/// <summary>
/// 切换场景动画
/// </summary>
/// <param name="index"></param>
private void StepAnimation(int index)
{
Thickness now = MainContent.Margin;
Thickness target = MainContent.Margin;
target.Left = -CONTENT_WIDTH * index;
int time = (int)(Math.Sqrt(Math.Abs(target.Left - now.Left))) * 10;
ThicknessAnimation animation = new ThicknessAnimation(now, target, new Duration(new TimeSpan(0, 0, 0, 0, time)));
MainContent.BeginAnimation(Grid.MarginProperty, animation);
}
