protected override void OnCollectionAdd(object sender, NotifyCollectionChangedEventArgs args)
{
var index = args.NewStartingIndex;
int count = 1;
if (args.NewItems != null)
{
count = args.NewItems.Count;
}
m_LoopVerticalScrollRect.InsertRange(index, count);
// Debug.LogFormat ("OnCollectionAdd(index={0},count={1},datalen={2},items.count={3}) ", index, count,m_LoopVerticalScrollRect.dataLength,items.Count);
}