title: Get a UIView’s bounds relative to the window?
body: <p>I have a few <code>UIButton</code> instances inside a <code>UIView</code>, which in turn is inside the main <code>UIView</code> of the app. What I’m trying to get is a <code>CGRect</code> of one of the buttons’ frames, relative to the window.</p>
  
  <p>So, for instance, if my inner view is at <code>50, 50</code> in relation to the main view, then the button is at <code>10, 10</code> inside that, I’d want to return <code>60, 60</code>.</p>
  
  <p>Is there an easy way to do that, without having to keep track of parent views and add them up, etc.?</p>