Thanks! I don't know why they introduced NSInteger. It sounds like it
would be a subclass of NSNumber.
That didn't seem to be the problem, though. The program still crashes
only when you aren't deleting the first item. I made a movie of it; it's
at http://danielrichman.com/tmp/ToDoList_Problem.mov .
Thanks,
Daniel
Graham Cox wrote:
I ran into a very similar problem just today.
There is an error in your code though, unrelated to my problem, but is
probably yours:
int selectedRow = [((NSNumber *)[tableView selectedRow]) intValue];
-selectedRow simply returns an int, so all that casting to an
NSNumber* and fetching its -intValue is bogus. You want:
int selectedRow = [tableView selectedRow];
(Aside: I think the addition in Leopard of the NSInteger data type is
confusing a lot of people - it's just a typedef for 'int', it's not an
object, and definitely not an NSNumber. But I've seen a few errors
confusing the two lately that didn't seem to happen before).
hth,
Graham
On 21 Jun 2008, at 12:51 pm, Daniel Richman wrote:
I've got an NSTableView that displays the data in an NSMutableArray.
(The program is a to-do list.) I just tried adding a function to
allow you to delete an item: you select the item in the table and
then click delete. My code is as follows:
- (IBAction)deleteItem:(id)sender
{
int selectedRow = [((NSNumber *)[tableView selectedRow]) intValue];
NSLog(@"Selected row is %d", selectedRow);
if (selectedRow != -1) {
NSLog(@"Deleting '%@'", [toDoList objectAtIndex:selectedRow]);
[toDoList removeObjectAtIndex:selectedRow];
[tableView reloadData];
}
}
The problem is that if I try to delete any item other than the very
first one (index 0), the program crashes. I did some log work, which
revealed that the first line is causing problems (int
selectedRow...). But that doesn't explain why the deleting the first
item works ok. I'm stumped. Any ideas?
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