How dangerous is it to compare floating point values?

Question

I know UIKit uses CGFloat because of the resolution independent coordinate system.

But every time I want to check if for example fram

Answer 1

You can use such code for compare float with zero:

if ((int)(theView.frame.origin.x * 100) == 0) {
    // do important operation
}

This will compare with 0.1 accuracy, that enough for CGFloat in this case.