Question

I included OpenCV in my Xcode project as given here.

Then I declare an openCV Matrix object cv::Mat in my header file.

@interface TestViewController : UIViewController 
{
   cv::Mat myMat;

}

When I try to compile this fails with error, “Type name requires a specifier or qualifier“

The same problem does not happen when I locally declare a cv::Mat object in my .mm files. Also, a sample project I have has the same cv::Mat objects declared in its header files, and that project compiles.

Why does this happen?

Answer 1

Issue was solved when i changed the source file-name extension to .mm.