Nested GLKView and GLKViewController

Question

I\'m new to OpenGL ES and I\'m experimenting with GLKit. My goal is to develop a very simple app just to get a good feel of OpenGL.

I started with Apple\'s sample cod

Answer 1

Ok so I found the answer.

The "OpenGL View Controller" in the picture must be a normal UIViewController. Subclass this view controller and in the viewDidLoad, create programmatically your OpenGL View Controller:

- (void)viewDidLoad
{
    [super viewDidLoad];

    _openGLViewController = [[FZIOpenGLViewController alloc] initWithNibName:@"FZIOpenGLView" bundle:nil];

    _openGLViewController.view.frame = _openGLView.frame;

    [self.view addSubview:_openGLViewController.view];

}

In this code, _openGLView is an IBOutlet representing "GLKit View" in the picture. It's basically just there to get the right dimensions.

_openGLViewController is your GLKViewController subclass that handles everything OpenGL. The .xib file FZIOpenGLView.xib is just a GLKView with the appropriate File Owner (FZIOpenGLViewController).

It works:

_{(source: canardpc.com)}

Answer 2

Instead of the openGLView that is not used (and just takes up memory), you can use the main view dimensions:

_openGLViewController.view.frame = self.view.frame; // instead of _openGLView.frame