On Fri, Apr 25, 2008 at 4:11 AM, an0 <[EMAIL PROTECTED]> wrote:
> Thanks. But it seems you haven't read to the end. As I said in my first mail:
>
> > Besides, I found the value returned by [NSKeyedUnarchiver
>  > unarchiveObjectWithData:data] was nil, but I didn't understand why,
>  > since it was normal when I saved the file using [NSKeyedArchiver
>  > archivedDataWithRootObject:view.drawing].

But you apparently haven't comprehended Jens' message.  You're not
setting *outError to anything, so whoever is calling your method is
seeing that you've returned NO and is expecting whatever it passed in
as outError to point to an NSError object.  Unfortunately this is not
the case and whatever was in that memory location is receiving bogus
messages -- particularly, -localizedFailureReason, which is an NSError
method.

In short, you're breaking the contract for messages which take an
NSError**.  Set *outError to an NSError object (or nil if you're lazy)
if you're going to return a value that signifies an error.

--Kyle Sluder
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