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所以我有一个加载控件，如果有效的话，一个用户控件在我的主用户控件顶部显示“正在加载”，防止用户与我的程序交互，直到它被加载。

我想使用视觉状态将“加载”控件的可见性转换为缓慢淡入折叠并在我的程序中的任何其他状态下保持折叠状态。

我目前有我的加载控制：

    <ContentControl x:Name="contentControl" Content="{StaticResource loadingAnimation}">
        <i:Interaction.Triggers>
            <ei:DataTrigger Value="false" Binding="{Binding IsLoadingAnimationVisible}">
                <ei:GoToStateAction StateName="Loaded"/>
            </ei:DataTrigger>
        </i:Interaction.Triggers>
    </ContentControl>

在哪里：

    <VisualStateManager.VisualStateGroups>
        <VisualStateGroup x:Name="VisualStateGroup">
            <VisualStateGroup.Transitions>
                <VisualTransition GeneratedDuration="0:0:0.5" To="Collapsed">
                    <VisualTransition.GeneratedEasingFunction>
                        <CubicEase EasingMode="EaseInOut"/>
                    </VisualTransition.GeneratedEasingFunction>
                </VisualTransition>
                <VisualTransition GeneratedDuration="0:0:0.5" To="Expanded">
                    <VisualTransition.GeneratedEasingFunction>
                        <CubicEase EasingMode="EaseInOut"/>
                    </VisualTransition.GeneratedEasingFunction>
                </VisualTransition>
                <VisualTransition GeneratedDuration="0:0:0.5" To="Loaded">
                    <VisualTransition.GeneratedEasingFunction>
                        <CubicEase EasingMode="EaseInOut"/>
                    </VisualTransition.GeneratedEasingFunction>
                </VisualTransition>
            </VisualStateGroup.Transitions>
            <VisualState x:Name="Expanded">
                <Storyboard>
                    <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)" Storyboard.TargetName="contentControl">
                        <DiscreteObjectKeyFrame KeyTime="0" Value="{x:Static Visibility.Collapsed}"/>
                    </ObjectAnimationUsingKeyFrames>
                </Storyboard>
            </VisualState>
            <VisualState x:Name="Collapsed">
                <Storyboard>
                    <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(FrameworkElement.Width)" Storyboard.TargetName="metaGrid">
                        <EasingDoubleKeyFrame KeyTime="0" Value="0"/>
                    </DoubleAnimationUsingKeyFrames>
                    <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)" Storyboard.TargetName="contentControl">
                        <DiscreteObjectKeyFrame KeyTime="0" Value="{x:Static Visibility.Collapsed}"/>
                    </ObjectAnimationUsingKeyFrames>
                </Storyboard>
            </VisualState>
            <VisualState x:Name="Loaded">
                <Storyboard>
                    <BooleanAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.IsHitTestVisible)" Storyboard.TargetName="contentControl">
                        <DiscreteBooleanKeyFrame KeyTime="0" Value="False"/>
                    </BooleanAnimationUsingKeyFrames>
                    <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Opacity)" Storyboard.TargetName="contentControl">
                        <EasingDoubleKeyFrame KeyTime="0" Value="0"/>
                    </DoubleAnimationUsingKeyFrames>
                </Storyboard>
            </VisualState>
        </VisualStateGroup>
    </VisualStateManager.VisualStateGroups>

现在的问题是，当我触发 Expanded 和 Collapsed 状态时，“Loading” contentControl 变得可见，然后在 0.5 秒内淡入折叠状态。触发 Loaded 状态后，如何将加载控件永久设置为折叠？

编辑

我不确定这是在混合中转换可见性的正确方法（即设置 ishittestvisible = false 和 opacitiy = 0 但这是我认为设置可见性的唯一方法。当我尝试它时，collapsed 似乎没有转换，它会捕捉到折叠）

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1 回答 1

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听起来您想使用Timeline.BeginTimeProperty。使用此属性，您可以延迟Visibility.Collapsed Animation. 理想情况下，您也应该在对象Duration上设置属性。DoubleAnimationUsingKeyFrames尝试这个：

<VisualState x:Name="Collapsed">
    <Storyboard>
        <DoubleAnimationUsingKeyFrames Duration="0:0:5" Storyboard.TargetProperty="(FrameworkElement.Width)" Storyboard.TargetName="metaGrid">
            <EasingDoubleKeyFrame KeyTime="0" Value="0"/>
        </DoubleAnimationUsingKeyFrames>
        <ObjectAnimationUsingKeyFrames BeginTime="0:0:5" Storyboard.TargetProperty="(UIElement.Visibility)" Storyboard.TargetName="contentControl">
            <DiscreteObjectKeyFrame KeyTime="0" Value="{x:Static Visibility.Collapsed}"/>
        </ObjectAnimationUsingKeyFrames>
    </Storyboard>
</VisualState>
于 2014-07-17T12:26:00.963 回答