/// <summary>
/// 根据已经存在的项创建其他的项 如果项太多会删除数据
/// </summary>
/// <param name="dex"></param>
/// <returns></returns>
protected virtual RectTransform CrateGameObject(int dex)
{
RectTransform target = null;
bool isCreateItem = false; //标示是否是创建的项or 复用的项
if (dex < ContentRectrans.childCount)
{
target = ContentRectrans.GetChildEX(dex);
}
else
{
target = GameObject.Instantiate(mItemPrefab, ContentRectrans).transform as RectTransform;
isCreateItem = true;
}
LoopCircleItem circleItem = target.GetAddComponent <LoopCircleItem>();
circleItem.InitialedView(dex);
AllLoopCircleItems[target] = circleItem;
if (isCreateItem && OnItemCreateAct != null)
{
OnItemCreateAct(target, circleItem);
}
return(target);
}
/// <summary>
/// 将最后不可见的项移动到第一个
/// </summary>
/// <param name="firstItem"></param>
protected virtual void ScrollUpDirection(RectTransform lastItem, RectTransform firstItem)
{
lastItem.SetAsFirstSibling();
lastItem.anchoredPosition = new Vector2(firstItem.anchoredPosition.x, firstItem.anchoredPosition.y + ItemDistance);
LoopCircleItem lastloopCircle = AllLoopCircleItems[lastItem];
LoopCircleItem firstloopCircle = AllLoopCircleItems[firstItem];
lastloopCircle.InitialedView(firstloopCircle.DataIndex - 1);
if (OnItemShowAct != null)
{
OnItemShowAct.Invoke(lastItem, lastloopCircle);
}
}
/// <summary>
/// 将第一个不可见的项移动到末尾
/// </summary>
/// <param name="firstItem"></param>
protected virtual void ScrollRightDirection(RectTransform firstItem, RectTransform lastItem)
{
//if (firstItem == null)
// firstItem = ContentRectrans.GetChildEX(0);
firstItem.SetAsLastSibling();
firstItem.anchoredPosition = new Vector2(lastItem.anchoredPosition.x + ItemDistance, lastItem.anchoredPosition.y);
LoopCircleItem firstloopCircle = AllLoopCircleItems[firstItem];
LoopCircleItem lastloopCircle = AllLoopCircleItems[lastItem];
firstloopCircle.InitialedView(lastloopCircle.DataIndex + 1);
if (OnItemShowAct != null)
{
OnItemShowAct.Invoke(firstItem, firstloopCircle);
}
}
/// <summary>
///将最后一个不可见得项移动到开头
/// </summary>
/// <param name="operateItem"></param>
protected virtual void ScrollLeftDirection(RectTransform lastItem, RectTransform firstItem)
{
//if (lastItem == null)
// lastItem = ContentRectrans.GetChildEX(ContentRectrans.childCount - 1);
lastItem.SetAsFirstSibling();
lastItem.anchoredPosition = new Vector2(firstItem.anchoredPosition.x - ItemDistance, firstItem.anchoredPosition.y);
LoopCircleItem lastloopCircle = AllLoopCircleItems[lastItem];
LoopCircleItem firstloopCircle = AllLoopCircleItems[firstItem];
lastloopCircle.InitialedView(firstloopCircle.DataIndex - 1);
if (OnItemShowAct != null)
{
OnItemShowAct.Invoke(lastItem, lastloopCircle);
}
}