On May 28, 2013, at 7:15 AM, Quincey Morris <quinceymor...@rivergatesoftware.com> wrote: > In the broadest MVC terms, the "C" is often a NSWindowController subclass. > The "M" is often the app delegate *or* a NSDocument subclass, or is a more > specialized object graph to which the app delegate or document holds a > reference. The "V" is the window and its contained views.
While it is true that many people use the app delegate as the model (aka a hidden singleton that is a dump for all sorts of stuff), I wouldn't recommend that. The app delegate is intended to provide behaviours for the application as shown in the Dock and Finder, and a root for global properties and actions exposed to AppleScript and other automation/scripting/interapplication communication mechanisms. If you have anything else, you should create a separate (often reusable) class that the application or application delegate creates. For document-based apps, NSApplication already does that by default, but you can modify the behaviour. For shoebox apps and the likes, you create an NSWindowController that implements the main window, and maybe another one for a preferences window. But only create them, keep their specific code out of the application and app delegate as much as possible. Otherwise your app delegate grows into a huge god-object and needs to be recompiled every time one of the other classes is changed even slightly, and worse, may cause all other files in your project to recompile every time you change it to adjust a method another object uses from it. In particular, only few menu items should be implemented by the application itself. Instead, most of them should be hooked up to the First Responder, where each window controller can then claim it using the responder chain when it is frontmost. Cheers, -- Uli Kusterer "The Witnesses of TeachText are everywhere..." http://www.zathras.de _______________________________________________ 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
