title: iOS: verify if a point is inside a rect
body: <p>Is there a way to verify if a <code>CGPoint</code> is inside a specific <code>CGRect</code>?</p>
  <p>An example would be:
  I'm dragging a <code>UIImageView</code> and I want to verify if its central point <code>CGPoint</code> is inside another <code>UIImageView</code>.</p>