/**
* @des:添加当前数据索引数据
*/
public void AddItem(int dataIndex, float length)
{
AddWarpContentDataItem(dataIndex, length);
if (dataIndex < 0)
{
return;
}
//检测是否需添加gameObject
bool isNeedAdd = false;
for (int i = listItem.Count - 1; i >= 0; i--)
{
ScrollRectExItem item = listItem [i];
if (item.Index >= (dataCount - 1))
{
isNeedAdd = true;
break;
}
}
if (listItem.Count == 0)
{
isNeedAdd = true;
}
SetDataCount(dataCount + 1);
if (isNeedAdd)
{
for (int i = 0; i < listItem.Count; i++)
{
ScrollRectExItem item = listItem [i];
int oldIndex = item.Index;
if (oldIndex >= dataIndex)
{
item.Index = oldIndex + 1;
}
item = null;
}
SetUpdateRectItem(GetCurScrollPerLineIndex());
}
else
{
//重新刷新数据
for (int i = 0; i < listItem.Count; i++)
{
ScrollRectExItem item = listItem [i];
int oldIndex = item.Index;
if (oldIndex >= dataIndex)
{
item.Index = oldIndex;
}
item = null;
}
}
}
/**
* @des:删除当前数据索引下数据
*/
public void DelItem(int dataIndex)
{
if (dataIndex < 0 || dataIndex >= dataCount)
{
return;
}
//删除item逻辑三种情况
//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--)
{
ScrollRectExItem 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());
}
/**
* @des:设置更新区域内item
* 功能:
* 1.隐藏区域之外对象
* 2.更新区域内数据
*/
private void SetUpdateRectItem(int scrollPerLineIndex)
{
if (scrollPerLineIndex < 0)
{
return;
}
curScrollPerLineIndex = scrollPerLineIndex;
int startDataIndex = curScrollPerLineIndex * maxPerLine;
int endDataIndex = (curScrollPerLineIndex + viewCount) * maxPerLine;
//移除
for (int i = listItem.Count - 1; i >= 0; i--)
{
ScrollRectExItem item = listItem[i];
int index = item.Index;
if (index < startDataIndex || index >= endDataIndex)
{
item.Index = -1;
listItem.Remove(item);
unUseItem.Enqueue(item);
}
}
//显示
for (int dataIndex = startDataIndex; dataIndex < endDataIndex; dataIndex++)
{
if (dataIndex >= dataCount)
{
continue;
}
if (IsExistDataByDataIndex(dataIndex))
{
continue;
}
CreateItem(dataIndex);
}
}
