How to declare my very own CGRectZero like constant?

Question

This is a newbie C/Objective-C question :-)

Let say I want a CGRectOne and a CGRectTwo constants.

How can I declare that?

Thanks, Jérémy

Answer 1

There are a couple of options. With C89,

const CGRect CGRectOne = { { 0.0f, 0.0f }, { 1.0f, 1.0f } };

With C99,

const CGRect CGRectOne = {
    .origin.x = 0.0f,
    .origin.y = 0.0f,
    .size.width = 1.0f,
    .size.height = 1.0f
};

or

const CGRect CGRectOne = {
    .origin = { .x = 0.0f, .y = 0.0f },
    .size   = { .width = 1.0f, .height = 1.0f }
};