On Dec 11, 2008, at 5:34 PM, Martin Wierschin wrote:
[a encodeObject:p forKey:@"root"];
Does using:
[a encodeRootObject:p];
instead of the line above make it work as expected?
A good idea, but IIRC that did not work. In fact, I think it
produced an archive that silently failed to be read back by the
stock +[NSKeyedUnarchiver unarchiveObjectWithFile:] convenience
method.
While the documentation for that method itself makes no mention of
that fact, the documentation at http://developer.apple.com/documentation/Cocoa/Conceptual/Archiving/Tasks/decoding.htm
does say "NSKeyedUnarchiver requires that the object graph in the
archive was encoded with one of NSKeyedArchiver’s convenience class
methods, such as archiveRootObject:toFile:." I'm not sure offhand why
this would be, and it is a bummer, but the "workaround" is to just do
the unarchiving symmetrically to the archiving, that is read the file
into an NSData and then unarchive that using -decodeObject (or -
decodeObjectForKey: if you encode with your own root key(s) after
all). I'll note that I haven't tested this myself again, but that
seems to be what the documentation is saying.
-natevw_______________________________________________
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