title: iOS function says "CGRectMinY" which should be bottom left corner
body: <p>According to the Apple documentation,</p>
  
  <blockquote>
    <p>CGRectMinY(CGRect) rect returns the y coordinate of the top right corner of the specified rectangle</p>
  </blockquote>
  
  <p>Shouldn't it be the bottom left corner of the rectangle? Because I think the Y-axis is downwards.</p>