iOS OpenGL ES screen rotation while background apps bar visible

Question

My app uses GLKit to render 3D scene with OpenGL ES.

All works fine, except one thing. When I launch my app in iPad and display background apps

Answer 1

Implement the delegate method (if you haven't done it already)

-(void)applicationWillEnterForeground and unpause the GLKViewController from there.

From what I understood from your question you can keep the game paused but resize the glView in this method as well, but without seeing any code is also difficult to really see what's going on.