Swift Project With Objective C Wrapper OpenCV

Question

I have just started to use the openCV library and I am trying to get everything set up. I have a swift project and have dowloaded the framework through cocoa pods. I am trying to import the openCV framework in my objective-c file and I keep getting errors. This is my code and the following are the errors.

#import "OpenCVWrapper.h"

//this line causes the errors
#import <opencv2/opencv.hpp>


@implementation OpenCVWrapper
@end

Errors:

Just import openCV .h files in Bridging-Header.h, it doesn't work? — Yun CHEN
– Yun CHEN, Commented Aug 25, 2017 at 5:39
Please check edit. I have already done what you have said and am trying to use the openCV functionality in my objective-c class. — Nikhil Sridhar
– Nikhil Sridhar, Commented Aug 25, 2017 at 5:56
Please check stackoverflow.com/questions/24206732/…, hope it will helpful — Manikanta Chintapalli
– Manikanta Chintapalli, Commented Aug 25, 2017 at 8:17

Nikhil Sridhar · Accepted Answer · 2017-08-25 06:35:04Z

1

After a little digging, I finally found the solution:

Import any Apple headers AFTER those of OpenCV. So the code should look like this:

#import <opencv2/opencv.hpp>
#import "OpenCVWrapper.h"

answered Aug 25, 2017 at 6:35

Nikhil Sridhar

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Ashish Rupareliya · Accepted Answer · 2017-08-25 05:40:13Z

0

You need to add Bridging Header file and import the objective c file in it. after creating a file you need to add the path of this file into Build settings of project Target. Find Bridging Header in build settings. please refer

https://developer.apple.com/library/content/documentation/Swift/Conceptual/BuildingCocoaApps/MixandMatch.html

answered Aug 25, 2017 at 5:40

Ashish Rupareliya

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1 Comment

Nikhil Sridhar Over a year ago

Please check edit. I have already done what you have said and am trying to use the openCV functionality in my objective-c class.

sudo · Accepted Answer · 2023-07-19 12:57:32Z

0

I also faced same problem. I solved it by just changing my Helper.m file to Helper.mm

edited Jul 19, 2023 at 12:57

answered Jul 19, 2023 at 12:56

sudo

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