public void Init(int _maxSlot)
{
itemGoArray = new SlotGoBase[_maxSlot];
for (int i = 0; i < itemGoArray.Length; i += 1)
{
SlotGoBase _itemGo = Instantiate(itemPrefab, itemBD.transform);
_itemGo.RenderItem(i, null, i.ToString());
_itemGo.enterAction += OnEnterItem;
_itemGo.exitAction += OnExitItem;
_itemGo.endDragAction += OnEndDrag;
itemGoArray[i] = _itemGo;
}
}
void OnEndDrag(SlotGoBase _itemGo)
{
itemInDraging = _itemGo;
if (itemDragTo == null)
{
itemInDraging.PutDefaultPosition();
return;
}
int _currentIndex = itemInDraging.index;
int _targetIndex = itemDragTo.index;
// 默认调换位置 方法一:
// itemInDraging.transform.localPosition = itemDragTo.defalutPos;
// itemDragTo.transform.localPosition = itemInDraging.defalutPos;
// 默认调换位置 方法二:
if (_currentIndex > _targetIndex)
{
itemInDraging.transform.SetSiblingIndex(itemDragTo.index + 1);
itemDragTo.transform.SetSiblingIndex(itemInDraging.index);
}
else
{
itemDragTo.transform.SetSiblingIndex(itemInDraging.index + 1);
itemInDraging.transform.SetSiblingIndex(itemDragTo.index);
}
itemInDraging.index = _targetIndex;
itemDragTo.index = _currentIndex;
DragItemTo?.Invoke(_currentIndex, _targetIndex);
// 调换位置 or 叠加物品 or 回到原位
}
void OnExitItem()
{
itemDragTo = null;
}
void OnEnterItem(SlotGoBase _itemGo)
{
itemDragTo = _itemGo;
}