On Nov 13, 2010, at 5:35 PM, William Squires <wsqui...@satx.rr.com> wrote:
> 1) Why is it, when you create a new Cocoa Application (or even some iOS > Applications) in Xcode, does it generate <blahblah>AppDelegate (.h and .m) > files, instead of calling them <blahblah>Controller (.h and .m)? Since these > tie to the <blahblah>.xib - according to MVC paradigm - shouldn't it be a > controller object for the view(s) in the xib (a controller that just so > happens to be a delegate)? After all, it's not called the MVD > (Model-View-Delegate) paradigm! Yeah, I realize this is just a stylistic > thing, but hey, it gives me an excuse to ask this question! Likewise, when > you open the xib in IB, you see a proxy object called <blahblah> App > Delegate. Again, shouldn't this be <blahblah> Controller to maintain the > 'feeling' that you're designing according to the MVC paradigm? The controller layer is a very thick layer, containing many kinds of objects. The purpose of the class created for you is to act as the (NS|UI)Application's delegate, and it conforms to that protocol accordingly. Every controller object in your app could be described as a "MyAppController." "MyAppApplicationDelegate" names the class with the specific role of its instances. The thing in the nib isn't a placeholder. That's the actual app delegate instance. > > 2) How come some NSControls have both a delegate API and a data source API? > I'm thinking mostly of NSTableView and its ilk, such as UITabView. Why not > just have one delegate API that has the data source 'messages' in that > implemented protocol? Because it can be handy to have different objects fulfill each of these roles. You might have a strictly data-related controller act as the data source, but have the window controller fulfill the delegate role. --Kyle Sluder_______________________________________________ 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
