childID and assign it the same value:
#"childID" : uuid,
#"date" : _date,
#"description" : _descriptionTextView.text,
#"title" : _alertTitle.text }];
Now when you go to retrieve your firebase data in your tableView put the data in a dictionary:
- (void)getUpdates {
posts = [_datRef child:#"posts"];
[[posts queryOrderedByChild:#"date"] observeEventType:FIRDataEventTypeValue
withBlock:^(FIRDataSnapshot *snapshot) {
self.updatesArray = [NSMutableArray array];
for (snapshot in snapshot.children) {
[self.updatesArray addObject:snapshot];
_firebaseDict = [[NSDictionary alloc] init];
_firebaseDict = snapshot.value;
_sortArray = [updatesArray reverseObjectEnumerator].allObjects;
self.finalArray = [NSMutableArray array];
[self.finalArray addObjectsFromArray:_sortArray];
}
[self.tableView reloadData];
}];
[self.tableView reloadData];
}
Then in your tableView editing method:
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
if (editingStyle == UITableViewCellEditingStyleDelete) {
NSString *childID = [_firebaseDict valueForKey:#"childID"];
[[[_datRef child:#"posts"] child:childID] removeValue];
[finalArray removeObjectAtIndex:indexPath.row];
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath]
withRowAnimation:UITableViewRowAnimationFade];
}
}