OpenCV xcframework cocoapod

It's a temporary repo until xcframework will be supported in official OpenCV cocoapod.

Building opencv2.xcframework

git clone https://github.com/opencv/opencv.git
python3 opencv/platforms/apple/build_xcframework.py --out ./build_xcframework

Grab a coffee, because you'll be here for a while.

Add to your Podfile

pod 'OpenCVXF', :git => 'https://github.com/bakhtiyork/opencv-xf.git'