Does anyone know how Apple creates their rollover menus in the Contacts "business card" view*? I am trying to replicate that interface in an App I'm writing, but I'm not sure how to get there via XCode. I'm currently running Mavericks... Does anyone know how Apple creates their rollov
阅读背景：
Apple在其联系人应用程序中使用哪种类型的翻转菜单？
来源：互联网
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