The UIPopover class allows you to create great looking popovers that extend the functionality of your user interfaces on the iPad. Unfortunately there is no UIPopover implementation on the iPhone.
Werner Altewischer has created an open source library known as WEPopover that allows you to emulate that same functionality on the iPhone. You can also fill it in with whatever custom background you like to give your popover a custom look.
The Github for WEPopover can be found here with source and sample code:
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