How to include OpenCV include into XCode 4 c++ project?
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I have seen posts on this before, but none of the answers seemed to work for me. I just installed OpenCV on my Mac and got it to work fine with g++ from the command line. I installed it using Mac Ports:

    $ sudo port install opencv configure.compiler=llvm-gcc-4.2

To compile with g++, I use the command:

    g++ myfile.cpp -o myprogram -I/opt/local/include -L/opt/local/lib -lopencv_core.2.4.2 -lopencv_calib3d.2.4.2

And my OpenCV include header in the main.cpp file is:

    #include "opencv2/opencv.hpp"

And all works well.

Now, when I tried to include the library in Xcode, it simply says 'opencv2/opencv.hpp' file not found. To include the library in Xcode, I followed some detailed instructions. First, to the project target, I added /opt/local/lib to the library search paths, and /opt/local/include, /opt/local/include/opencv and /opt/local/include/opencv2 to the header search paths under the Build Settings tab. Then I clicked on Build Phases, and to Link Binary With Libraries I added all of the OpenCV .dylib files in /opt/local/lib (all 11 of them). This didn't work. I've tried many other things, including adding to user search paths and setting up "Other Linker Flags" for the target. Nothing worked. It can't find the file. If I use the exact path (#include "/opt/local/include/opencv2/opencv.hpp") it can't find all the other header files.

The version of OpenCV is 2.4.2. I am using Xcode 4.3.3 on OS X Lion 10.7.4. This is a C++ project. Any ideas?