WPF - 无法停止的动画故事板，IsControllable不工作？

Question

我有一个3D立方体其中我使用一个共享的故事板动画。动画代码是一个组合框的SelectionChanged事件，旨在确保仍在运行先下一停止任何动画开始;但它的工作不是那样的！

我意识到这是一些相当混乱的代码，但我仍然不明白为什么我的故事板不会响应控制，因为我打电话.begin（这一点，真正的）。

谁能告诉我为什么我不能停止故事板？我仍然收到这个狡猾'System.Windows.Media.Animation Warning: 6 : Unable to perform action because the specified Storyboard was never applied to this object for interactive control.; Action='Stop';'消息

        Storyboard sb = new Storyboard();
    DoubleAnimation forward90 = new DoubleAnimation(0,90,TimeSpan.FromMilliseconds(2000));
    DoubleAnimation back90 = new DoubleAnimation(0,-90, TimeSpan.FromMilliseconds(2000));

private void cbo_SelectionChanged(object sender, SelectionChangedEventArgs e)
    {
        forward90.BeginTime = TimeSpan.Zero;
        back90.BeginTime = TimeSpan.Zero;

        NameScope.SetNameScope(this, new NameScope());

        RegisterName(this.Name, this);

        sb.Stop(this);
        sb.Remove(this);

        sb.Children.Clear();

        sb.AccelerationRatio = 0;
        sb.DecelerationRatio = 1;
        sb.RepeatBehavior = RepeatBehavior.Forever;

        int i = cbo.SelectedIndex;
        Orientation o = (Orientation)i;

        ViewModel vm = this.DataContext as ViewModel;
        if(vm !=null)vm.Orient = o;


        switch (o)
        {
            case Orientation.Front0:

                break;
            case Orientation.Front90:

                sb.Children.Add(forward90);

                Storyboard.SetTarget(forward90, cube2);

                Storyboard.SetTargetProperty(forward90, new PropertyPath(CubeControl.CubeControl.XRotationProperty));
                sb.Begin(this, true);

                break;
            case Orientation.Right0:

                sb.Children.Add(back90);

                Storyboard.SetTarget(back90, cube2);

                Storyboard.SetTargetProperty(back90, new PropertyPath(CubeControl.CubeControl.YRotationProperty));
                sb.Begin(this, true);

                break;
            case Orientation.Right90:

                back90.BeginTime = TimeSpan.FromMilliseconds(2000);

                sb.Children.Add(forward90);
                sb.Children.Add(back90);

                Storyboard.SetTarget(back90, cube2);
                Storyboard.SetTarget(forward90, cube2);

                Storyboard.SetTargetProperty(forward90, new PropertyPath(CubeControl.CubeControl.YRotationProperty));
                Storyboard.SetTargetProperty(back90, new PropertyPath(CubeControl.CubeControl.ZRotationProperty));

                sb.Begin(this, true);

                break;
            case Orientation.Top0:

                sb.Children.Add(back90);

                Storyboard.SetTarget(back90, cube2);
                Storyboard.SetTargetProperty(back90, new PropertyPath(CubeControl.CubeControl.ZRotationProperty));
                sb.Begin(this, true);

                break;
            case Orientation.Top90:

                back90.BeginTime = TimeSpan.FromMilliseconds(2000);

                sb.Children.Add(forward90);
                sb.Children.Add(back90);

                Storyboard.SetTarget(forward90, cube2);
                Storyboard.SetTarget(back90, cube2);

                Storyboard.SetTargetProperty(forward90, new PropertyPath(CubeControl.CubeControl.XRotationProperty));
                Storyboard.SetTargetProperty(back90, new PropertyPath(CubeControl.CubeControl.ZRotationProperty));

                sb.Begin(this, true);
                break;
            default:
                break;
        }
    }
}

Answer 1

我相信你需要在CBO传递，而不是该到开始的方法。

这是指当前类（我想你的窗口类），而它是在CBO的变化，它是控制动画。