在
Windows应用商店中
XAML
<Page
x:Class="FunctionTest.BlankPage1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:FunctionTest"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d">
<Page.Resources>
<Storyboard x:Name="FloatingFlipOver">
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Projection).(PlaneProjection.GlobalOffsetZ)" Storyboard.TargetName="FloatingRoot">
<EasingDoubleKeyFrame KeyTime="0" Value="-2000"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.8" Value="0">
<EasingDoubleKeyFrame.EasingFunction>
<QuarticEase/>
</EasingDoubleKeyFrame.EasingFunction>
</EasingDoubleKeyFrame>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Projection).(PlaneProjection.RotationY)" Storyboard.TargetName="FloatingRoot">
<EasingDoubleKeyFrame KeyTime="0" Value="180"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.8" Value="0">
<EasingDoubleKeyFrame.EasingFunction>
<QuarticEase/>
</EasingDoubleKeyFrame.EasingFunction>
</EasingDoubleKeyFrame>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Opacity)" Storyboard.TargetName="FloatingRoot">
<EasingDoubleKeyFrame KeyTime="0" Value="0"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.2" Value="1"/>
</DoubleAnimationUsingKeyFrames>
</Storyboard>
</Page.Resources>
<Grid>
<Grid x:Name="FloatingRoot" Visibility="Collapsed" Width="500" Height="300">
<Grid.Projection>
<PlaneProjection CenterOfRotationX="0.5" CenterOfRotationY="0.5"/>
</Grid.Projection>
<Rectangle x:Name="FloatingBackground" Fill="SkyBlue" />
<FlipView>
<Grid x:Name="FloatingContainer" Width="300" Height="300">
</Grid>
</FlipView>
</Grid>
<Button Content="Test" HorizontalAlignment="Left" Margin="46,36,0" VerticalAlignment="Top" Click="Test_Click"/>
</Grid>
</Page>
码
private void Test_Click(object sender,RoutedEventArgs e)
{
Button msiBtn = new Button();
msiBtn.Content = "addBtn";
msiBtn.Width = 100; msiBtn.Height = 50;
msiBtn.Tapped += msiBtn_Tapped;
FloatingContainer.Children.Add(msiBtn);
FloatingRoot.Opacity = 0;
FloatingRoot.Visibility = Visibility.Visible;
FloatingFlipOver.Begin();
}
void msiBtn_Tapped(object sender,TappedRoutedEventArgs e)
{
FloatingRoot.Visibility = Visibility.Collapsed;
FloatingContainer.Children.Clear();
}
当与鼠标一起使用时,
但是当我触摸FloatingContainer中添加的按钮时会崩溃,
有时,即使我触摸FloatingContainer(不是按钮),它也会崩溃.
这是一个错误吗？
解决方法
我认为你的意思是崩溃,而不是崩溃,对吗？因为这就是我所看到的.
有一个与ScrollViewers和投影相关的已知错误.我不确定它是否是公开讨论的,但我听说在WinRT XAML Toolkit(在FlipAnimation中)对我有用的解决方法之一似乎也适用于你的情况,因为FlipView有一个ScrollViewer作为其模板的一部分.基本上你需要将ScrollViewer的ZoomMode更改为其他内容并返回,然后它可以正常运行而不会崩溃.为了修复代码片段中的代码,我引用了WinRT XAML Toolkit来使用VisualTreeHelperExtensions来帮助提取ScrollViewer并在动画完成后来回更改ZoomMode,如下所示：
using WinRTXamlToolkit.Controls.Extensions;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Input;
namespace App96
{
public sealed partial class MainPage : Page
{
public MainPage()
{
this.InitializeComponent();
}
private void Test_Click(object sender,RoutedEventArgs e)
{
Button msiBtn = new Button();
msiBtn.Content = "addBtn";
msiBtn.Width = 100; msiBtn.Height = 50;
msiBtn.Tapped += msiBtn_Tapped;
FloatingContainer.Children.Add(msiBtn);
FloatingRoot.Opacity = 0;
FloatingRoot.Visibility = Visibility.Visible;
FloatingFlipOver.Begin();
FloatingFlipOver.Completed -= FloatingFlipOver_Completed;
FloatingFlipOver.Completed += FloatingFlipOver_Completed;
}
void FloatingFlipOver_Completed(object sender,object e)
{
foreach (var sv in FloatingRoot.GetDescendantsOfType<ScrollViewer>())
{
sv.ZoomMode = (ZoomMode)(((int)sv.ZoomMode + 1) % 2);
sv.ZoomMode = (ZoomMode)(((int)sv.ZoomMode + 1) % 2);
}
}
void msiBtn_Tapped(object sender,TappedRoutedEventArgs e)
{
FloatingRoot.Visibility = Visibility.Collapsed;
FloatingContainer.Children.Clear();
}
}
}
VisualTreeHelperExtensions的相关位,如果您不需要整个Toolkit,可以使用它：
public static class VisualTreeHelperExtensions
{
public static IEnumerable<T> GetDescendantsOfType<T>(this DependencyObject start) where T : DependencyObject
{
return start.GetDescendants().OfType<T>();
}
public static IEnumerable<DependencyObject> GetDescendants(this DependencyObject start)
{
var queue = new Queue<DependencyObject>();
var count = VisualTreeHelper.GetChildrenCount(start);
for (int i = 0; i < count; i++)
{
var child = VisualTreeHelper.GetChild(start,i);
yield return child;
queue.Enqueue(child);
}
while (queue.Count > 0)
{
var parent = queue.Dequeue();
var count2 = VisualTreeHelper.GetChildrenCount(parent);
for (int i = 0; i < count2; i++)
{
var child = VisualTreeHelper.GetChild(parent,i);
yield return child;
queue.Enqueue(child);
}
}
}
}
