Add # include <opencv2/opencv.hpp> show # # # <list> no symbol found in Xcode PCH

Because OpenCV is written in C + +, you need to add Libc++.dylib to other link compilation options when compiling the iOS project, otherwise there will be many errors.

Then there is the precompiled header file. pch problem, search on the internet, said in the PCH added OPENCV2/OPENCV.HPP will appear after the "# # <list> can't find the issue of symbol, this also and C + + Used in Object-c, and then I add #ifdef __cpluscplus ... #endif就编译通过了

Add # include <opencv2/opencv.hpp> show # # # <list> no symbol found in Xcode PCH