//RefreshItem
private void setUpdateRectItem(int scrollPerLineIndex)
{
if (scrollPerLineIndex < 0)
{
return;
}
int startDataIndex = 0;
int endDataIndex = 0;
curScrollPerLineIndex = scrollPerLineIndex;
if (alignment == Alignment.eHorizontal)
{
startDataIndex = curScrollPerLineIndex * CountOfRow;
endDataIndex = (curScrollPerLineIndex + ViewCount) * CountOfRow;
}
else
{
startDataIndex = curScrollPerLineIndex * CountOfCol;
endDataIndex = (curScrollPerLineIndex + ViewCount) * CountOfCol;
}
//move item when unused
for (int i = listItem.Count - 1; i >= 0; i--)
{
UILoopItem item = listItem[i];
int index = item.Index;
if (index < startDataIndex || index >= endDataIndex)
{
item.Index = 0;
listItem.Remove(item);
unUseItem.Enqueue(item);
}
else
{
item.UpdateItem(_datas, item.Index);
}
}
for (int dataIndex = startDataIndex; dataIndex < endDataIndex; dataIndex++)
{
if (dataIndex >= dataCount)
{
continue;
}
if (isExistDataByDataIndex(dataIndex))
{
continue;
}
createItem(dataIndex);
}
}
//add item
public void AddItem(int dataIndex)
{
if (dataIndex < 0 || dataIndex > dataCount)
{
return;
}
bool isNeedAdd = false;
for (int i = listItem.Count - 1; i >= 0; i--)
{
UILoopItem item = listItem[i];
if (item.Index >= (dataCount - 1))
{
isNeedAdd = true;
break;
}
}
setDataCount(dataCount + 1);
if (isNeedAdd)
{
for (int i = 0; i < listItem.Count; i++)
{
UILoopItem item = listItem[i];
int oldIndex = item.Index;
if (oldIndex >= dataIndex)
{
item.Index = oldIndex + 1;
item.UpdateItem(_datas, item.Index);
}
item = null;
}
setUpdateRectItem(getCurScrollPerLineIndex());
}
else
{
for (int i = 0; i < listItem.Count; i++)
{
UILoopItem item = listItem[i];
int oldIndex = item.Index;
if (oldIndex >= dataIndex)
{
item.Index = oldIndex;
item.UpdateItem(_datas, item.Index);
}
item = null;
}
}
}
public void DelItem(int dataIndex)
{
if (dataIndex < 0 || dataIndex >= dataCount)
{
return;
}
//1.只更新数据，不销毁gameObject,也不移除gameobject
//2.更新数据，且移除gameObject,不销毁gameObject
//3.更新数据，销毁gameObject
bool isNeedDestroyGameObject = (listItem.Count >= dataCount);
setDataCount(dataCount - 1);
for (int i = listItem.Count - 1; i >= 0; i--)
{
UILoopItem item = listItem[i];
int oldIndex = item.Index;
if (oldIndex == dataIndex)
{
listItem.Remove(item);
if (isNeedDestroyGameObject)
{
GameObject.Destroy(item.gameObject);
}
else
{
item.Index = -1;
unUseItem.Enqueue(item);
}
}
if (oldIndex > dataIndex)
{
item.Index = oldIndex - 1;
}
}
setUpdateRectItem(getCurScrollPerLineIndex());
}