title: Add a checkbox (or similar) to iPhone app using XCode
body: <p>I notice in Objects Library when I'm in editor, there are checkboxes. But they disappear when I go to the storyboard. So is there a way to add a chechbox in iPhone interface or are they meant for other platform? If it's not possible, is there something else that could do the same job? I'm making a search function and I want a criteria to be added in the search if the chechbox is checked, that's why I need something like that. Thanks.</p>