On Wed, Mar 19, 2014 at 12:38 AM, Luther Baker <lutherba...@gmail.com>wrote:
> On Wed, Mar 19, 2014 at 12:14 AM, Sixten Otto <hims...@sfko.com> wrote: > >> The significant difference, though, between an abstract class in Java or >> > C#, and a protocol in Objective-C, is that the former may have substantial >> implementation associated with it for the benefit of subclasses, and just >> not be directly instantiable. >> > > The original poster's first paragraph uses and defines the phrase "partial > abstract class" which is what you're describing here. I think we're all > good with what you're saying. But the point to which you are actually > responding to is in regard to a point I made in response to Kyle's > suggestion which had to do with the author's self described "pure abstract > class" which we can infer has NO implementation. > You're right. I missed that qualifier, and in that light, this part of my reply doesn't add anything to the conversation. (I'm hard pressed to think of much use for such a "pure" abstract class, though; what could you do with such a thing that couldn't be done with interfaces.) > And more to the point, I think the original poster already knows what you > are saying. I think he is asking for thoughts regarding his approach to > simulating a notional Abstract Class via mix of @protocols and @classes in > Objective-C. He clearly knows he can't do it with @protocols alone. > >> I did try to address that at the end of my message: > Another way that Objective-C accomplishes some of the same goals is through >> delegation. You don't, for instance, subclass a UITableView to provide its >> data, you provide a delegate that conforms to UITableViewDataSource; which >> protocol does have a couple of required methods. > > _______________________________________________ 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
