Grouped UITableView displays fine, but only once

What would cause this?

I have a grouped tableView that I've added in IB. 2 groups. 3 rows in each group.

It displays fine when my app is first run. (So I know I'm doing SOMETHING right. Wouldn't that mean that I (at least) have my Delegate, DataSource, IBOutlets, and connections set up correctly?)

But when I click on a button that calls [myTable reloadData] it just crashes.

Initially, I thought it was due to my changes in the number of groups, number of rows, or changing the data in my dataSource (just a small NSMutableArray).

But the sam开发者_JAVA百科e thing happens when I change NO data: Works fine the first time my tableView is displayed. But crashes when I call [myTable reloadData]. (Whether the data has changed or not.)

I've stripped my code down to a barebones minimum... trying to find this bug.

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

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIndentifer];

    if(cell == nil)
       cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:cellIndentifer] autorelease];

    cell.textLabel.text = @"Left Test"; 
    cell.detailTextLabel.text = @"Right Test";

    return cell;
}

Here's the button-click code:

-(IBAction) reloadTable:(id)sender
{
    if(myTable == nil)
        NSLog(@"myTable is nil");
    else
        [myTable reloadData];
}

Here's the "error" (no help at all):

[Session started at 2010-02-19 10:04:14 -0100.]
GNU gdb 6.3.50-20050815 (Apple version gdb-967) (Tue Jul 14 02:11:58 UTC 2009)
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
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Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i386-apple-darwin".sharedlibrary apply-load-rules all
Attaching to process 1081.
kill
kill
quit

The Debugger has exited with status 0.(gdb) 

I've even tried hard-coding the "number of groups", "number of rows", "header text", "foot text", and "cell text". (In case my math was wrong calculating my objectAtIndex... or I had an array-dataSource that didn't have enough elements.)

Always the same problem: Displays fine the first time. Crashes when I try to reloadData.

Well, if myTable is nil, but the tableview is on the screen, then it's a pretty good indicator that you don't have your IBOutlet properly hooked up. I'll bet if you NSLog(@"%@", myTable); in viewDidLoad (after calling super's, of course), you'll see (null) logged to the console.

When the UITableViewController first loads, the tableview (accessible via [self tableView]) will reloadData, which is why it works once, but won't reload again (because your outlet isn't hooked up).

I'd just ditch the outlet entirely (unless you're not using a UITableViewController) and use [self tableView].