iPhone dev: adding an overlapping label to the image
<p>I'm trying to figure out a best way to implement the picture-editing capability shown in the native address book app on iPhone.</p>

<p>On the built-in address book, this is how the picture looks like before editing:</p>

<p><img src="http://qkpic.com/2f7d4" alt="qkpic.com/2f7d4"></p>

<p>And after clicking edit, notice how "Edit" overlay is added and the image becomes clickable:</p>

<p><img src="http://qkpic.com/fb2f4" alt="qkpic.com/fb2f4"></p>

<p>What would be the best way to implement something like this? Should I make the image a button from the beginning and have tapping disabled at first? If so, what steps are required to add an overlay/label to the image (in above example, gray border + the text "Edit" is added)</p>
