UITabBarController 像照片应用程序一样用动画隐藏显示栏
我在使用 UITabBarController 时遇到了真正的麻烦。我有一个简单的照片应用程序，我正在尝试模拟与 Iphone 中的 PhotoApp 几乎相同的行为 主视图控制器是选项卡栏本身，我还有一个导航栏和顶部的状态栏。
我想要的是点击隐藏栏（不是使用计时器，只是点击）。 照片实际上是一个 UIScroll 视图，可以缩放照片或使其再次变为 1:1。这部分已经可以工作了，
在将视图推送到导航栏之前我已经尝试过设置 hidesBottomBarWhenPushed 并且它可以工作，但是我无法设置自定义动画，这不是真正的问题，我无法再次显示栏，它们消失了，我不知道如何重新显示它们，我确信我可能错过了一些非常明显的东西，但由于我在 obj C 方面的经验几乎没有半年的兼职时间，我想我在这里问的是 stackoverflow似乎得到了答案:)
i'm having a real trouble with UITabBarController. I have a simple foto app, and I'm trying to simulate almost the same behaviour as the PhotoApp from the Iphone
the main view controler is the tabbar itself, i also have a NavBar and a status bar on top.
What i want is on tap to hide the bars (not with timer, just on tap).
The photo is actually an UIScroll view that zooms the photo or makes it again 1:1. that part already works,
I've tried before pushing the view to the navbar to set the hidesBottomBarWhenPushed and well it works, but i can't set a custom animation, and that's not the real problem , I can't show again the bars, they dissapear and i don't know how to reshow them, i'm sure i'm probably missing someting very obvious, but as my experience in obj C is little like half a year part time, i thought i asked here as stackoverflow seems to get the answers :)
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需要调查的内容：Three20 项目：http://github.com/facebook/ Three20 - 它包括组件形式的照片浏览应用程序的完全克隆。
但如果没有 Three20，您就无法使用普通的
UINavigationController来执行此操作，因为您使用的UIViewController是UINavigationController的子视图。您需要在另一层上创建同级视图。为此，请创建一个父UIViewController，它有两个子视图：您的照片和 UIToolbar。您可以通过设置 UIToolbar 的hidden属性来隐藏和显示 UIToolbar，并使用[parent.view BringSubviewToFront:toolbarController]确保它位于照片视图上方（其中parent是包含照片视图和UIToolbar的主 UIViewController）Something to investigate: the Three20 project: http://github.com/facebook/three20 - it includes a completely clone of the photo-browsing app in component form.
But without Three20, you can't do this with a stock
UINavigationController, because theUIViewControllerthat you're using is a subview of theUINavigationController. You need to make a sibling view on another layer. To do this, make a parentUIViewControllerwhich has two subviews: your photo, and a UIToolbar. You can hide and display the UIToolbar by setting it'shiddenproperty, and make sure it's above the photo view with[parent.view bringSubviewToFront:toolbarController](whereparentis the main UIViewController that contains both the photo view and theUIToolbar)