如何使用VisualStateManager隐藏XAML文本块？

我想根据页面的视觉状态隐藏文本块。我使用VisualStateManager更改工作正常的状态。但我隐藏文本块的代码不知何故没有。 附加问题：如果两个状态共享相同的指令，如“窄”和“捕捉”，是否有办法不再使用Keyframes标记编写相同的ObjectAnimation，从而减少要维护的代码量？谢谢

<TextBlock x:Name="Title" FontSize="20" FontWeight="SemiLight" Margin="12,0,0,1"
                                   Text="{Binding TitleTextBlockText}" VerticalAlignment="Center">
                            <VisualStateManager.VisualStateGroups>
                                <!-- Visual states reflect the application's window size -->
                                <VisualStateGroup>
                                    <VisualState x:Name="DefaultLayout">
                                        <Storyboard>
                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Visibility"
                                                                           Storyboard.TargetName="Title">
                                                <DiscreteObjectKeyFrame KeyTime="0">
                                                    <DiscreteObjectKeyFrame.Value>
                                                        Visibility.Visible
                                                    </DiscreteObjectKeyFrame.Value>
                                                </DiscreteObjectKeyFrame>
                                            </ObjectAnimationUsingKeyFrames>
                                        </Storyboard>
                                    </VisualState>
                                    <VisualState x:Name="Normal">
                                        <Storyboard>
                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Visibility"
                                                                           Storyboard.TargetName="Title">
                                                <DiscreteObjectKeyFrame KeyTime="0">
                                                    <DiscreteObjectKeyFrame.Value>
                                                        Visibility.Visible
                                                    </DiscreteObjectKeyFrame.Value>
                                                </DiscreteObjectKeyFrame>
                                            </ObjectAnimationUsingKeyFrames>
                                        </Storyboard>
                                    </VisualState>
                                    <VisualState x:Name="FullScreenLandscape">
                                        <Storyboard>
                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Visibility"
                                                                           Storyboard.TargetName="Title">
                                                <DiscreteObjectKeyFrame KeyTime="0">
                                                    <DiscreteObjectKeyFrame.Value>
                                                        Visibility.Visible
                                                    </DiscreteObjectKeyFrame.Value>
                                                </DiscreteObjectKeyFrame>
                                            </ObjectAnimationUsingKeyFrames>
                                        </Storyboard>
                                    </VisualState>
                                    <VisualState x:Name="FullScreenPortrait">
                                        <Storyboard>
                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Visibility"
                                                                           Storyboard.TargetName="Title">
                                                <DiscreteObjectKeyFrame KeyTime="0">
                                                    <DiscreteObjectKeyFrame.Value>
                                                        Visibility.Visible
                                                    </DiscreteObjectKeyFrame.Value>
                                                </DiscreteObjectKeyFrame>
                                            </ObjectAnimationUsingKeyFrames>
                                        </Storyboard>
                                    </VisualState>
                                    <VisualState x:Name="Filled">
                                        <Storyboard>
                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Visibility"
                                                                           Storyboard.TargetName="Title">
                                                <DiscreteObjectKeyFrame KeyTime="0">
                                                    <DiscreteObjectKeyFrame.Value>
                                                        Visibility.Visible
                                                    </DiscreteObjectKeyFrame.Value>
                                                </DiscreteObjectKeyFrame>
                                            </ObjectAnimationUsingKeyFrames>
                                        </Storyboard>
                                    </VisualState>

                                    <VisualState x:Name="Snapped">
                                        <Storyboard>
                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Visibility"
                                                                           Storyboard.TargetName="Title">
                                                <DiscreteObjectKeyFrame KeyTime="0">
                                                    <DiscreteObjectKeyFrame.Value>
                                                        Visibility.Collapsed
                                                    </DiscreteObjectKeyFrame.Value>
                                                </DiscreteObjectKeyFrame>
                                            </ObjectAnimationUsingKeyFrames>
                                        </Storyboard>
                                    </VisualState>
                                    <VisualState x:Name="Narrow">
                                        <Storyboard>
                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Visibility"
                                                                           Storyboard.TargetName="Title">
                                                <DiscreteObjectKeyFrame KeyTime="0">
                                                    <DiscreteObjectKeyFrame.Value>
                                                        Visibility.Collapsed
                                                    </DiscreteObjectKeyFrame.Value>
                                                </DiscreteObjectKeyFrame>
                                            </ObjectAnimationUsingKeyFrames>
                                        </Storyboard>
                                    </VisualState>
                                </VisualStateGroup>
                            </VisualStateManager.VisualStateGroups>
                        </TextBlock>

---

如果您想这样做，例如在自定义控件的模板中，您应该将textbloc包装到网格中。无法对这样的对象设置动画，因为visualstatemanager不能位于将由visualstatemanager本身设置动画的对象的内部。 在控件的通用模板中，类似以下内容：

 <ControlTemplate TargetType="{x:Type local:NumericField}">
          <Grid>
            <VisualStateManager.VisualStateGroups>
              <VisualStateGroup Name="ValidationStates">
                <VisualState Name="Good">
                  <!-- do your things -->
              </VisualStateGroup>
            </VisualStateManager.VisualStateGroups>

            <Border x:Name="ValidationBorderPart"
                    BorderBrush="Black"
                    BorderThickness="1">
              <TextBox x:Name="ValuePart"
                       Foreground="Black"
                       BorderBrush="Transparent"
                       BorderThickness="0"
                       Text="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type local:NumericField}},Path=Representation, Mode=OneWay, UpdateSourceTrigger=PropertyChanged}" />
            </Border>

          </Grid>
        </ControlTemplate>