UITableView delete all rows at once

Question

How is it possible to delete all rows from UITableView at once? Because when I reload table view with new data, I am still inserting new rows:

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

    CustomTableViewCell *cell = (CustomTableViewCell*)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[[CustomTableViewCell alloc] initWithFrame:CGRectZero] autorelease];
    }

    //... setting the new cell here ...

    return cell;
}

Thank you.

Answer 1

Do this.

Before you are reloading the table with

[tableView reloadData];

Remove all objects from your tableView array (The array which populated your tableView) For example.

[myArray removeAllObjects];
[tableView reloadData];

Answer 2

FYI, The solution above "Delete all of your dataSource, then call reloadData." sounds like they are advocating this:

TableView.dataSource = nil;
[TableView reloadData];

I tried that and it seemed to work. Except, in iOS 8.1, I got random crashes. And I do mean random, as in, I could execute that code 10x and it would crash 1x. So, I used the recommended answer of:

[myArray removeAllObjects];
[tableView reloadData];

and now I am good.