OpenGL ES on Iphone simulator

i just started to learn it and i'm checking some tutorials to begin with it. I have played with OpenGL and C++ a few months ago and now i decided to try it on iphone, but i'm having a problem after this line code:

- (void)drawFrame
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glLoadIdentity();
}

It says:

Terminating in response to SpringBoard's termination.

Why is that? Do i forgo开发者_开发知识库t something?

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There is nothing wrong with the above code. If you need some help, I used these excellent tutorials on using OpenGL on the iPhone. Maybe they can help you too! Hope that Helps!

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Are you using OpenGL ES 1.1 or 2.0? In 2.0 glLoadIdentity() does not exist anymore check the OpenGL ES 2.0 man pages for what functions are in 2.0.