使用AddManipulator触摸操作

Question

使用AddManipulator时，触摸路由到新操作？当我执行以下操作时，一切正常，但TouchLeave事件后仍会触摸。因此，例如，如果我做单个手指旋转，留下被触摸的元素并再次触摸它，它变成两个手指缩放。

private void HV3DTouchDown(object sender, TouchEventArgs e)
{
    Canvas canvas = sender as Canvas
    Manipulation.AddManipulator(canvas, e.TouchDevice.AsManipulator());
    e.Handled = true;
    CaptureTouch(e.TouchDevice);
}

private void HV3DTouchLeave(object sender, TouchEventArgs e)
{
    Canvas canvas = sender as Canvas
    Manipulation.RemoveManipulator(canvas, e.TouchDevice.AsManipulator());
    e.Handled = true;
    ReleaseTouchCapture(e.TouchDevice);
}