How to make multiple list views scroll together?

问题

I'm having a vertical list view which has in its item template another list view in horizontal position, now everything works fine, but I want to be able to scroll all of these sub list views if one of them scrolled.

Here is an illustration:

Now I want all the sub list views in all rows to scroll together. How can I do this?!

Maybe I can make an extending class for the list view with bindable property for scrolling ?! Something like this:

public class ScrollableListView : ListView {
    public static readonly BindableProperty ScrollProperty = BindableProperty.Create("ScrollPosition", typeof(double), typeof(ScrollableListView));
    public double ScrollPosition
    {
        get { return (double)GetValue(ScrollProperty ); }
        set
        {
            SetValue(ScrollProperty, value);
            ScrollToAsync(0, value);
        }
    }
}

And then in xaml bind all ScrollPosition property to a variable that changes whenever a list is scrolled, like this:

<DataTemplate>
    <RelativeLayout HeightRequest="{Binding Width}" Margin="{Binding Margin}">
        <Grid Rotation="90" AnchorX="0" AnchorY="0"
              RelativeLayout.XConstraint="{ConstraintExpression Type=RelativeToParent, Property=Width}"
              RelativeLayout.WidthConstraint="{ConstraintExpression Type=RelativeToParent, Property=Height}"
              RelativeLayout.HeightConstraint="{ConstraintExpression Type=RelativeToParent, Property=Width}">

            <Local:ScrollableListView ScrollPosition="{Binding SPos}" Scrolled="Generic_Scroll_Event"/>
        </Grid>
    </RelativeLayout>
</DataTemplate>

And in the Generic_Scroll_Event The SPos variable changes to the event sender's position.

This is just something that popped in my head ... Any help is appreciated anyway ^^.

回答1:

The above answer should work, but as there is no direct way of making a listview scroll to a position I had to make a workaround.

I used scrollviews instead and used it's template to work as a listview, then binded all of the scrollviews to the first one, in two way mode.

来源：https://stackoverflow.com/questions/64420241/how-to-make-multiple-list-views-scroll-together