无法获取 UIKeyboardFrameEndUserInfoKey 的横向值

Question

在 iOS 8 之前，我可以使用 UIKeyboardBoundsUserInfoKey 来获取键盘信息。

NSValue *value = [info objectForKey:UIKeyboardBoundsUserInfoKey];

我知道它已经贬值了，从 iOS 8 开始它就不再有效了。我尝试使用 UIKeyboardFrameEndUserInfoKey，但它似乎 return 即使在横向中也是纵向值。当我在 iOS 7 上 NSLog(@"%@", [info objectForKey:UIKeyboardBoundsUserInfoKey]); 时，它会记录 NSRect: {{0, 0}, {162, 568}} 但是当我 NSLog(@"%@", [info objectForKey:UIKeyboardFrameEndUserInfoKey]); 时它会记录 NSRect: {{0, 0}, {568, 162}}

有人知道在 iOS 8 上工作的 valueForKey 会 return 横向模式下的信息吗？还是 "swap" [info objectForKey:UIKeyboardFrameEndUserInfoKey] 中的数值使其横向显示的方法？非常感谢您！

Answer 1

根据docs关于UIKeyboardFrameEndUserInfoKey，

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.

因此，在将矩形存储为 CGRect 或 NSValue 之前，请尝试将其转换为视图坐标，例如：

CGRect rect = [[info objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue];
CGRect convertedRect = [self.view convertRect:rect fromView:nil];
NSValue *value = [NSValue valueWithCGRect:convertedRect];

无法获取 UIKeyboardFrameEndUserInfoKey 的横向值

Can't get landscape value for UIKeyboardFrameEndUserInfoKey

objective-c

ios