I need integrate screen recording function in Unity3D project.

Now I developed AR app in Unity3D using ARKit. I need integrate screen recording function in my AR app. Already I tried everyplay and iVidCap package for it. But everyplay can't save recorded video to camera roll directly(via sharing video only). And iVidCap package is not working in iPhone 6s plus or higher. If you can integrate Object-C or Xcode to Unity3D AR project, it will be grate. Because Screen recording and save to camera roll are very easy in Object-C or Xcode. If you can do it quickly, Please bid.