Qt creator can not include opencv header files

The header files of the modules are in their own directories. E.g., you can find calib3d.hpp in /modules/calib3d/include/opencv2/calib3d. The Makefile created by CMake knows these addresses, hence when you make install the header files are all copied into /usr/local/include/opencv2.

This problem can be solved by going to the project properties and click on the target. In the build settings search "header search path". And there you add "/opt/local/include". By doing this you're telling Xcode to look for the header files in that directory also. Now you can use:

#include <opencv2/opencv.hpp>

If you don't want to do this every time you start a new project you can add the .h and .hpp files to the defaulti include directory Xcode uses. You can find this directory in Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk/usr/include .

You will have to add the binaries to your project as well. For that you go to "build phases" and then add the binaries in the "Link binaries with libraries" section.

I hope this helps you out.