Custom popover for iPad/iPhone

In the iBoo开发者_StackOverflowks application, the brightness, font and search views subclass UIPopOverController but without border. Is there any way to mimic those views?

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The border may be from using a UINavigationController for the popup. I'd try using a plain UIViewController instead.

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Here is one https://github.com/werner77/WEPopover the arrow + bg are images, I guess we can replace that with transparent bg.

It can be used with iPhone as well.