如何手动旋转键盘（带动画）？ [英] How can I manually rotate the keyboard (With animation)?

问题描述

我有一个管理UITextView的控制器。通常，在支持多个接口方向的应用程序中，我将简单地覆盖 -shouldAutorotateToInterfaceOrientation：，设置适当的自动调整大小的掩码，并沿着我的快乐方式。当我沿着我的快乐的方式，如果我开始编辑这个UITextField在，例如，肖像模式，然后旋转设备到横向，键盘将动画很好地横向模式以及视图的其余部分。这是我想要的。

I have a controller that manages a UITextView. Normally, in an app that supports multiple interface orientations, I would simply override -shouldAutorotateToInterfaceOrientation:, set the appropriate auto-resizing masks, and go along my merry way. While going along my merry way, if I were to begin editing this UITextField in, say, portrait mode, then rotate the device to a landscape orientation, the keyboard would animate nicely to landscape mode along with the rest of the view. This is what I want.

现在，在这个特定的应用程序中，我有一个根视图，只有以纵向模式。这是相机预览视图。我也有一个重叠视图的相机视图，我想支持所有的界面方向。这是UITextView所在的位置。

Now, in this particular app, I have a root view that must only ever be in portrait mode. This is a camera preview view. I also have an overlay-view for the camera-view that I would like to have support all interface orientations. This is where the UITextView is located.

所以，作为固定方向根视图的结果，我不能使用内置旋转：我必须手动执行。这不是一个问题，我可以注册 UIDeviceOrientationDidChangeNotification ，并手动为叠加视图动画适当的旋转和框架调整。

So, as a result of the fixed-orientation root view, I cannot use built in rotation: I have to do this manually. This isn't a problem, I can register for the UIDeviceOrientationDidChangeNotification and manually animate the appropriate rotation and frame adjustment for the overlay view.

这样做足以使视图正确定位，但键盘仍然只会以纵向显示。再次，我可以使用UIApplication的 -setStatusBarOrientation：来更正这一点。每次我收到设备已旋转的通知。

That's good enough to get the view positioned correctly, but the keyboard would still only ever show in portrait orientation. Again, I can correct this with UIApplication's -setStatusBarOrientation: every time I get a notification that the device has rotated.

但这就是问题出现的地方。我希望结合：

But that's where the problem arises. I would hope that the combination of:

• 注册轮播通知


• 手动旋转视图
• 
  
• 设置状态栏方向（带动画）

足以完全复制自动轮播行为。但是它在一个重要的方面缺乏：如果键盘被显示在一个方向，然后旋转到另一个方向，键盘将保持原始位置，如 -setStatusBarOrientation：从来没有调用过。据我所知，影响键盘演示的唯一的事情是应用程序的状态栏方向，并且只有一种方法来设置它。所以我失去了运气吗？是否真的不可能像手动旋转一样用手动旋转键盘？

would be enough to exactly replicate the automatic rotation behavior. But it falls short in one important way: If the keyboard were to be shown in one orientation, then rotated to another, the keyboard would remain defiantly in the original position, as if -setStatusBarOrientation: were never called. As far as I know, the only thing that affects the keyboard's presentation is the application's status bar orientation, and there is only the one method for setting it. So am I out of luck? Is it really impossible to make the keyboard rotate with a view manually like it does with auto-rotation?

附录

为了避免覆盖旧地面，我尝试了以下解决方案 hacks：

• 改变，辞职，并立即成为第一响应者。这使得键盘移动到适当的方向，但它没有动画，偶尔会做真的很糟糕的事情，如显示风景大小键盘的肖像，反之亦然。


• 方向变化只是辞职第一反应者。这也有奇怪的行为，即时移动（但不是调整大小）键盘到新的方向，然后用动画解雇它。

推荐答案

我们的一个应用程序执行此操作（因为我们没有'当使用原始设计时，使用疯狂的定位堆栈代码，说不！我记得通过在键盘启动（ickyyyy）时禁用方向来解决此问题。

One of our apps does this (because we didn't say "no!" loudly enough when presented with the original design) using crazy "orientation stack" code. I remember fixing this problem by disabling orientation when the keyboard is up (ickyyyy).

而是考虑通过反向旋转相机预览视图支持旋转，而不是强制VC到仅纵向。如果这看起来有点奇怪，你可以做讨厌的黑客版本：添加相机预览视图作为窗口的子视图，在你的VC视图下，并给你的VC的视图一个透明的背景。

Instead, consider supporting rotation by "counter-rotating" the camera preview view instead of forcing the VC to portrait-only. If this looks a bit odd, you can do the "nasty hack" version: Add the camera preview view as a subview of the window, under your VC's view, and give your VC's view a transparent background.

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