/// <summary>
/// 跳转到指定序号
/// </summary>
/// <param name="index_"></param>
/// <param name="posType_"></param>
/// <returns></returns>
public bool JumpToIndex(int index_, JumpPosType posType_)
{
//if (!m_scrollView.NeedScroll())
// //不需要滚动
// return false;
if (index_ < 0 || index_ > m_dataList.Count - 1)
{
//超出数据范围
return(false);
}
Vector2 contentPos = m_contentTrans.anchoredPosition;
Vector2 maskSize = m_scrollView.maskTrans.sizeDelta;
LayoutItem layoutItem = GetLayoutItem(index_);
Rect rect = layoutItem.rect;
KScrollView.ScrollDir dir = direction;
if (dir == KScrollView.ScrollDir.vertical)
{
float yMin = 0;
float yMax = m_contentSize.y - maskSize.y;
float y;
switch (posType_)
{
case JumpPosType.TOP:
//列表项位于顶部
y = -rect.yMax; //y是负数
break;
case JumpPosType.CENTER:
//列表项位于中间
y = -rect.center.y - maskSize.y * 0.5f;
break;
default:
//列表项位于底部
y = -rect.yMin - maskSize.y;
break;
}
contentPos.y = Mathf.Clamp(y, yMin, yMax);
}
else
{
float xMin = maskSize.x - m_contentSize.x;
float xMax = 0;
float x;
switch (posType_)
{
case JumpPosType.TOP:
//列表项位于顶部
x = -rect.xMin;
break;
case JumpPosType.CENTER:
//列表项位于中间
x = -rect.center.x + maskSize.x * 0.5f;
break;
default:
//列表项位于底部
x = -rect.xMax + maskSize.x;
break;
}
contentPos.x = Mathf.Clamp(x, xMin, xMax);
}
m_scrollView.StopMovement(); //停止滑动
m_contentTrans.anchoredPosition = contentPos;
return(true);
}
public void Refresh(Vector2 scrollPosition, KScrollView view)
{
bool prevVisible = false;
bool nextVisible = false;
//Log.Debug("scrollPosition " + scrollPosition, this);
bool needScroll = view.NeedScroll();
KScrollView.ScrollDir direction = view.direction;
if (needScroll)
{
if (direction == KScrollView.ScrollDir.vertical)
{
if (scrollPosition.y > 0)
{
nextVisible = true;
}
if (scrollPosition.y < 1)
{
prevVisible = true;
}
}
else
{
if (scrollPosition.x > 0)
{
prevVisible = true;
}
if (scrollPosition.x < 1)
{
nextVisible = true;
}
}
}
else
{
//内容比遮罩短时, 除非强行拽否则不显示箭头
//需要配合scrollrect的修改
if (direction == KScrollView.ScrollDir.vertical)
{
if (scrollPosition.y > 1) //强行往下拽, 显示下箭头
{
nextVisible = true;
}
if (scrollPosition.y < 0) //强行往上拽, 显示上箭头
{
prevVisible = true;
}
}
else
{
if (scrollPosition.x > 1)
{
prevVisible = true;
}
if (scrollPosition.x < 0)
{
nextVisible = true;
}
}
}
if (m_prevImage)
{
m_prevImage.Visible = prevVisible;
}
if (m_nextImage)
{
m_nextImage.Visible = nextVisible;
}
}