用于Windows Phone（8.1和10）平台的Xamarin Forms中的滑动手势识别器-Java 学习之路

如何在Windows Phone（8.1和10）平台的Xamarin Forms中最好地实现滑动gesture recognizer？

我看到了很多适用于Android和iOS平台的renderers示例 . 但不适用于WinRT或UWP .

1 回答

我看到很多渲染器的例子都适用于Android和iOS平台 . 但不适用于WinRT或UWP .

目前，Xamarin.Forms没有这样的"SwipeGestureRecognizer" api . 但你可以根据PanGestureRecognizer自定义 SwipeGestureRecognizer . 我已经编写了以下用于模拟"SwipeGestureRecognizer"的代码 . 但我使用的阈值仅用于测试，而不是真实的阈值，您可以根据您的要求修改阈值 .

public enum SwipeDeriction
{
    Left = 0,
    Rigth,
    Above,
    Bottom
}

public class SwipeGestureReconginzer : PanGestureRecognizer
{
    public delegate void SwipeRequedt(object sender, SwipeDerrictionEventArgs e);

    public event EventHandler<SwipeDerrictionEventArgs> Swiped;

    public SwipeGestureReconginzer()
    {
        this.PanUpdated += SwipeGestureReconginzer_PanUpdated;
    }

    private void SwipeGestureReconginzer_PanUpdated(object sender, PanUpdatedEventArgs e)
    {
        if (e.TotalY > -5 | e.TotalY < 5)
        {
            if (e.TotalX > 10)
            {
                Swiped(this, new SwipeDerrictionEventArgs(SwipeDeriction.Rigth));
            }
            if (e.TotalX < -10)
            {
                Swiped(this, new SwipeDerrictionEventArgs(SwipeDeriction.Left));
            }
        }

        if (e.TotalX > -5 | e.TotalX < 5)
        {
            if (e.TotalY > 10)
            {
                Swiped(this, new SwipeDerrictionEventArgs(SwipeDeriction.Bottom));
            }
            if (e.TotalY < -10)
            {
                Swiped(this, new SwipeDerrictionEventArgs(SwipeDeriction.Above));
            }
        }
    }
}

public class SwipeDerrictionEventArgs : EventArgs
{
    public SwipeDeriction Deriction { get; }

    public SwipeDerrictionEventArgs(SwipeDeriction deriction)
    {
        Deriction = deriction;
    }
}

MainPage.xaml.cs

var swipe = new SwipeGestureReconginzer();
  swipe.Swiped += Tee_Swiped;
  TestLabel.GestureRecognizers.Add(swipe);

  private void Tee_Swiped(object sender, SwipeDerrictionEventArgs e)
  {
      switch (e.Deriction)
      {
          case SwipeDeriction.Above:
              {
              }
              break;

          case SwipeDeriction.Left:
              {
              }
              break;

          case SwipeDeriction.Rigth:
              {
              }
              break;

          case SwipeDeriction.Bottom:
              {
              }
              break;

          default:
              break;
      }
  }

回复于 2024-04-19T10:19:14+08:00

用于Windows Phone（8.1和10）平台的Xamarin Forms中的滑动手势识别器

1 回答

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