CGRectIntegral what is the usage of it?

Question

How does one use the CGRectIntegral function? I understand it\'s purpose.

The documentation isn\'t clear on it\'s exact use.

Answer 1

One particular usage is to fix frames that do not align perfectly with on-screen pixels.

See this question: UITextField blurred text

If a label or textfield has a frame that isn't pixel-aligned when rendered to the screen, the text will appear blurred. This can happen if you calculate the frame using division (for example to center it in a parent view).

CGRectIntegral will remove the fractional part of the frame, fixing this problem. Note however that with retina displays a .5 frame value is pixel aligned, but CGRectIntgral will still remove the fractional part.