protected virtual UIListItem GetItem(int index)
{
if (index < _itemList.Count)
{
return(_itemList[index]);
}
else
{
RectTransform newItem = CreateItem();
newItem.gameObject.SetActive(true);
newItem.name = "Item " + index.ToString();
UIListItem item = newItem.GetComponent <UIListItem>();
_itemList.Add(item);
return(item);
}
}
public virtual void RepositionItems()
{
if (_startIndex > _data.Count - PooledItemCount)
{
return;
}
for (int i = _startIndex; i < _startIndex + PooledItemCount; ++i)
{
if (i < 0 || i >= _data.Count)
{
continue;
}
UIListItem item = GetItem(i - _startIndex); // 需要减去_startIndex，因为GetItem最大只能是PooledItemCount-1
item.CachedGameObject.name = "Item " + i.ToString();
item.CachedRectTransform.anchoredPosition = GetItemAnchorPostion(i);
item.UpdateItem(i, _data[i]);
}
}