On Fri, Nov 7, 2008 at 8:41 PM, Jonathan Bailey <[EMAIL PROTECTED]> wrote: > Hi all - > > I am trying to find a way to create a dynamically-growable objective C > data structure within objective C++ code, such as a > NSMutableDictionary, that can store values that are pointers to an > objective C++ or straight-up C++ object. > > NSMutableDictionary seems to only accept pointers to objective C > objects, however, and not to arbitrary objects. This seems like a > simple thing to do but I am a bit stumped. Does anyone know of a way > to do this?
CFMutableDictionary will accept arbitrary pointers, and allows you to provide callbacks so that it knows how to work with them. As an added bonus, CFMutableDictionary is "toll-free bridged" to NSMutableDictionary, meaning that you can simply cast the pointer and use it. The bridging is not 100% with custom callbacks, as there are parts of the NSMutableDictionary API which assume that you are storing only Objective-C objects, but for dictionaries which actually are storing Objective-C objects it's very useful. This also means that you can store it in other Cocoa collections like NSArray, other NSDictionaries, etc. And note that if you're using Objective-C++, there's nothing preventing you from using STL collections for this sort of thing, if they do what you like. Mike _______________________________________________ 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 [EMAIL PROTECTED]
