Dear list,
I have developed an app on SL but at all times compiled the app for 10.5. Today
I got my hands on a leopard test machine to try out the app, and I get crashes
due to various things. Some of these I've fixed, but I'm stuck at this one:
Part of the app has an NSTableView filled with strings. I am able to drag these
strings from this 'library of strings' to another NSTextView. This all works
find on SL, but on Leopard it sends the app either in to spinning beachball
mode or it crashes. In the spinning beachball case I have to 'force quit' the
app, and then I get a very long report which I can't extract any useful
information from. The 'crash' actually happens before I reach a dragging
destination, so it must be something at the source end. When the app crashes
(rather than beachballs) I get the following (extract) crash report:
Thread 0 Crashed:
0 com.apple.CoreFoundation 0x00007fff8068e24f
CFDictionaryRemoveValue + 63
1 com.apple.AppKit 0x00007fff80f3cec8 -[NSPasteboard
setData:forType:] + 211
2 com.apple.AppKit 0x00007fff80f3cdcf -[NSPasteboard
setString:forType:] + 122
3 com.mhsoft.TeXnicle 0x0000000100015d7c -[LibraryController
tableView:writeRowsWithIndexes:toPasteboard:] + 651
4 com.apple.AppKit 0x00007fff80ddda72 -[NSTableView
_performDragFromMouseDown:] + 651
5 com.apple.AppKit 0x00007fff80ddbbf8 -[NSTableView
mouseDown:] + 653
6 com.apple.AppKit 0x00007fff80d93783 -[NSWindow
sendEvent:] + 5068
7 com.apple.AppKit 0x00007fff80d60d46 -[NSApplication
sendEvent:] + 5089
8 com.apple.AppKit 0x00007fff80cbb562 -[NSApplication run]
+ 497
9 com.apple.AppKit 0x00007fff80c882f0 NSApplicationMain +
373
10 com.mhsoft.TeXnicle 0x0000000100005d40 main + 33
11 com.mhsoft.TeXnicle 0x00000001000017c0 start + 52
Here's the bit of code that writes the string to the pasteboard:
- (BOOL)tableView:(NSTableView *)aTableView
writeRowsWithIndexes:(NSIndexSet *)rowIndexes
toPasteboard:(NSPasteboard*)pboard
{
if (aTableView == itemsTable) {
NSArray *items = [[contentsController arrangedObjects]
objectsAtIndexes:rowIndexes];
NSMutableArray *strings = [NSMutableArray array];
for (NSDictionary *item in items) {
[strings addObject:[item valueForKey:@"Code"]];
}
// id str = [[strings componentsJoinedByString:@"\n"] retain];
id str = [strings componentsJoinedByString:@"\n"];
NSLog(@"Writing to pboard: %@", str);
return [pboard setString:str forType:NSStringPboardType];
}
return NO;
}
At one point I became unsure about the autoreleased string I create by
'componentsJoinedByString:' and if the pasteboard retains that or now, but I
tested retaining and not, and it doesn't change anything. Can anyone see any
obvious error?
More info: this can really screw up the system pasteboard because sometimes
after this crash I can no longer drag-n-drop text in any app and need to reboot
to get things working again!
I'm hoping to avoid setting up a build environment on the Leopard machine, but
maybe that's a little optimistic.
Any advice gratefully received.
I'd gladly send the app to anyone interested in running it.
The SL working version can be found at:
http://web.me.com/martinhewitson/BOBsoft/TeXnicle.html
Thanks in advance,
Martin
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Martin Hewitson
Albert-Einstein-Institut
Max-Planck-Institut fuer
Gravitationsphysik und Universitaet Hannover
Callinstr. 38, 30167 Hannover, Germany
Tel: +49-511-762-17121, Fax: +49-511-762-5861
E-Mail: martin.hewit...@aei.mpg.de
WWW: http://www.aei.mpg.de/~hewitson
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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