Normalising CGRect between 0 and 1

Question

What is the best way to normalise CGRect values so that they are between 0 and 1 (unit coordinate system)?

Answer 1

A very concise way of doing this would be:

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CGAffineTransform t = CGAffineTransformMakeScale(1.0 / parentRect.size.width, 1.0 / parentRect.size.height);
CGRect unitRect = CGRectApplyAffineTransform(rect, t);