Question

我有以下代码：

public MainPage()
{
    this.InitializeComponent();
    this.ManipulationStarting += MainPage_ManipulationStarting;
    this.ManipulationStarted += MainPage_ManipulationStarted;
    this.ManipulationInertiaStarting += MainPage_ManipulationInertiaStarting;
    this.ManipulationDelta += MainPage_ManipulationDelta;
    this.ManipulationCompleted += MainPage_ManipulationCompleted;
}
void MainPage_ManipulationStarting(object sender, ManipulationStartingRoutedEventArgs e)
{
    Debug.WriteLine("MainPage_ManipulationStarting");
}
void MainPage_ManipulationStarted(object sender, ManipulationStartedRoutedEventArgs e)
{
    Debug.WriteLine("MainPage_ManipulationStarted");
}
void MainPage_ManipulationInertiaStarting(object sender, ManipulationInertiaStartingRoutedEventArgs e)
{
    Debug.WriteLine("MainPage_ManipulationInertiaStarting");
}
void MainPage_ManipulationDelta(object sender, ManipulationDeltaRoutedEventArgs e)
{
    Debug.WriteLine("MainPage_ManipulationDelta");
}
void MainPage_ManipulationCompleted(object sender, ManipulationCompletedRoutedEventArgs e)
{
    Debug.WriteLine("MainPage_ManipulationCompleted");
}

但我不知道如何使用Manipulation事件。你能描述一下如何处理向上，向下，向左和向右滑动的手势吗？

Answer 1

操纵事件为您提供翻译值。操纵Delta将持续射击，直到您的操作与惯性一起完成。在这种情况下，检查移动是否是惯性的（正常移动不应被视为滑动）并检测初始位置和当前位置之间的差异。

达到阈值后，触发向上/向下/向左/向右滑动事件。并立即停止操纵，以避免一次又一次地发射相同的事件。

以下代码可以帮助您，

    private Point initialpoint;

    private void Grid_ManipulationStarted_1(object sender, ManipulationStartedRoutedEventArgs e)
    {
        initialpoint = e.Position;
    }

    private void Grid_ManipulationDelta_1(object sender, ManipulationDeltaRoutedEventArgs e)
    {
        if (e.IsInertial)
        {
            Point currentpoint = e.Position;
            if (currentpoint.X - initialpoint.X >= 500)//500 is the threshold value, where you want to trigger the swipe right event
            {
                System.Diagnostics.Debug.WriteLine("Swipe Right");
                e.Complete();
            }
        }
    }

Answer 2

我尝试了XAML爱人的答案，但对我来说并不准确（IsIntertial总是对我不利）。对于想要尝试不同的人，我实现了一些不同的东西（我在此回复了之前相关主题的帖子Handling Swipe Guesture in Windows 8 Grid）。

Answer 3

看一下GestureRecognizer .CrossSliding事件。还有EdgeGesture类和样本：EdgeGesture sample，gestures sample。

处理向上滑动，向下滑动，向左滑动＆amp;在WinRT应用程序中滑动右手势

3 个答案: