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Bug with NSTreeController

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Bug with NSTreeController

Subject: Bug with NSTreeController
From: Alexander Hartner <email@hidden>
Date: Sun, 12 Mar 2006 00:25:43 +0000

I starting getting crashes with NSTreeController. My application started crashing constently with *** -[NSCFArray objectAtIndex:]: index (x) beyond bounds (x). After some searching I came across the following link

http://www.cocoadev.com/index.pl?search=NSTreeControllerBug

What you have to do is to use a subclass of NSTreeController and overwrite the setContent methods as follows.

- (void)setContent:(id)content
{
	if(![content isEqual:[self content]])
	{
		NSArray *paths = [[self selectionIndexPaths] retain];
		[super setContent:nil];
		[super setContent:content];
		[self setSelectionIndexPaths:paths];
		[paths release];
	}
}

The site seems to suggest that this bug was isolated to 10.4.3, but I am using 10.4.5 and was experiencing the same problem. I was wondering if this is an actual bug, or if I am doing something wrong. I tried my best to debug this further, without much success. After I implemented the suggested solution, the application did not crash anymore.

Thanks for any feedback.

Alexander Hartner
email@hidden


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