使用WPF MVVM运行动画

使用MVVM时，在WPF中运行动画的选项有哪些（避免代码隐藏）

我已经在XAML资源中定义了我的动画：

<Storyboard x:Key="showMe">
     <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Visibility">
          <DiscreteObjectKeyFrame KeyTime="0:0:0" Value="{x:Static Visibility.Visible}" />
     </ObjectAnimationUsingKeyFrames>
     <DoubleAnimation Storyboard.TargetProperty="Opacity" Duration="0:0:0.5" From="0" To="1" />
</Storyboard>

到目前为止，我已经从代码隐藏运行了动画：

Dim stb As Storyboard = TryCast(FindResource("showMe"), Storyboard)
stb.Begin(imgSomeImage)

---

…但这需要我在代码中处理按钮单击事件，由于MVVM模式，我不想在代码背后处理该事件。

在按钮单击事件中触发情节提要中的动画如何：

<Button>
    OK
    <Button.Triggers>
      <EventTrigger RoutedEvent="Button.Click">
        <EventTrigger.Actions>
          <BeginStoryboard>
            <Storyboard x:Key="showMe">
     <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Visibility">
          <DiscreteObjectKeyFrame KeyTime="0:0:0" Value="{x:Static Visibility.Visible}" />
     </ObjectAnimationUsingKeyFrames>
     <DoubleAnimation Storyboard.TargetProperty="Opacity" Duration="0:0:0.5" From="0" To="1" />
</Storyboard>
          </BeginStoryboard>
        </EventTrigger.Actions>
      </EventTrigger>
    </Button.Triggers>
  </Button>

好啊

从代码隐藏处理动画，同时从ViewModel处理业务逻辑？这是否意味着需要定义按钮的click eventhandler和命令绑定？

Dim stb As Storyboard = TryCast(FindResource("showMe"), Storyboard)
stb.Begin(imgSomeImage)

<Button>
    OK
    <Button.Triggers>
      <EventTrigger RoutedEvent="Button.Click">
        <EventTrigger.Actions>
          <BeginStoryboard>
            <Storyboard x:Key="showMe">
     <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Visibility">
          <DiscreteObjectKeyFrame KeyTime="0:0:0" Value="{x:Static Visibility.Visible}" />
     </ObjectAnimationUsingKeyFrames>
     <DoubleAnimation Storyboard.TargetProperty="Opacity" Duration="0:0:0.5" From="0" To="1" />
</Storyboard>
          </BeginStoryboard>
        </EventTrigger.Actions>
      </EventTrigger>
    </Button.Triggers>
  </Button>