Cocoaphony

In the last post, we discussed how to wrap simple C++ objects in Objective-C. But how about more complex objects, particularly with shared_ptr? Read more…

Last year, I presented an approach to wrapping C++. Since then, I’ve been introduced to other approaches, particularly from gf who helped me better understand opaque objects. Since I do a lot of cross-language work, I’ve had some opportunity to play with and expand this, and so I’d like to update my C++ wrapping approach.

First, to remind everyone of the problem: you have a C++ object that you want to consume in Objective-C. That’s easy in ObjC++, but if you make an ivar that references a C++ class, then the header file can only be included by ObjC++ classes. This quickly spreads .mm files throughout your project, creating all kinds of headaches. ObjC is a beautiful thing, and C++ is fine, but ObjC++ is a crazy land that should be carefully segregated from civilized code. So how do we do it?

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