objective-c – iOS 8方向更改：键盘框架无法正确显示

在iOS 8之前,当向应用程序报告时,键盘的位置和宽度/高度始终相对于纵向方向. (例如,Landscape的键盘宽度在y方向,在iPad上为~352像素.)
从iOS 8开始,它已更新为在(物理)视图的左上角始终具有(0,0),宽度/高度反映了您通常在iOS之外预期的x / y方向.如果您之前通过keyboardDidShow的[通知userInfo]等方式定位键盘,那么您将获得不太合理的数字.您可以使用这些内容来考虑iOS8之前的特性：

- (void)keyboardDidShow: (NSNotification *) notification{

    NSDictionary *keyboardInfo = [notification userInfo];
    CGSize keyboardSize = [[keyboardInfo objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;

    UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];
    float height,width;
    if(UIInterfaceOrientationIsPortrait(orientation)){
        width = keyboardSize.width;
        height = keyboardSize.height;
    } else {
        if (floor(NSFoundationVersionNumber) <= NSFoundationVersionNumber_iOS_7_1){
            width = keyboardSize.height;
            height = keyboardSize.width;
        } else {
            width = keyboardSize.width;
            height = keyboardSize.height;
        }
    }

    // Remainder of function
}

哪个可以重构为……

- (void)keyboardDidShow: (NSNotification *) notification{

    NSDictionary *keyboardInfo = [notification userInfo];
    CGSize keyboardSize = [[keyboardInfo objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;

    UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];
    float width = keyboardSize.width;
    float height = keyboardSize.height;
    if(!UIInterfaceOrientationIsPortrait(orientation) && (floor(NSFoundationVersionNumber) <= NSFoundationVersionNumber_iOS_7_1)){
        width = keyboardSize.height;
        height = keyboardSize.width;
    }

    // Remainder of function
}

此外,8.1更新修复了可能与上述更改相关的几个横向/旋转错误.抓住更新,看看是否能解决您的问题.