Swift 4 - OpenCV 3.2 on Xcode 9.0 beta 2

I'm actualy trying to use OpenCV with ARKit to build an AR app. For the past 6 hours I tried everything to install OpenCV on my Swift project but that seems impossible.
I followed this tutorial on Medium and I ended up with 3 new files with the framework : OpenCVWrapper.h and OpenCVWrapper.mm for the wrapper and LittleFarm-Bridging-Header.h for the bridging header, here is the code :

OpenCVWrapper.h

#import <Foundation/Foundation.h>
#import <stdio.h>
@interface OpenCVWrapper : NSObject

- (void) isItWorking;
@end

OpenCVWrapper.mm

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

@implementation OpenCVWrapper

    using namespace std;
    - (void) isItWorking {
        printf("Hey");
    }
    @end

LittleFarm-Bridging-Header.h

#import "OpenCVWrapper.h"

But then I get this error : 'opencv2/opencv.hpp' file not found
I tried to figure what was the problem and I set Framework_Search_Path to $(PROJECT_DIR). That doesn't change anything and if I tried to comment the related line I get this error :
ld: framework not found opencv2
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Edit : In Build Phase > Link Binary with Librairies the framework opencv2 is here.

Thanks in advance for the help !