Configuration OpenCV for iOS

Discode

Hello there;
I have a problem with integrating opencv library and Qt Creator 4.5.0 on Qt 5.10.0;
following instructions i added opencv to .pro file like this:

macx {
LIBS += -L/usr/local/lib
CONFIG  += link_pkgconfig
PKGCONFIG += opencv
}

and it works properly on Mac; but i tried to deploy it on iOS by adding opencv framework:

ios {
LIBS += \
         -F $$PWD/ios \
         -framework opencv2
}

and it's not working , i have 2 error here ,

"No such file or directory" on #include opencv
"symbol(s) not found for architecture arm64"
would you please help me to show me my mistake and maybe solve it?

Thank you

SGaist

Hi and welcome to devnet,

Did you compile OpenCV for iOS ?
If so, did you compile what architecture did you compile it for ?
If not, how did you obtain it ?

The include statement you show looks wrong, what's the real one ?

Discode

Hi SGaist and Thanks for replay;
I tried compile it and make opencv.framework from an instruction with terminal
and i have a framework file and a folder "build" beside it that's include various architects ;
but seems i did something wrong. (it's not working)

#include "opencv2/opencv.hpp"
#include "opencv2/highgui/highgui.hpp"
#include "opencv2/imgproc/imgproc.hpp"

i am using same codes for Mac and iOS, my codes are working on Mac properly

SGaist

Where did you get the instructions from ?

What exactly do you have in the resulting framework ?

Discode

@SGaist
I use this link to compile opencv framework:
https://docs.opencv.org/2.4/doc/tutorials/introduction/ios_install/ios_install.html

and in result i have a folder "ios" which contains framework and build subfolder
Screenshot
https://drive.google.com/open?id=1S1fN2aSXxcNhobXQxPLqMVM1_PLdNsOY

SGaist

Did you check that the framework you are linking to does indeed contain all the required architectures ?

Discode

@SGaist said in Configuration OpenCV for iOS:

Did you check that the framework you are linking to does indeed contain all the required architectures ?

Yes , i checked architectures before open this topic,

below is getting lipo -info from my framework:
localhost:opencv2.framework username$ lipo -info opencv2
Architectures in the fat file: opencv2 are: armv7 armv7s i386 x86_64 arm64

SGaist

Then did you check that the linker does indeed find your self-built framework of OpenCV ?

Discode

Dear @SGaist :
Actually this "opencv2.framework" is working properly in XCode, i'm not a professional but i think something wrong is linking Qt to framework ;
How i can check that linker in my project ?
Just for remembrance i have the yellow line on "#include "opencv2/opencv.hpp" and tooltip says : "No such file or directory".

SGaist

Just realized:
@Discode said in Configuration OpenCV for iOS:

-F $$PWD/ios

You are using that option wrong, remove that space between the capital F and the $