Q:

OpenGL deprecated in IOS 12, how to safely continue to use openGL on ios 12+ device?

Apple say 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. 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 2 branch, so how can I do to continue to use OpenGL in futur iOS release ? 

A:

You more or less do not.
Apple has made it abundantly clear that they are not interested in supporting OpenGL ES further on any platform they control. In the future, you will use Metal or you will not have accelerated 3D graphics. Those will be your options.
There are projects that expose OpenGL ES on such platforms by implementing an ES layer on top of Metal. MoltenGL, for example, but that one isn't free apparently.

