Xcode 7 and openCV (no Swift): Core.hpp header must be compiled as C++

Question

I have followed the instructions on how to install OpenCV on an iOS project. However when using Xcode 7 I had to add manually a prefix header. Doing this unfortunately did not h

Answer 1

The solution is almost the same as we do bridging ObjectiveC and swift but we do it between Objective C and C++ so we put the C++ codes in a separate file with (.mm) extension and then import it to your Objective C File (.m)

For example if you have ViewController.h and ViewController.m you add two more files which include your C++ codes lets name it OpenCV.mm and OpenCV.h then import the OpenCV.h inside ViewController.m even before you import anything else. May be this image will help understand it:

Tested on Xcode 11.6 OpenCV Ver 3.4.3