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ios - _OBJC_CLASS_$_CvVideoCamera", referenced from...

Hi all,

I am attempting to recreate the very simple opencv iOS example on:

but I am having some issues with the linking.

In my code I have:

#import <opencv2/highgui/cap_ios.h>

and later in the code, I initialize the camera with:

self.videoCamera = [[CvVideoCamera alloc] initWithParentView:cameraView]; self.videoCamera.defaultAVCaptureDevicePosition = AVCaptureDevicePositionFront; self.videoCamera.defaultAVCaptureSessionPreset = AVCaptureSessionPreset352x288; self.videoCamera.defaultAVCaptureVideoOrientation = AVCaptureVideoOrientationPortrait; //self.videoCamera.defaultFPS = 30; self.videoCamera.grayscaleMode = NO;

exactly as the example says.

But when I compile, I have get the linker errors:

Undefined symbols for architecture armv7s: "_OBJC_CLASS_$_CvVideoCamera", referenced from: objc-class-ref in libBlackstoneLibrary.a(BlackstoneLibrary.o) ld: symbol(s) not found for architecture armv7s clang: error: linker command failed with exit code 1 (use -v to see invocation)

Does anyone have any idea how to diagnose this? All my header files seem to be found correctly.

I know there are similar questions on here, but they are all unanswered as well.

Many thanks!