title: How to get the frame of a view inside another view?
body: <p>I have an <code>UIImageView</code> in the <code>self.view</code> (the main View) and inside it there is a <code>UIButton</code>. I want to know what's the frame of <code>UIButton</code> in <code>self.view</code> not in <code>UIImageView</code>.</p>