Windows 8商店应用程序平滑方向改变

我有以下问题:

当我改变我的c#+xaml页面的方向从横向到纵向或反之亦然，在布局被重新计算和重新渲染之前，用户可以在屏幕上看到大的蓝色部分。这些斑点似乎是先前定向状态的残余。

我正在寻找一种方法来隐藏或平滑这个极其粗糙和颠簸的过渡。

我尝试添加一个方向变化处理程序与ProgressRing覆盖它1秒，但它没有帮助-处理程序在蓝色点后执行。这是我的动画StoryBoard的代码

 <!-- The entire page respects the narrower 100-pixel margin convention for portrait -->
            <VisualState x:Name="FullScreenPortrait">
                <Storyboard>
                    <!-- Change the back button and the logo -->
                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="backButton" Storyboard.TargetProperty="Style">
                        <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource PortraitBackButtonStyle}"/>
                    </ObjectAnimationUsingKeyFrames>
                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="headerLogoImage" Storyboard.TargetProperty="Width">
                        <DiscreteObjectKeyFrame KeyTime="0" Value="430"/>
                    </ObjectAnimationUsingKeyFrames>
                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="headerLogoImage" Storyboard.TargetProperty="Height">
                        <DiscreteObjectKeyFrame KeyTime="0" Value="49"/>
                    </ObjectAnimationUsingKeyFrames>
                    <!--Change section title and navButtons to be in two rows, by moving navButtons to the second row, first column-->
                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="navButtons" Storyboard.TargetProperty="(Grid.Row)">
                        <DiscreteObjectKeyFrame KeyTime="0" Value="1"/>
                    </ObjectAnimationUsingKeyFrames>
                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="navButtons" Storyboard.TargetProperty="(Grid.Column)">
                        <DiscreteObjectKeyFrame KeyTime="0" Value="0"/>
                    </ObjectAnimationUsingKeyFrames>
                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="navButtons" Storyboard.TargetProperty="(Grid.ColumnSpan)">
                        <DiscreteObjectKeyFrame KeyTime="0" Value="2"/>
                    </ObjectAnimationUsingKeyFrames>
                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="navButtons" Storyboard.TargetProperty="Margin">
                        <DiscreteObjectKeyFrame KeyTime="0" Value="0,15,0,0"/>
                    </ObjectAnimationUsingKeyFrames>
                    <!--Change the grid-->
                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="itemGridView" Storyboard.TargetProperty="Visibility">
                        <DiscreteObjectKeyFrame KeyTime="0" Value="Collapsed"/>
                    </ObjectAnimationUsingKeyFrames>
                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="itemPortraitGridView" Storyboard.TargetProperty="Visibility">
                        <DiscreteObjectKeyFrame KeyTime="0" Value="Visible"/>
                    </ObjectAnimationUsingKeyFrames>
                </Storyboard>
            </VisualState>

任何帮助都是感激的，谢谢!

编辑:我用下面的方法(在同事的帮助下)解决了这个问题:

/// <summary>
    /// On Orientation change collapse all views, and make visible only the views for the particular new orientation
    /// Also change the font size for portrait mode
    /// </summary>
    /// <param name="sender"></param>
    private async void OnOrientationChanged(object sender)
    {
        headerGrid.Visibility = Visibility.Collapsed;
        itemGridView.Visibility = Visibility.Collapsed;
        itemPortraitGridView.Visibility = Visibility.Collapsed;
        itemListView.Visibility = Visibility.Collapsed;
        //Make the loading spinner temporarily visible and stop it in the StoryBoard animation for every orientation separately
        LoadingView.Visibility = Visibility.Visible;
        //Change the font size
        if (ScreenHelper.IsInPortraitMode())
        {
            _viewModel.FontSizeMethod = _viewModel.GetPortraitFontSize;
        }
        else
        {
            //change font size method back
            _viewModel.FontSizeMethod = _viewModel.GetLandscapeFontSize;
        }
        // Change visibility back to normal in case the xaml approach failed.
        await Task.Delay(1000);
        if (ScreenHelper.IsInPortraitMode())
            itemPortraitGridView.Visibility = Windows.UI.Xaml.Visibility.Visible;
        else if (ApplicationView.Value == ApplicationViewState.Snapped)
            itemListView.Visibility = Windows.UI.Xaml.Visibility.Visible;
        else
            itemGridView.Visibility = Windows.UI.Xaml.Visibility.Visible;
        headerGrid.Visibility = Visibility.Visible;
        LoadingView.Visibility = Visibility.Collapsed;
    }