找不到视觉状态组
本文关键字:状态 视觉 找不到 | 更新日期: 2023-09-27 17:55:19
我有一个 UI 控件的 XAML(它继承自按钮),并且其中有各种视觉状态组,如下所示:
<vsm:VisualStateGroup x:Name="CommonStates">
<vsm:VisualState x:Name="Normal"/>
<vsm:VisualState x:Name="MouseOver">
</vsm:VisualState>
<vsm:VisualState x:Name="Pressed">
<Storyboard>
<ColorAnimation Duration="0" To="Green" Storyboard.TargetName="border" Storyboard.TargetProperty="(UIElement.Background).(SolidColorBrush.Color)" />
<DoubleAnimation Duration="0" To="0.94" Storyboard.TargetName="border" Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleX)" />
<DoubleAnimation Duration="0" To="0.94" Storyboard.TargetName="border" Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleY)" />
</Storyboard>
</vsm:VisualState>
<vsm:VisualState x:Name="Disabled">
<Storyboard/>
</vsm:VisualState>
</vsm:VisualStateGroup>
<vsm:VisualStateGroup x:Name="MyState">
<vsm:VisualState x:Name="Pressed_Green">
<Storyboard>
<ColorAnimation Duration="0" To="Yellow" Storyboard.TargetName="border" Storyboard.TargetProperty="(UIElement.Background).(SolidColorBrush.Color)" />
<DoubleAnimation Duration="0" To="0.94" Storyboard.TargetName="border" Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleX)" />
<DoubleAnimation Duration="0" To="0.94" Storyboard.TargetName="border" Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleY)" />
</Storyboard>
</vsm:VisualState>
</vsm:VisualStateGroup>
</vsm:VisualStateManager.VisualStateGroups>
在 onapplytemplte 函数的代码隐藏中,我尝试:
VisualStateManager.GetVisualStateGroups(this).Count
但是返回值是"0",不应该是2吗?
VisualStateManager.VisualStateGroups 设置在控件的控件模板中的根元素上(即 this
),而不是控件本身。您需要为根元素提供一个x:Name
,然后使用 GetTemplateChild 访问它。