title: OpenGL deprecated in IOS 12, how to safely continue to use openGL on ios 12+ device?
body: <p>Apple says that apps built using OpenGL ES will continue to run in iOS 12, but Open GL ES is deprecated in iOS 12. Games and graphics-intensive apps that previously used OpenGL ES should now adopt Metal.</p>
  <p>But I don't want to migrate my app from OpenGL to Metal because it's the same code for Android and I don't want to create two separate branches, so what can I do to continue to use OpenGL in future iOS releases?</p>