I look at this widget and it looks like a UIPickerView, however I have not seen anything provided by the iPhone SDK API, which allows only horizontal scrolling. Basically, all this is done vertically. In addition, this collector creates custom graphics, so it may not be.
I am wondering if anyone can determine if this is really a UIPickerView or possibly a hacked UIScrollView? The widget is convenient - and I like its use. I found it in some grocery app in the app store.
Here is a screenshot:

Thanks to everyone.
anon
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