Hi all, I am trying to make use of NSPersistentDocument's metadata APIs. I'm having trouble with the 'when' more than the 'how'.
Which method of the saving process should I override to call setMetadata:forPersistentStoreWithURL:error:? All the metadata APIs want the NSURL of the store, which seems to be a problem when a document is saved the first time. <http://developer.apple.com/documentation/Cocoa/Conceptual/ NSPersistentDocumentTutorial/07_Metadata/chapter_8_section_4.html#// apple_ref/doc/uid/TP40002835-SW11> says: "When a document is saved, Core Data calls the NSPersistentDocument method writeToURL:ofType:forSaveOperation:originalContentsURL:error:. You can override this method to add metadata to the new store before it is saved." The sample overrides the method and first does: if ([self fileURL] != nil) [self setMetadataForStoreAtURL:[self fileURL]]; but 'fileURL' returns nil when a document is being saved for the first time. If I try using the URL passed in writeToURL I get the exception "*** -metadataForPersistentStoreWithURL:error: cannot be sent to an abstract object of class NSPersistentStore: Create a concrete instance!" Thanks, -- ____________________________________________________________ Sean McBride, B. Eng [EMAIL PROTECTED] Rogue Research www.rogue-research.com Mac Software Developer Montréal, Québec, Canada _______________________________________________ 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 [EMAIL PROTECTED]
