unity NGUI Grid

UIGrid GRID = proficiencyItemGrid.GetComponent<UIGrid> ();
GRID.repositionNow = true;　　// 刷新

List<GameObject> canUseList = GridUtil.GetCanUseItemList(currencyGrid.gameObject);
StoreCurrencyItem item;

if(storeshelflist.Count!=0)
{
　　for (int i = 0; i < storeshelflist.Count; i++) {
　　　　item = GridUtil.GetNewItemObj<StoreCurrencyItem>(canUseList, currencyGrid.gameObject, storecurrencyItemPfb);

　　}

}