c# - 在 WPF 中的动画重复之间暂停

Question

我已将以下 FadeIn/FadeOut 动画应用于 WPF 中的 Canvas。

var fadingInOutAnimation = new DoubleAnimation
{
    From = 1,
    To = 0,
    Duration = new Duration(TimeSpan.FromMilliseconds(1000)),
    AutoReverse = true,
    RepeatBehavior = RepeatBehavior.Forever,
};

MyCanvas.BeginAnimation(OpacityProperty, fadingInOutAnimation);

现在我希望它在到达动画结尾时暂停 1 秒，然后再次重复。

所以是这样的:

Animation --- Pause (1 Sec) --- Animation --- Pause (1 Sec) and so on.

Answer 1

您可以添加一个 Storyboard 来执行自动反转和重复，但持续时间比动画长:

var fadeInOutAnimation = new DoubleAnimation()
{
    From = 1,
    To = 0,
    Duration = TimeSpan.FromSeconds(1),
};

var storyboard = new Storyboard
{
    Duration = TimeSpan.FromSeconds(2),
    AutoReverse = true,
    RepeatBehavior = RepeatBehavior.Forever
};

Storyboard.SetTarget(fadeInOutAnimation, MyCanvas);
Storyboard.SetTargetProperty(fadeInOutAnimation,
                             new PropertyPath(Canvas.OpacityProperty));

storyboard.Children.Add(fadeInOutAnimation);
MyCanvas.BeginStoryboard(storyboard);