just found
http://developer.apple.com/samplecode/ImageBackground/listing3.html after
posting this...going through it to see if I can figure it out :-)
On Tue, May 5, 2009 at 8:41 PM, Malayil George <georg...@gmail.com> wrote:
> Hi, I'm trying to expand on "Styling an NSTableView" at katidev.com in a
> test app of mine. The modification that I have made is that in my subclass
> of NSCell, I have included a new NSImage data element
>
> @interface CustomCell : NSCell {
>
> NSImage *image;
>
> }
>
> @end
>
> In my appController, I set the tableView to use this cell
>
> CustomCell *cell = [[CustomCell alloc] init];
>
> [[tableView tableColumnWithIdentifier:@"Cities"] setDataCell:cell];
>
> [cell release];
>
>
> and I set the image for the cell in my implementation of
>
>
> -(void) tableView:(NSTableView*) aTableView
>
> willDisplayCell:(id) aCell
>
> forTableColumn:(NSTableColumn *) aTableColumn
>
> row:(int) rowIndex
>
>
> When I run the program, it displays the image fine. However, when I click
> on the table row's it crashes. I see that it is deallocing my cell (via an
> NSLog()) in the CustomCell's dealloc method. So, I guess it is crashing as
> the cell is being dealloced, and then in willDisplayCell, it is trying to
> set the image.
>
>
> I tried setting aCell in the willDisplayCell method to a newly allocated
> instance of CustomCell and also tried doing the setDataCell method with that
> new instance. It still crashes...should I be initializing the cell someplace
> else?
>
> Reading the documentation it seems that a single cell is used for all rows
> of the table Column. So, I'm guessing when the application launches it is
> using my initialized customCell for all rows and displaying it without
> deallocing it. However, when I click a row, it deallocs and tries to do the
> same again.
>
> Any pointers on if and when I should be giving the tableView a newly
> allocated instance of the cell? Thanks
>
>
>
> George
>
>
>
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