On Jan 25, 2016, at 5:52 PM, Greg Parker <gpar...@apple.com> wrote: > >> On Jan 24, 2016, at 3:55 PM, Graham Cox <graham....@bigpond.com> wrote: >> >> In Objective-C 2, data members can be moved into a @interface MyClass () >> section which lives in the .m file, rather than in the header file as in the >> classic case. This makes sense - those data members are typically part of >> the private implementation details of a class and not part of the public >> interface. > > Even better, you can move them to @implementation itself. No need for the > extra class extension if everything is used inside a single file. > > >> But is it worth updating older code to follow this convention? I’ve updated >> a lot of older code to declare @properties instead of classic getters and >> setters, and that definitely improves readability. This is a further step >> I’m contemplating but the benefits are less clear. Do you generally think >> this is worth doing? > > A performance gain. @public and @protected ivars each create an exported > symbol; @private and @package ivars do not. Reducing symbol exports can > improve launch time and stripped executable size. Ivars declared in > @implementation or a class extension @interface are @private by default. > Ivars in the primary @interface are @protected by default. Therefore you > should either move your ivars out of the primary @interface, or leave them in > @interface but explicitly declare them @private or @package.
Wow. This is awesome. It also leads directly to the question I had previously, “what are the proper naming conventions for these?” Since a lot of Cocoa relies on visually identifying if the word in question starts with a capital letter, a lowercase letter or an _ to communicate to the programmer the exact nature of the thing they are looking at, what are the proper conventions for these? Yeah, the ivar for an @property called myThing is _myThing and we can know that by looking at it with our eyeballs. How do we extend that type of visual exposure of information of the “thing” being inspected in a similar manner? Do we have any standards for this? If not, should we create some? Thanks. _______________________________________________ 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: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
