How can I take zooming into account when a user touches a UIScrollView?
<p>I have a UIImageView inside of a UIScrollView.  The parent scroll view allows zooming and panning.  When the user taps a point in the scroll view, I want to find the location in the raw image inside the UIImageView - i.e. I want the point after including any zooming and panning the user has done in the scroll view.</p>

<p>Right now, I have a UIScrollView subclass called ForwardingScrollView that handles touch events and attempts to convert them into locations in the coordinate system of the child image view.  I tried adding contentOffset to these points, tried multiplying them by zoomScale, and even tried doing both.  I also tried calling [touch locationInView: self] and [touch locationInView: parent], but none of these methods correctly return the point that I clicked in the underlying image.</p>

<p>What's the best way to do this? </p>

<p>Thanks in advance.</p>
