Xcode下搭建opencv环境碰到的一些问题

写了一学期py－opencv了都快结束了突然又要折腾起c++下来，真实给自己跪了，不过环境基本都搞定了，中间碰到了一些问题这里总结一下：

1. usr/local/include和usr/local/lib的问题就不说了，编译之前要把头文件和动态库都连进去否则会产生dyld: Library not loaded的错误
2. dyld: Library not loaded: cv2.so，有放到cv2.so檔案的, 則是要記得到Build Phases（project target下）內，把選項改為optional
3. Undefined symbols for architecture x86_64:

  "cv::namedWindow(std::__1::basic_string, std::__1::allocator > const&, int)", referenced from:

      _main in main.o

  "cv::imread(std::__1::basic_string, std::__1::allocator > const&, int)", referenced from:

      _main in main.o

  "cv::imshow(std::__1::basic_string, std::__1::allocator > const&, cv::_InputArray const&)", referenced from:

      _main in main.o

ld: symbol(s) not found for architecture x86_64

clang: error: linker command failed with exit code 1 (use -v to see invocation)

C++库和opencv库编译不一致，将XCode的C++ Standard Library改为GNU C++ standard library即可正常编译显示图片。Project Build settings -> APPLE LLVM compiler 4.2 - Language -> C++ Standard Library