App Store Buttons

How does the App Store create the "Top Paid" "Top Free" and "Release Date" buttons?

They look like UIBarButtonItems in a UIToolbar but with a catch. The buttons merge together into one longer button. If it is a UIToolbar, I'm n开发者_高级运维ot sure how they connect the buttons so that they appear together like a tab bar ...

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Don't have the iPhone right here, but I think what you want is the UISegmentedControl. Does it look like this?

_{(source: episode-2.com)}

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I think they must be using a UISegmentedControl