wpf动画同步闪烁

    public class BlinkAnimation : Animatable
     {
         /// <summary>
         /// 单例，保持所有闪烁的动画同步
         /// </summary>
         public static readonly BlinkAnimation Instance = new BlinkAnimation();

         public double BlinkOpacity
         {
             get { return (double)GetValue(BlinkOpacityProperty); }
             set { SetValue(BlinkOpacityProperty, value); }
         }

         // Using a DependencyProperty as the backing store for BlinkOpacity.  This enables animation, styling, binding, etc...
         public static readonly DependencyProperty BlinkOpacityProperty =
             DependencyProperty.Register("BlinkOpacity", typeof(double), typeof(BlinkAnimation), new PropertyMetadata(0.0));

         /// <summary>
         /// 闪烁动画，用于动画同步
         /// </summary>
         public BlinkAnimation()
         {
             try
             {
                 DoubleAnimationUsingKeyFrames doubleAnimation = new DoubleAnimationUsingKeyFrames
                 {
                     RepeatBehavior = RepeatBehavior.Forever,
                     Duration = TimeSpan.FromSeconds(1.5)
                 };

                 DiscreteDoubleKeyFrame ddkf1 = new DiscreteDoubleKeyFrame(0.0, KeyTime.FromTimeSpan(TimeSpan.FromSeconds()));
                 DiscreteDoubleKeyFrame ddkf2 = new DiscreteDoubleKeyFrame(1.0, KeyTime.FromTimeSpan(TimeSpan.FromSeconds(0.75)));

                 doubleAnimation.KeyFrames.Add(ddkf1);
                 doubleAnimation.KeyFrames.Add(ddkf2);

                 if (BlinkOpacityProperty!=null)
                 {
                      BeginAnimation(BlinkOpacityProperty, doubleAnimation);
                 }
             }
             catch (Exception)
             {
                 // ignored
             }
         }

         protected override Freezable CreateInstanceCore()
         {
             return Instance;
         }
     }

使用方法：

   <!--闪烁动画同步控制类-->
             <ObjectDataProvider x:Key="BlinkerOdp"
                                 ObjectType="{x:Type animation:BlinkAnimation}" />

   <Rectangle Fill="White"
                                                                DataContext="{StaticResource BlinkerOdp}"
                                                                Opacity="{Binding BlinkOpacity}"
                                                                x:Name="rect"
                                                                Visibility="Collapsed" />

感谢阅读