iphone - Dropdown menu within a UITableView -

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i'm looking build or incorporate dropdown menu system app i'm building need figureing out how it's accomplished. best guess i'd have use uiactionsheet, doesn't seem customizable. best example i've come accross within appshopper ios application:

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drop down active: notice how pushed table down, did not overlay menu uiactionsheet might.

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if that's model want follow, looks me expanding view in between selector , table itself. it's not part of table.

from top down: there's nav bar, selector tool bar, "menu" view", table view. menu view of height 0, , expanded necessary (pushing down table view in process).


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