在Windows Phone 8.1上传输GridView并不顺利

Question

I'm trying to move a GridView with the ManipulationDelta event, similar to dragging.

My ManipulationDelta event looks like this:

private void GridView_ManipulationDelta(object sender, ManipulationDeltaRoutedEventArgs e)
{
    var tt = (TranslateTransform)(sender as GridView).RenderTransform;
    tt.X += e.Delta.Translation.X;
    UpdateLayout();
}

The problem with this approach is that it's not smooth at all. Is there any better way to do this?

Answer 1

Remove the update layout call.

Changing the render transform is fast since it applies purely on the render thread and doesn't have to synchronize with the code thread or do a layout pass. UpdateLayout force everything to re-layout which is slow and unnecessary.