Xamarin Forms - detect when user starts to scroll down in a scrollview

Question

I have a scrollview which, as soon as the user starts to scroll up, I run some code (OnSwipeUp()). I detect this using

textScroll.Scrolled += (sender, e) => { onScrolled(); };

private void onScrolled()
{
      if(textScroll.ScrollY > 0)
      {
          OnSwipeUp(null, null);
      }
}

I also need to detect when the user start scrolling down, so I was thinking of getting the max Y position of the scrollview then say something like

if(textScroll.ScrollY < maxY)

Am I able to do this?

Answer 1

Try this:

private double previousScrollPosition = 0;
void Handle_Scrolled(object sender, Xamarin.Forms.ScrolledEventArgs e) 
{

  if (previousScrollPosition < e.ScrollY) 
  {
    //scrolled down
    previousScrollPosition = e.ScrollY;
  } 
  else 
  {
      //scrolled up

    if (Convert.ToInt16(e.ScrollY) == 0)
    previousScrollPosition = 0;

  }
}