WPF RotateTransform不工作

Question

我发现下面的代码可以让我的图像(Indicator1)旋转。

但我按下按钮就什么都没发生了。

有人知道怎么解决吗？

    private void Button_Click(object sender, RoutedEventArgs e)
    {
        RotateTransform rotateTransform = indicator1.RenderTransform as RotateTransform;

        DoubleAnimation doubleAnimation = new DoubleAnimation();
        doubleAnimation.From = 0;
        doubleAnimation.To = 360;
        doubleAnimation.Duration = new Duration(TimeSpan.FromMilliseconds(10000));

        Storyboard.SetTarget(doubleAnimation, rotateTransform);
        Storyboard.SetTargetProperty(doubleAnimation, new PropertyPath(RotateTransform.AngleProperty));

        Storyboard storyboard = new Storyboard();
        storyboard.RepeatBehavior = RepeatBehavior.Forever;
        storyboard.Children.Add(doubleAnimation);
        storyboard.Begin(this);
    }

Answer 1

你不需要Storyboard。使用Storyboard来自requires a workaround to get the target name lookup to to work后面的代码。我没有研究这件事的确切原因，也不知道这是否一直是个问题。下面的代码有效。

请注意，您现在将在RepeatBehavior上设置DoubleAnimation。

private void Button_Click(object sender, RoutedEventArgs e)
{
    RotateTransform rotateTransform = indicator1.RenderTransform as RotateTransform;

    DoubleAnimation doubleAnimation = new DoubleAnimation();
    doubleAnimation.From = 0;
    doubleAnimation.To = 360;
    doubleAnimation.Duration = new Duration(TimeSpan.FromMilliseconds(10000));

    doubleAnimation.RepeatBehavior = RepeatBehavior.Forever;

    rotateTransform.BeginAnimation(RotateTransform.AngleProperty, doubleAnimation);
}