private bool mIsLoadOver = false; //是否加载完成
void Awake()
{
mTran = transform;
mPanel = GetComponent <UIPanel>();
if (mPanel == null)
{
SQDebug.Log("panel is null");
return;
}
mScrollView = GetComponent <UIScrollView>();
if (mScrollView == null)
{
SQDebug.Log("scrollview is null");
return;
}
//创建显示个数的item
for (int i = 0; i < ShowCount; i++)
{
GameObject obj = new GameObject((i + 1).ToString());
obj.transform.parent = mTran;
obj.transform.localPosition = Vector3.zero;
obj.transform.localScale = Vector3.one;
obj.transform.localRotation = Quaternion.Euler(Vector3.zero);
ChatScrollItem item = obj.AddComponent <ChatScrollItem>();
item.indexInScroll = i;
mItemList.Add(item);
}
mIsHorizontal = mScrollView.movement == UIScrollView.Movement.Horizontal ? true : false;
mPanel.onClipMove = OnClipMove;
mInitPanelPos = mTran.localPosition;
mInitPanelClip = mPanel.clipOffset;
mPanelHeight = mPanel.height;
}
/// <summary>
/// 更具显示的数量，生成Item
/// </summary>
public void InitInstantiateItems()
{
//创建显示个数的item
for (int i = 0; i < ShowCount; i++)
{
GameObject obj = new GameObject((i + 1).ToString());
obj.transform.parent = mTran;
obj.transform.localPosition = Vector3.zero;
obj.transform.localScale = Vector3.one;
obj.transform.localRotation = Quaternion.Euler(Vector3.zero);
ChatScrollItem item = obj.AddComponent <ChatScrollItem>();
item.indexInScroll = i;
mItemList.Add(item);
}
}
/// <summary>
/// 设置初始化item位置
/// </summary>
/// <param name="index">item的下标</param>
private void SetInitItemPos(int index)
{
ChatScrollItem obj = mItemList[index];
ChatScrollItem last = index <= 0 ? null : mItemList[index - 1];
if (last == null)
{
obj.transform.localPosition = Vector3.zero;
}
else
{
Vector3 pos = last.transform.localPosition; //前一个item的位置
pos.y = pos.y - last.contentHeight - SpaceY; //前一个item位置减去占用的高度和间隔就是当前item的初始位置
obj.transform.localPosition = pos;
}
}
/// <summary>
/// 是否最后一个item在panel的显示范围内
/// </summary>
/// <returns></returns>
private bool IsTheLastItemOnShow(int allcount)
{
if (allcount == 0)
{
return(true);
}
if (mMaxIndex != allcount - 1)//最大index不是最后一个，肯定不在范围内
{
return(false);
}
int index = mItemIndexDic[mMaxIndex]; //最后一个item在list中对应index
ChatScrollItem item = mItemList[index];
float y = mTran.localPosition.y + item.contentHeight; //如果当期panel位置加上item高度
if (y > mNextDownPos) //大于最大滑动到底端的位置，说明item在panel显示范围内
{
return(true);
}
return(false);
}
/// <summary>
/// 从最后添加一个item
/// </summary>
private void AddOneItemByLast()
{
bool b = IsTheLastItemOnShow(mAllCount); //最后一个item是否在panel显示范围内
if (!b) //如果不在直接总数加1
{
mAllCount += 1; //总数量+1
}
else//如果在范围内将新的item添加到最后
{
mScrollView.DisableSpring();
//最上边的item移动到最下边
//最新的最底面的item
int index = 0; //数据位置对应的gameobject位置
if (mAllCount < ShowCount) //总数<可以展示的最大数量
{
if (mAllCount != 0)
{
index = mMaxIndex + 1;
}
}
else
{
index = mItemIndexDic[mMinIndex];
}
ChatScrollItem item = mItemList[index];
item.gameObject.SetActive(true);
if (mAllCount >= ShowCount)//总数>=可以展示的最大数量
{
float itemHeight = item.contentHeight;
mMaxIndex++;
//新的最底端item数据对应的gameobject位置
int topIndex = mItemIndexDic[mMinIndex];
mItemIndexDic[mMaxIndex] = topIndex;
//下次滑动到顶端的位置
//SQDebug.Log("mNextUpPos:" + mNextUpPos);
mNextUpPos += (itemHeight + SpaceY);
//新的最上边的item index
mItemIndexDic.Remove(mMinIndex);//删除之前最顶端的记录
mMinIndex++;
DispatchEvent(eFuiScrollViewEvent.UpdateItem, mMaxIndex, item.transform.GetChild(0).gameObject);
SQDebug.Log("刷新");
}
else
{
//新的最底端item数据对应的gameobject位置
int topIndex = mItemIndexDic[mMaxIndex];
if (mAllCount != 0)
{
mMaxIndex++;
mItemIndexDic[mMaxIndex] = topIndex + 1;
}
DispatchEvent(eFuiScrollViewEvent.InitItem, mMaxIndex, item.gameObject);
SQDebug.Log("创建");
}
//重新设置最底下item的位置和大小
item.contentHeight = NGUIMath.CalculateRelativeWidgetBounds(item.transform).size.y;
if (mAllCount != 0)//总数为0
{
//重新设置最底下item的位置和大小
ChatScrollItem lastMax = mItemList[mItemIndexDic[mMaxIndex - 1]];//之前最大的item
Vector3 vec = lastMax.transform.localPosition;
vec.y -= (lastMax.contentHeight + SpaceY);
item.transform.localPosition = vec; //最终位置
//下次滑动到底端的位置
float last = mNextDownPos;
mNextDownPos += (item.contentHeight + SpaceY);
if (vec.y - mInitPanelPos.y < -mPanelHeight)//如果底端位置超过了panel的高度才重新计算裁剪
{
//重新设置panel的位置和裁剪
vec = mTran.localPosition;
float delta = mNextDownPos - vec.y;
vec.y = mNextDownPos;
mTran.localPosition = vec; //位置
//裁剪
Vector2 clip = mPanel.clipOffset;
clip.y -= delta;
mPanel.clipOffset = clip;
}
}
else
{
float last = mNextDownPos;
mNextDownPos += (item.contentHeight + SpaceY);
}
//总数+1
mAllCount += 1;
//SQDebug.Log("mMinIndex：" + mMinIndex + " mMaxIndex: " + mMaxIndex + " contentHeight:" + item.contentHeight + "mNextUpPos:" + mNextUpPos + item.contentHeight + "mNextDownPos:" + mNextDownPos + " last:" + (mNextUpPos - last + 50));
}
}
private void MoveOver(eMoveType movetype)
{
int index = 0;
Transform trans;
ChatScrollItem item = null;
float itemHeight = 0; //item高度
if (movetype == eMoveType.LeftAndUp) //向左或向上滑动
{
if (mTran.localPosition.y <= mNextDownPos)
{
return;
}
if (mItemIndexDic.TryGetValue(mMaxIndex, out index))
{
trans = mItemList[index].transform;
}
else
{
SQDebug.LogError("maxIndex is null");
return;
}
//最上边的item移动到最下边
//最新的最底面的item
index = mItemIndexDic[mMinIndex];//数据位置对应的gameobject位置
item = mItemList[index];
itemHeight = item.contentHeight;
mMaxIndex++;
//新的最底端item数据对应的gameobject位置
int topIndex = mItemIndexDic[mMinIndex];
mItemIndexDic[mMaxIndex] = topIndex;
//下次滑动到顶端的位置
//SQDebug.Log("mNextUpPos:" + mNextUpPos);
mNextUpPos += (itemHeight + SpaceY);
//新的最上边的item index
mItemIndexDic.Remove(mMinIndex);//删除之前最顶端的记录
mMinIndex++;
item.gameObject.SetActive(true);
DispatchEvent(eFuiScrollViewEvent.UpdateItem, mMaxIndex, item.transform.GetChild(0).gameObject);
//重新设置最底下item的位置和大小
item.contentHeight = NGUIMath.CalculateRelativeWidgetBounds(item.transform).size.y;
ChatScrollItem lastMax = mItemList[mItemIndexDic[mMaxIndex - 1]];//之前最大的item
Vector3 vec = lastMax.transform.localPosition;
vec.y -= (lastMax.contentHeight + SpaceY);
item.transform.localPosition = vec;//最终位置
//下次滑动到底端的位置
float last = mNextDownPos;
mNextDownPos += (item.contentHeight + SpaceY);
//SQDebug.Log("mMinIndex：" + mMinIndex + " mMaxIndex: " + mMaxIndex + " contentHeight:" + item.contentHeight + "mNextUpPos:" + mNextUpPos + "mNextDownPos:" + mNextDownPos + item.contentHeight + " last:" + (mNextDownPos - last - 50));
}
else//向右或向下滑动
{
if (mTran.localPosition.y >= mNextUpPos)
{
return;
}
//最下边的item移动到最上边
//最新的最顶端的item
index = mItemIndexDic[mMaxIndex];//数据位置对应的gameobject位置
item = mItemList[index];
itemHeight = item.contentHeight;
mMinIndex--;
//新的最顶端item数据对应的gameobject位置
int topIndex = mItemIndexDic[mMaxIndex];
mItemIndexDic[mMinIndex] = topIndex;
//下次滑动到顶端的位置
mNextDownPos -= (itemHeight + SpaceY);
//新的最底端的item index
mItemIndexDic.Remove(mMaxIndex);//删除之前最底端的记录
mMaxIndex--;
item.gameObject.SetActive(true);
DispatchEvent(eFuiScrollViewEvent.UpdateItem, mMinIndex, item.transform.GetChild(0).gameObject);
//重新设置最底下item的位置和大小
item.contentHeight = NGUIMath.CalculateRelativeWidgetBounds(item.transform).size.y;
ChatScrollItem lastMin = mItemList[mItemIndexDic[mMinIndex + 1]];//之前最小的item
Vector3 vec = lastMin.transform.localPosition;
vec.y += (item.contentHeight + SpaceY);
item.transform.localPosition = vec;//最终位置
//下次滑动到顶端的位置
float last = mNextUpPos;
mNextUpPos -= (item.contentHeight + SpaceY);
//SQDebug.Log("mMinIndex：" + mMinIndex + " mMaxIndex: " + mMaxIndex + " contentHeight:" + item.contentHeight + "mNextUpPos:" + mNextUpPos + item.contentHeight + "mNextDownPos:" + mNextDownPos + " last:"+(mNextUpPos - last + 50));
}
}