c# - 如何在Windows Phone 8 中连续旋转？

Question

我用这段代码进行轮换

void rotate()
{
    Duration Time_duration = new Duration(TimeSpan.FromSeconds(20));
    Storyboard MyStory = new Storyboard();
    MyStory.Duration = Time_duration;
    DoubleAnimation My_Double = new DoubleAnimation();
    My_Double.Duration = Time_duration;
    MyStory.Chil*emphasized text*dren.Add(My_Double);
    RotateTransform MyTransform = new RotateTransform();
    Storyboard.SetTarget(My_Double, MyTransform);
    Storyboard.SetTargetProperty(My_Double, new PropertyPath("Angle"));
    My_Double.To = 270;
    this.maincan.RenderTransform = MyTransform;
    this.maincan.RenderTransformOrigin = new Point(0.5, 0.5);
    //stackPanel1.Children.Add(image1);
    MyStory.Begin();
}

它工作正常，但我想连续旋转图像。

Answer 1

Storyboard 有一个名为 RepeatBehavior 的属性，它允许您控制动画的重复方式。在您的代码中，添加以下行...

MyStory.RepeatBehavior = RepeatBehavior.Forever;  // repeat forever 

或

MyStory.RepeatBehavior = new RepeatBehavior(TimeSpan.FromSeconds(20)); // repeat for 20 seconds

官方文档中有更多例子:

http://msdn.microsoft.com/en-us/library/system.windows.media.animation.timeline.repeatbehavior(v=vs.95).aspx