/// <summary>
/// 重置Scroll，
/// </summary>
/// <param name="ids"></param>
/// <param name="pre"></param>
public void ResetScroll(List <int> ids, ExtraScrollItem pre, UnityEngine.Object manager = null)
{
Clear();
if (pre == null)
{
return;
}
if (viewRect.rect == Rect.zero)
{
Debug.LogError("viewRect为0：如果使用了Auto Hide And Expand ViewPort，请用Auto Hide加调整滑条位置代替");
return;
}
m_manager = manager;
m_itemPre = pre;
m_itemPre.rect.pivot = new Vector2(0.5f, 0.5f);
if (m_assignItemSize != Vector2.zero)
{
m_itemPre.rect.SetSizeWithCurrentAnchors(RectTransform.Axis.Horizontal, m_assignItemSize.x);
m_itemPre.rect.SetSizeWithCurrentAnchors(RectTransform.Axis.Vertical, m_assignItemSize.y);
}
m_itemIds = ids;//new List<int>(ids);
m_itemSize = m_itemPre.rect.rect.size;
m_viewportSize = viewRect.rect.size;
m_isValid = true;
resetContentSize();
createCacheItems();
UpdateView();
}
void createCacheItems()
{
if (m_cacheitems.Count != 0 || m_itemSize.y == 0 || m_itemSize.x == 0)
{
Debug.LogError("Scrollview:初始item失败，可能size为0，或存在未清除缓存");
return;
}
int needNum = -2;
if (m_layoutDirection == LayoutDirection.Horizontal)
{
needNum = Mathf.CeilToInt(m_viewportSize.x / (m_itemSize.x + m_layout.spacing));
}
else if (m_layoutDirection == LayoutDirection.Vertical)
{
needNum = Mathf.CeilToInt(m_viewportSize.y / (m_itemSize.y + m_layout.spacing));
}
needNum = Mathf.Max(m_cacheNum, needNum + 2);
for (int i = 0; i < needNum; i++)
{
ExtraScrollItem item = GameObject.Instantiate <ExtraScrollItem>(m_itemPre, content.transform, false);
item.SetManager(m_manager);
m_cacheitems.Add(item);
item.gameObject.SetActive(false);
}
}
void showItems()
{
for (int i = 0; i < m_curContentRange.count; ++i)
{
int idx = m_curContentRange.minIndex + i;
ExtraScrollItem it = m_cacheitems[i];
it.Reset(m_itemIds[idx]);
it.rect.localPosition = getPosAtIndex(idx);
it.gameObject.SetActive(true);
}
for (int i = m_curContentRange.count; i < m_cacheitems.Count; ++i)
{
ExtraScrollItem it = m_cacheitems[i];
it.gameObject.SetActive(false);
}
}
/// <summary>
/// 清空所以数据和view
/// </summary>
public void Clear()
{
m_itemPre = null;
m_itemSize = Vector2.zero;
m_curContentRange = IndexRange.NullRange;
m_itemIds.Clear();
foreach (ExtraScrollItem item in m_cacheitems)
{
GameObject.Destroy(item.gameObject);
}
m_cacheitems.Clear();
content.transform.localPosition = Vector2.zero;
m_manager = null;
m_isValid = false;
}
