Question

我希望了解Windows Phone 8.1中的手势或水平滑动事件。我有下面的代码工作正常，但不知道如何理解滑动的状态。无论是向右滑动还是向左滑动。所以我的问题是如何识别左右滑动？

void MainPage_PointerReleased(object sender, PointerRoutedEventArgs e)
        {
            var ps = e.GetIntermediatePoints(null);
            if (ps != null && ps.Count > 0)
            {
                gr.ProcessUpEvent(ps[0]);
                e.Handled = true;
                gr.CompleteGesture();
            }
        }
        void gr_CrossSliding(Windows.UI.Input.GestureRecognizer sender, Windows.UI.Input.CrossSlidingEventArgs args)
        {
            //How to know you swipe left and right

        }
        void MainPage_PointerMoved(object sender, PointerRoutedEventArgs e)
        {
            gr.ProcessMoveEvents(e.GetIntermediatePoints(null));
            e.Handled = true;
        }
        void MainPage_PointerPressed(object sender, PointerRoutedEventArgs e)
        {
            var ps = e.GetIntermediatePoints(null);
            if (ps != null && ps.Count > 0)
            {
                gr.ProcessDownEvent(ps[0]);
                e.Handled = true;
            }
        }

我的构造函数

Windows.UI.Input.CrossSlideThresholds cst = new Windows.UI.Input.CrossSlideThresholds();
cst.SelectionStart = 2;
cst.SpeedBumpStart = 3;
cst.SpeedBumpEnd = 4;
cst.RearrangeStart = 5;
gr.CrossSlideHorizontally = true;
gr.CrossSlideThresholds = cst;
gr.CrossSliding += gr_CrossSliding;

gr.GestureSettings = GestureSettings.CrossSlide;

Answer 1

一个想法是记住按下第一个点的位置，然后在释放后检查相关位置并与重新记录的位置进行比较。这应该可以让用户理解用户移动手指的方向。

此外，如果有可能，您还可以考虑在使用操作事件时使用 Velocities - example at this post。

在Windows Phone 8.1中向左或向右滑动

1 个答案: