无法更改 VisualStateManager 过渡持续时间

Question

我已经为我正在创建的控件定义了一些 VisualStates 以淡入叠加层（“ThankYouOverlay”）并带有一条消息：

<VisualStateManager.VisualStateGroups>
    <VisualStateGroup x:Name="CommonStates">
        <VisualStateGroup.Transitions>
            <VisualTransition To="ThankYou" GeneratedDuration="0:0:0.3">
                <Storyboard>
                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ThankYouOverlay" Storyboard.TargetProperty="(UIElement.Visibility)">
                        <DiscreteObjectKeyFrame KeyTime="0:0:0" Value="{x:Static Visibility.Visible}"/>
                    </ObjectAnimationUsingKeyFrames>
                    <DoubleAnimation Storyboard.TargetName="ThankYouOverlay" Storyboard.TargetProperty="(UIElement.Opacity)" To="1" />
                </Storyboard>
            </VisualTransition>
        </VisualStateGroup.Transitions>
        <VisualState x:Name="Normal">
            <Storyboard>
                <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ThankYouOverlay" Storyboard.TargetProperty="(UIElement.Visibility)">
                    <DiscreteObjectKeyFrame KeyTime="0:0:0" Value="{x:Static Visibility.Collapsed}"/>
                </ObjectAnimationUsingKeyFrames>
                <DoubleAnimation Storyboard.TargetName="ThankYouOverlay" Storyboard.TargetProperty="(UIElement.Opacity)" To="0"/>
            </Storyboard>
        </VisualState>
        <VisualState x:Name="ThankYou">
            <Storyboard>
                <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ThankYouOverlay" Storyboard.TargetProperty="(UIElement.Visibility)">
                    <DiscreteObjectKeyFrame KeyTime="0:0:0" Value="{x:Static Visibility.Visible}"/>
                </ObjectAnimationUsingKeyFrames>
                <DoubleAnimation Storyboard.TargetName="ThankYouOverlay" Storyboard.TargetProperty="(UIElement.Opacity)" To="1"/>
            </Storyboard>
        </VisualState>
    </VisualStateGroup>
</VisualStateManager.VisualStateGroups>

此过渡有效，但我无法更改动画持续时间。我玩过 VisualTransition 的 GeneratedDuration 属性和单个动画的 Duration 属性的不同组合，但不管这些变化如何，动画的实际持续时间持续 1 秒（默认值，我假设）。

我错过了什么？如何更改过渡的持续时间？

Answer 1

为了尝试向同事证明这一点，我在 每个 可用的 Duration 属性上指定了一个 Duration... 然后它按我预期的方式工作：

<VisualStateManager.VisualStateGroups>
    <VisualStateGroup x:Name="CommonStates">
        <VisualStateGroup.Transitions>
            <VisualTransition To="ThankYou" GeneratedDuration="0:0:0.3">
                <Storyboard Duration="0:0:0.3">
                    <ObjectAnimationUsingKeyFrames Duration="0:0:0.3" Storyboard.TargetName="ThankYouOverlay" Storyboard.TargetProperty="(UIElement.Visibility)">
                        <DiscreteObjectKeyFrame KeyTime="0:0:0" Value="{x:Static Visibility.Visible}"/>
                    </ObjectAnimationUsingKeyFrames>
                    <DoubleAnimation Duration="0:0:0.3" Storyboard.TargetName="ThankYouOverlay" Storyboard.TargetProperty="(UIElement.Opacity)" To="1" />
                </Storyboard>
            </VisualTransition>
        </VisualStateGroup.Transitions>
        <VisualState x:Name="Normal">
            <Storyboard Duration="0:0:0.3">
                <ObjectAnimationUsingKeyFrames Duration="0:0:0.3" Storyboard.TargetName="ThankYouOverlay" Storyboard.TargetProperty="(UIElement.Visibility)">
                    <DiscreteObjectKeyFrame KeyTime="0:0:0" Value="{x:Static Visibility.Collapsed}"/>
                </ObjectAnimationUsingKeyFrames>
                <DoubleAnimation Duration="0:0:0.3" Storyboard.TargetName="ThankYouOverlay" Storyboard.TargetProperty="(UIElement.Opacity)" To="0"/>
            </Storyboard>
        </VisualState>
        <VisualState x:Name="ThankYou">
            <Storyboard Duration="0:0:0.3">
                <ObjectAnimationUsingKeyFrames Duration="0:0:0.3" Storyboard.TargetName="ThankYouOverlay" Storyboard.TargetProperty="(UIElement.Visibility)">
                    <DiscreteObjectKeyFrame KeyTime="0:0:0" Value="{x:Static Visibility.Visible}"/>
                </ObjectAnimationUsingKeyFrames>
                <DoubleAnimation Duration="0:0:0.3" Storyboard.TargetName="ThankYouOverlay" Storyboard.TargetProperty="(UIElement.Opacity)" To="1"/>
            </Storyboard>
        </VisualState>
    </VisualStateGroup>
</VisualStateManager.VisualStateGroups>

我不太确定哪些是必要的，哪些是多余的。