Windows Phone 上拉刷新、下拉刷新

最新推荐文章于 2021-11-24 16:38:42 发布

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最新推荐文章于 2021-11-24 16:38:42 发布

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本文展示了一个滚动视图与交互事件结合的应用示例，详细介绍了如何通过事件监听实现滚动视图的头部和尾部触发特定操作。

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ScrollViewer scrollViewer = new ScrollViewer();
// 构造函数
public MainPage()
{
    InitializeComponent();
    for (int x = 0; x <= 30; x++)
    {
        listBox1.Items.Add(x);
    }
}

private double actuableOffset, validStartOffset;
private bool mplStarted;
protected override void OnManipulationStarted(ManipulationStartedEventArgs e)
{
     base.OnManipulationStarted(e);
     mplStarted = true;
}

protected override void OnManipulationCompleted(ManipulationCompletedEventArgs e)
{
     //150是下拉的距离可以自己调适
   if (actuableOffset > 150 && scrollViewer.VerticalOffset == 0)
    {
        MessageBox.Show("Head pull bingo!");
    }
    if (actuableOffset < -150 && scrollViewer.VerticalOffset == scrollViewer.ScrollableHeight)
    {
        MessageBox.Show("Tail pull bingo!");
    }
        base.OnManipulationCompleted(e);
}

protected override void OnMouseMove(MouseEventArgs e)
{
    //head capture startRelative
    if (scrollViewer.VerticalOffset == 0)
    {
        if (mplStarted)
        {
            mplStarted = false;
            validStartOffset = e.GetPosition(null).Y;
         }
         actuableOffset = e.GetPosition(null).Y - validStartOffset;
     }
      //tail
      if (scrollViewer.VerticalOffset == scrollViewer.ScrollableHeight)
      {
          if (mplStarted)
          {
              mplStarted = false;
              validStartOffset = e.GetPosition(null).Y;
          }
          actuableOffset = e.GetPosition(null).Y - validStartOffset;
        }
        //UIControlHelper.FindFirst<Pivot>().Title = actuableOffset;
        base.OnMouseMove(e);
}