On Wed, Feb 17, 2010 at 2:14 PM, Gustavo Pizano <[email protected] > wrote:
> > On Feb 17, 2010, at 11:03 PM, Jim Correia wrote: > > > On Feb 17, 2010, at 4:41 PM, Gustavo Pizano wrote: > > > >> Maybe I misunderstood I must conform NSCopying protocol also even when > using core data? > > > > If you have an NSCell subclass which adds iVars, you must implement > -copyWithZone: to do correct memory management. > > > > Your -copyWithZone: needs to work correctly within the bounds of the > object ownership rules. > > > > If you have an object iVar which shouldn’t be copied, but is still an > owned reference, then you can (and must) retain it instead in the copy. > > > > (You should do this for all cells with iVars, not just ones with object > iVars, so that your subclass will behave correctly in the future even if > NSCell doesn’t implement its behavior using NSCopyObject.) > > > > - Jim > > Hello Jim > HMM digging more into the problem.. definitely it seems because Im not > copying properly the NSManagedObject Paul Robinson says in one old post: > > "The short answer is that you need to override the setObjectValue: method > (which tries to copy your uncopyable NSManagedObject) in your custom NSCell > to convert your NSManagedObject into an NSValue (which is copyable)." > Overriding setObjectValue: to mess with the object is almost never right. That sets you up for trouble when the framework use -objectValue vs goes directly to the ivar. You shouldn't take random weblog posts as necessarily correct. -Ken Cocoa Frameworks > > > And taking what you said, so if my User ManagedObject returns me the > NSDictionary with the key-value of its attributes, then in the cell I must > set it as an ivar within the method setObjectValue, then implement the > copyWithZone and return the copy of it isn't it? right now I don't have any > ivar in my custom cell.. sooo . := :S. > > Gustavo > > _______________________________________________ > > Cocoa-dev mailing list ([email protected]) > > 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/kenferry%40gmail.com > > This email sent to [email protected] > _______________________________________________ Cocoa-dev mailing list ([email protected]) 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]
