//初始化
public void Init()
{
if (itemsLoop.Count < 3)
{
return;
}
//滑动
gameObject.GetComponent <Image>().color = new Color(0, 0, 0, 1 / 255f);
sizeDelta = GetComponent <RectTransform>().sizeDelta;
GetComponent <RectTransform>().sizeDelta = sizeDelta;
EventTriggerListener.Get(gameObject).onDragStart = DragStart;
EventTriggerListener.Get(gameObject).onDrag = Dragging;
EventTriggerListener.Get(gameObject).onEndDrag = DragEnd;
//位置
for (int i = 0; i < cacheCount; i++)
{
Image ima = new GameObject("Item").AddComponent <Image>();
ima.color = Color.white;
ima.transform.SetParent(transform);
ima.transform.localScale = Vector3.one;
ima.GetComponent <RectTransform>().sizeDelta = sizeDelta;
ima.transform.localPosition = new Vector3(-sizeDelta.x + sizeDelta.x * i, 0, 0);
ItemLoop item = ima.gameObject.AddComponent <ItemLoop>();
item.ima = ima;
item.btn = item.gameObject.AddComponent <Button>();
item.btn.onClick.AddListener(delegate()
{
ClickImage(item.gameObject);
});
loopImages.Add(item);
}
loopImages[0].ima.sprite = itemsLoop[itemsLoop.Count - 1];
loopImages[1].ima.sprite = itemsLoop[0];
loopImages[2].ima.sprite = itemsLoop[1];
loopImages[0].imageIndex = itemsLoop.Count - 1;
loopImages[1].imageIndex = 0;
loopImages[2].imageIndex = 1;
}
//点击图片
void ClickImage(GameObject o)
{
ItemLoop item = o.GetComponent <ItemLoop>();
Debug.Log(item.imageIndex);
}
void Dragging(GameObject o)
{
Vector3 addPos = Input.mousePosition - curInputPos;
curInputPos = Input.mousePosition;
for (int i = 0; i < cacheCount; i++)
{
loopImages[i].transform.localPosition += new Vector3(addPos.x, 0, 0);
}
//最左边的越界就调到右边去
float maxPosX = sizeDelta.x * 1.5f;
bool needChangeLeft = loopImages[0].transform.localPosition.x < -maxPosX;
if (needChangeLeft)
{
//记录
curIndex++;
if (curIndex > 2)
{
curIndex = 0;
}
//调位置
loopImages[0].transform.localPosition = loopImages[2].transform.localPosition + new Vector3(sizeDelta.x, 0, 0);
//刷新数据
int index = loopImages[2].imageIndex + 1;
if (index > itemsLoop.Count - 1)
{
index = 0;
}
loopImages[0].imageIndex = index;
loopImages[0].ima.sprite = itemsLoop[index];
Debug.Log(index);
//调整List下标
ItemLoop item0 = loopImages[0];
ItemLoop item1 = loopImages[1];
ItemLoop item2 = loopImages[2];
loopImages[2] = item0;
loopImages[1] = item2;
loopImages[0] = item1;
Debug.Log("curIndex = " + curIndex);
}
//最右边的越界就跳到左边去
bool needChangeRight = loopImages[2].transform.localPosition.x > maxPosX;
if (needChangeRight)
{
curIndex--;
if (curIndex < 0)
{
curIndex = 2;
}
loopImages[2].transform.localPosition = loopImages[0].transform.localPosition - new Vector3(sizeDelta.x, 0, 0);
int index = loopImages[0].imageIndex - 1;
if (index < 0)
{
index = itemsLoop.Count - 1;
}
loopImages[2].imageIndex = index;
loopImages[2].ima.sprite = itemsLoop[index];
ItemLoop item0 = loopImages[0];
ItemLoop item1 = loopImages[1];
ItemLoop item2 = loopImages[2];
loopImages[0] = item2;
loopImages[1] = item0;
loopImages[2] = item1;
Debug.Log("curIndex = " + curIndex);
}
}
