Hi Jack, On 26 Apr 2010, at 4:23 PM, Jack Repenning wrote:
> One of my testers (and, naturally, none of the test systems I can get my > hands on) reports this Console error when performing a certain operation: > > -[NSKeyedUnarchiver decodeObjectForKey:]: cannot decode object of class > (NSDictionaryController) > > I think I sorta know what some of it means, but I'm not sure about it all. > > I think it means NSKeyedUnarchiver had trouble. I think NSKeyedUnarchiver is > probably involved in instantiating my nib. The nib involved in the failing > operation does, indeed, have an NSDictionaryController. I guess that the fact > that the message mentions that (relatively unusual) class means > NSKeyedUnarchiver found the nib, and made at least a bit of sense of it all. > > But, does this mean "I found your NSDictionaryController, but something's > wrong with it and I can't decode it"? That is, something busted inside my > NSDC? > > Or, does it mean "I know I'm supposed to be looking for an NSDC, but dang if > I can find the bugger"? It's this one. Well, it means "Hey, I found one, but I don't know how to unpack it." > That is, is there a platform version consideration here? The tester with > the troubles runs Tiger; I build on Snow Leopard using SDK 10.4u and > deployment target 10.4. I haven't heard from any other Tiger testers, > troubled or not, so perhaps this is an SL->Tiger versionitis issue? But > not-so-very-long-ago builds, from this same configuration, work for this > tester, so that seems ruled out. Is Tiger simply not expected to grok Snow > Leopard NSDCs? Tiger is (as you note) 10.4/10.4u; NSDictionaryController is tagged as being available in 10.5 (Leopard) and later. So Tiger's unarchiver doesn't know what to do with an archived NSDictionaryController. There's a setting in Interface Builder which should warn you about this kind of thing - if you're setting the deployment target for the nib correctly then IB should warn you that you're encoding something that 10.4 knows nothing about. .chris -- Chris Parker iPhone (formerly Cocoa) Frameworks Apple Inc. _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
