CODEWITHSUNDEEP
iosopencvnamespaces
user678392
user678392

Reputation: 2031

OpenCv for iphone build error

I'm trying to follow this tutorial: http://docs.opencv.org/doc/tutorials/ios/video_processing/video_processing.html

I have followed the steps but in the viewController.h file, it tells you to type "using namespace cv;" near the top of the file.

Xcode sees this as an error. And it won't let me build. How do I fix this?

Using XCode 4.6.3 and I can't tell what version of openCV I'm using but I just downloaded, so it's probably the latest. Also, I know that I've imported the opencv framework.

Here are the lines of code in viewController.h:

 #import <UIKit/UIKit.h>
 #import <opencv2/highgui/cap_ios.h>
 using namespace cv;

 @interface ViewController : UIViewController

 @property (weak, nonatomic) IBOutlet UIButton *button;
 @property (weak, nonatomic) IBOutlet UIImageView *imageView;

 - (IBAction)actionStart:(id)sender;

@end

Upvotes: 3

Views: 857

Answers (1)

Dany Joumaa
Dany Joumaa

Reputation: 2040

Try changing the extension of your ViewController from .m to .mm. That signals to the compiler that you would like to write that piece of code in Objective C++.

Edit: For additional information on how to write code effectively this way, check out this blog post.

Upvotes: 3

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