[__NSCFString reloadData]: unrecognized selector sent to instance

Question

I've been having trouble adding items to a mutable array and getting those items to populate a UITableView. They currently populate just fine, but after I add one item I get "Unrecognized Selector Sent to Instance" on the [reloadData]; call. I've tried it in a number of different configurations but I cannot seem to get it to work. When I disable reloadData it adds multiple items to the array without issue, but the moment I bring it back is when I get the same error. This is the code that I'm working with:

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{

switch (alertView.tag)
{
    case 0:
        _FiltrationString = [alertView textFieldAtIndex:0].text;
        [_tankFilterArray addObject:_FiltrationString];
        NSLog(@"Number of Filtration Parts Added: %lu", (unsigned long)_tankFilterArray.count);
        break;
    case 1:
        _LightsString = [alertView textFieldAtIndex:0].text;
        [_tankLightsArray addObject:_LightsString];
        NSLog(@"Number of Lights Added: %lu", (unsigned long)_tankLightsArray.count);
        break;
    case 2:
        _MovementString = [alertView textFieldAtIndex:0].text;
        [_tankMovementArray addObject:_MovementString];
        NSLog(@"Number of Water Movement Added: %lu", (unsigned long)_tankMovementArray.count);
        break;
    default:
        break;
}
}

- (void)alertView:(UIAlertView *)alertView willDismissWithButtonIndex:(NSInteger)buttonIndex
{
[_tankFiltration reloadData];
[_tankLights reloadData];
[_tankMovement reloadData];
}

ADDITIONAL CODE

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *cellIdentifier = @"Cell";

UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];

if (!cell)
{
    cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];
}

switch (tableView.tag)
{
    case 0:
        _tankFiltration = [_tankFilterArray objectAtIndex:indexPath.row];
        cell.textLabel.text = [_tankFilterArray objectAtIndex:indexPath.row];
        break;
    case 1:
        _tankLights = [_tankLightsArray objectAtIndex:indexPath.row];
        cell.textLabel.text = [_tankLightsArray objectAtIndex:indexPath.row];
        break;
    case 2:
        _tankMovement = [_tankMovementArray objectAtIndex:indexPath.row];
        cell.textLabel.text = [_tankMovementArray objectAtIndex:indexPath.row];
        break;
    case 3:
        [self performSelector:@selector(saveButton)];
        break;
    default:
        break;
}
cell.textLabel.font = [UIFont systemFontOfSize:14.0f];
cell.textLabel.textColor = [UIColor whiteColor];
return cell;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
if (tableView.tag == 0)
{
    // MAKE FILTRATION TAG HERE
    return _tankFilterArray.count;
}
if (tableView.tag == 1)
{
    // MAKE LIGHTS TAG HERE
    return _tankLightsArray.count;
}
if (tableView.tag == 2)
{
    // MAKE MOVEMENT TAG HERE
    return _tankMovementArray.count;
}

NSLog(@"Tank Movement Array Items: %lu", (unsigned long)_tankMovementArray.count);
NSLog(@"Tank Lights Array Items: %lu", (unsigned long)_tankLightsArray.count);
NSLog(@"Tank Filtration Array Items: %lu", (unsigned long)_tankFilterArray.count);

return _tankMovementArray.count;
return _tankLightsArray.count;
return _tankFilterArray.count;
}

- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
return self;
}

Does anyone have any idea what could be causing this? I've had a few people take a look at it on my side and no one can figure it out. I appreciate the help in advance as always. This issue is proving to be a cascading problem that permeates throughout the rest of my app and makes it difficult for testing.

Updated Edit

Fixed it!

The problem was in cellForRowAtIndexPath. Specifically:

            _tankFiltration = [_tankFilterArray objectAtIndex:indexPath.row];

Was redeclaring the UITableView as an array. I can't believe I didn't see it before. Thank you so much everyone!

Answer 1

If _FiltrationString is an NSString you should be using this command:

  _FiltrationString =  [NSString stringWithFormat:@"%@",[alertView textFieldAtIndex:0].text]; 
  [_tankFilterArray addObject:_FiltrationString];

instead of

       _FiltrationString = [alertView textFieldAtIndex:0].text;

The command equates _FiltrationString to the address of the alert view textfield.