WPF在XAML中實現持續動畫的暫停、恢復、停止

1.動畫通過EventTrigger監聽按鈕的FrameworkElement.Loaded事件，但控件載入時就進行動畫，

   持續動畫通過<BeginStoryboard Name="yourStoryName">下的<Storyboard>或者子動畫的RepeatBehavior=Forever來實現，

   鼠標的移入移出，通過監聽UIElement.MouseEnter和UIElement.MouseLeave事件，

　鼠標移入時，通過<PauseStoryboard BeginStoryboardName="yourStoryName"/>來暫停動畫，

   鼠標移出時，通過<ResumeStoryboard BeginStoryboardName="yourStoryName"/>來恢復動畫，具體代碼如下：

<Button Content="Click Me">
    <Button.Triggers>
        <EventTrigger RoutedEvent="FrameworkElement.Loaded">
            <BeginStoryboard Name="OpacityStoryboard">
                <Storyboard>
                    <DoubleAnimation Storyboard.TargetProperty="(UIElement.Opacity)"
                        From="0" To="1" RepeatBehavior="Forever" AutoReverse="True" />
                </Storyboard>
            </BeginStoryboard>
        </EventTrigger>
        <EventTrigger RoutedEvent="UIElement.MouseEnter">
            <PauseStoryboard BeginStoryboardName="OpacityStoryboard" />
        </EventTrigger>
        <EventTrigger RoutedEvent="UIElement.MouseLeave">
            <ResumeStoryboard BeginStoryboardName="OpacityStoryboard" />
        </EventTrigger>
    </Button.Triggers>
</Button>

   停止動畫時，使用<StopStoryboard BeginStoryboardName="yourStoryName"/>