我正在尝试使用 DoubleAnimation 来更改 StackPanel 的 Height 属性。该代码不会引发任何异常。但动画不起作用。
<StackPanel x:Name="FlyoutContent">
<StackPanel.Resources>
<Storyboard x:Name="HideStackPanel">
<DoubleAnimation Storyboard.TargetName="ChangePasswordPanel" Storyboard.TargetProperty="Height" From="190" To="0" Duration="0:0:1">
<DoubleAnimation.EasingFunction>
<PowerEase EasingMode="EaseIn"></PowerEase>
</DoubleAnimation.EasingFunction>
</DoubleAnimation>
</Storyboard>
<Storyboard x:Name="ShowStackPanel">
<DoubleAnimation Storyboard.TargetName="ChangePasswordPanel" Storyboard.TargetProperty="Height" From="0" To="190" Duration="0:0:1">
<DoubleAnimation.EasingFunction>
<PowerEase EasingMode="EaseIn"></PowerEase>
</DoubleAnimation.EasingFunction>
</DoubleAnimation>
</Storyboard>
</StackPanel.Resources>
<TextBlock Margin="0, 20, 0, 0" FontWeight="Bold" Text="Change Current Password" TextWrapping="Wrap" Style="{StaticResource BasicTextStyle}" HorizontalAlignment="Left" IsTapEnabled="True" Tapped="ChangePasswordHeader_Tapped"/>
<StackPanel x:Name="ChangePasswordPanel" Margin="0, 5, 0, 0" Height="0">
C# 事件处理程序
private void ChangePasswordHeader_Tapped(object sender, TappedRoutedEventArgs e)
{
if (ChangePasswordPanel.Height == 0)
{
ShowStackPanel.Begin();
}
else
{
HideStackPanel.Begin();
}
}
它确实命中 ChangePasswordHeader_Tapped 事件处理程序并按预期执行 ShowStackPanel.Begin 或 HideStackPanel.Begin 语句。但对输出没有任何影响。 StackPanel 的高度保持为 0。
知道发生了什么吗？
我自己想出来了。我所要做的就是在 DoubleAnimation 上启用从属动画 (EnableDependentAnimation)，因为此动画会影响布局。然后它就完美地工作了。
<Storyboard x:Name="HideChangePasswordPanel">
<DoubleAnimation EnableDependentAnimation="True" Storyboard.TargetName="ChangePasswordPanel" Storyboard.TargetProperty="Height" From="190" To="0" Duration="0:0:0.2">
<DoubleAnimation.EasingFunction>
<PowerEase EasingMode="EaseIn"></PowerEase>
</DoubleAnimation.EasingFunction>
</DoubleAnimation>
</Storyboard>
<Storyboard x:Name="ShowChangePasswordPanel">
<DoubleAnimation EnableDependentAnimation="True" Storyboard.TargetName="ChangePasswordPanel" Storyboard.TargetProperty="Height" From="0" To="190" Duration="0:0:0.2">
<DoubleAnimation.EasingFunction>
<PowerEase EasingMode="EaseIn"></PowerEase>
</DoubleAnimation.EasingFunction>
</DoubleAnimation>
</Storyboard>
希望它可以节省一些时间！
本文内容由网友自发贡献，版权归原作者所有，本站不承担相应法律责任。如您发现有涉嫌抄袭侵权的内容，请联系:hwhale#tublm.com(使用前将#替换为@)
