/// <summary>
/// ScrollView变量初期化
/// </summary>
public void Clear()
{
isActived = false;
_scrollView.DisableSpring();
_scrollView.restrictWithinPanel = false;
if (_scrollOrientation == ScrollOrientation.VERTICAL)
{
_scrollView.MoveRelative(new Vector3(0, _scrollView.panel.clipOffset.y, 0));
}
if (_scrollOrientation == ScrollOrientation.HORIZONTAL)
{
_scrollView.MoveRelative(new Vector3(_scrollView.panel.clipOffset.x, 0, 0));
}
for (int i = _itemsList.Count - 1; i >= 0; i--)
{
(this as ObjectPool <GameObject>).Store(_itemsList[i].gameObject);
}
_itemsList = null;
_lastPosition = 0;
_itemsToRecycleBefore = 0;
onListMoved = null;
_scrollView.restrictWithinPanel = true;
}
/// <summary>
/// 初始化方法
/// 步骤：
/// 1.AddComponent<此组件>()
/// 2.设置EnableMultiLine属性值
/// 例如：多行多列
/// EnableMultiLine = true
/// _spacing_row = 行间距
/// _spacing_line = 列间距
/// 3.预制继承自UIScrollViewItemBase的子类
/// 4.调用Create(列表项总数，预制体)方法
/// </summary>
/// <param name="items">实例化项目个数</param>
/// <param name="listItemPrefab">实例化的模板</param>
public void Create(int items, UIScrollViewItemBase listItemPrefab)
{
_itemsTotal = items;
p_prefab = listItemPrefab.gameObject;
switch (_scrollOrientation)
{
case ScrollOrientation.HORIZONTAL:
if (!EnableMultiLine)
{
_itemSize = listItemPrefab.Size.x;
_itemsVisible = Mathf.CeilToInt(GetViewportSize() / (_itemSize + _spacing));
}
else
{
_itemSize_ml = new Vector2(listItemPrefab.Size.x, listItemPrefab.Size.y);
_itemsVisible_row = Mathf.CeilToInt(_viewport.width / (_itemSize_ml.x + _spacing_line));
_itemsVisible_line = Mathf.FloorToInt(_viewport.height / (_itemSize_ml.y + _spacing_row));
}
break;
case ScrollOrientation.VERTICAL:
if (!EnableMultiLine)
{
_itemSize = listItemPrefab.Size.y;
_itemsVisible = Mathf.CeilToInt(GetViewportSize() / (_itemSize + _spacing));
}
else
{
_itemSize_ml = new Vector2(listItemPrefab.Size.x, listItemPrefab.Size.y);
//垂直方向时，row可显示item数量使用向下舍位取整
_itemsVisible_row = Mathf.FloorToInt(_viewport.width / (_itemSize_ml.x + _spacing_line));
_itemsVisible_line = Mathf.CeilToInt(_viewport.height / (_itemSize_ml.y + _spacing_row));
//print("_itemsVisible_row = " + _itemsVisible_row);
//print("_itemsVisible_line = " + _itemsVisible_line);
}
break;
}//end Switch
//Debug.LogWarning("GetViewportSize() "+ GetViewportSize()+" "+ _itemSize
// +" Mathf.CeilToInt()"+ Mathf.CeilToInt(GetViewportSize() / _itemSize)
// );
int itemsToInstantiate = EnableMultiLine ? _itemsVisible_row * _itemsVisible_line : _itemsVisible;
if (itemsToInstantiate > items || (items >= itemsToInstantiate && items <= 2 * itemsToInstantiate))
{
itemsToInstantiate = items;
//CHANGED: 2017-7-06 添加自动补齐行/列开关
if (WhetherAutomaticallyFill)
{
if (itemsToInstantiate % _itemsVisible_row != 0)//每行项目数不满的时候，补齐行
{
itemsToInstantiate += Mathf.CeilToInt((float)itemsToInstantiate / (float)_itemsVisible_row) * _itemsVisible_row - itemsToInstantiate;
}
}
//print("total:"+ items);
//print("gen:"+ itemsToInstantiate);
//print("itemsToInstantiate / _itemsVisible_row = " + (float)(itemsToInstantiate / _itemsVisible_row));
//print("itemsToInstantiate = " + itemsToInstantiate);
//print("_itemsVisible_row = " + _itemsVisible_row);
//print("Mathf.CeilToInt(itemsToInstantiate / _itemsVisible_row) = " + Mathf.CeilToInt(itemsToInstantiate / _itemsVisible_row));
}
else
{
itemsToInstantiate *= 2;
}
_itemsList = new List <UIScrollViewItemBase>();
for (int i = 0; i < itemsToInstantiate; i++)
{
UIScrollViewItemBase item = EnableMultiLine ?
CreateNewItem(i, _itemSize_ml) : CreateNewItem(i, _itemSize);
item.onSelected = HandleOnSelectedHandler;
item.Index = i;
_itemsList.Add(item);
ItemLoaded(item);//列表项加载完成Callback
}
_firstItemIndex = 0;
_lastItemIndex = _itemsList.Count - 1;
_itemsToRecycleAfter = EnableMultiLine ?
_itemsList.Count / _itemsVisible_row - _itemsVisible_line :
_itemsList.Count - _itemsVisible;
//Debug.LogWarning("_itemSize = " + _itemSize);
//Debug.LogWarning("_itemsVisible = " + _itemsVisible);
//Debug.LogWarning("_itemsVisibles = " + _itemsVisible_row + " " + _itemsVisible_line);
//Debug.LogWarning("itemsToInstantiate = " + itemsToInstantiate);
//Debug.LogWarning("_itemsTotal = " + _itemsTotal);
//Debug.LogWarning("_lastItemIndex = " + _lastItemIndex);
//注册事件
onListMoved += Recycle;//在列表向某方向移动了一整行后触发
//List<EventDelegate> events_OnChange = new List<EventDelegate>();
//events_OnChange.Add(new EventDelegate(HandleOnScrollBarValueChangedHandler));
//_scrollBar.onChange = events_OnChange;
isActived = true;
}//end Create()
