How to add an observer to NSNotificationCenter in a C++ class using Objective-C++?

Question

I have a C++ class that I recently renamed from *.cpp to *.mm to support objective-c. So I can add the following objective-c code.

[[NSNotificationCenter defa         


        

Answer 1

You can't add a C++ method as an observer because of how Objective-C method handles method invocation vs C++. You must have an Objective-C class (Declared with @interface Class .. @end) to respond to those methods.

Your only option is to wrap your C++ class in an Objective-C class, or just have a very light wrapper that just has a reference to an object and calls a method statically once the notification arrives.