与物体一起移动，直到手指松开或未被触发

Question

我有这个：

private void HandleTouchInput()
{
  while (TouchPanel.IsGestureAvailable)
  {
  // read the next gesture from the queue
  GestureSample gesture = TouchPanel.ReadGesture();
  switch (gesture.GestureType)
  {
     case GestureType.Hold:
     // left
     if (gesture.Position.X < 100 && gesture.Position.Y < 100)
     {
        ship.Position.X -= 5;
     }
     break;
   }
}

（HandleTouchInput在Update方法中）

如何在屏幕上取消（取消）“手指”之前，我可以在开关中重复代码？我不想只改变一次位置，我想改变用户仍然按下确切的位置。感谢

Answer 1

正如NitWit建议的那样，你需要使用原始输入，例如：

protected override void Update(GameTime gameTime)
{
    // TouchPanel.GetState() should be called only once per frame
    TouchCollection touchCollection = TouchPanel.GetState();

    HandleInput(touchCollection);
}

private void HandleInput(TouchCollection touchCollection)
{
    if (touchCollection.Count == 0)
    {
        return;
    }

    TouchLocation touchLocation = touchCollection[0];
    Vector2 touchPosition = touchLocation.Position;

    switch (touchLocation.State)
    {
        case TouchLocationState.Moved:
        case TouchLocationState.Pressed:
        case TouchLocationState.Released:
            if (touchPosition.X < 100 && touchPosition.Y < 100)
            {
                ship.Position.X -= 5;
            }

            break;

        default:
            break;
    }
}