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(0)));
                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