Question

我有以下问题：

当我将c＃+ xaml页面的方向从横向更改为纵向或反之亦然时，用户可以在屏幕重新计算并重新显示之前在屏幕上看到大的蓝色部分半秒左右渲染。这些斑点看起来像是前一个定位状态的残羹剩饭。

我正在寻找一种隐藏或平滑这种极度粗糙和颠簸过渡的方法。

我尝试添加一个带有ProgressRing的方向更改处理程序来覆盖它1秒，但它没有帮助 - 处理程序在蓝点之后执行。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>

感谢任何帮助，谢谢！

编辑：我通过使用以下方法（以及我的同事的帮助）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;
    }

Answer 1

我知道你标记了这个完整，但由于我无法发表评论，我必须在这里问。你可以用缓和来解决这个问题吗？

Windows 8 Store App平滑方向更改

1 个答案: