将UIKeyboardFrameEndUserInfoKey转换为视图或窗口坐标 [英] Convert UIKeyboardFrameEndUserInfoKey to View or Window Coordinates

问题描述

对于常量 UIKeyboardFrameEndUserInfoKey ，在Apple文档中说：

For the constant UIKeyboardFrameEndUserInfoKey, in the Apple docs it says:

这些坐标不考虑由于界面定向
改变而应用于窗口内容的任何旋转因子
。因此，在使用它之前，您可能需要将矩形转换为窗口
坐标（使用convertRect：fromWindow：方法）或查看
坐标（使用convertRect：fromView：方法）。

These coordinates do not take into account any rotation factors applied to the window’s contents as a result of interface orientation changes. Thus, you may need to convert the rectangle to window coordinates (using the convertRect:fromWindow: method) or to view coordinates (using the convertRect:fromView: method) before using it.

所以如果我使用 [view1 convertRect：rect fromView：view2]

我将为上述参数插入什么，以使它正确地转换旋转值？即：

What would I insert for the above parameters to get it to convert the rotation values correctly? ie:

view1 =？
rect =？ （我假设的键盘框架）
view2 =？

view1 = ? rect = ? (the keyboard frame I'm assuming) view2 = ?

尝试一些东西，得到一些有趣的东西。

Been trying some things and getting some funny stuff.

推荐答案

第一个视图应该是你的视图。第二个视图应该是nil，意味着窗口/屏幕坐标。因此：

The first view should be your view. The second view should be nil, meaning window/screen coordinates. Thus:

NSDictionary* d = [notification userInfo];
CGRect r = [d[UIKeyboardFrameEndUserInfoKey] CGRectValue];
r = [myView convertRect:r fromView:nil];

现在你的键盘会占据你的视图。如果您的视图是当前视图控制器的视图（或其子视图），则旋转等等现在被考虑。

Now you have the rect that the keyboard will occupy, in terms of your view. If your view is the current view controller's view (or a subview thereof), rotation and so forth are now accounted for.

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