protected abstract void OnUserPointerUp(PointerEventData eventData); //用户手指或鼠标松开事件响应
/// <summary>
/// 检测到手指或鼠标按下时开启协程，判断用户本次操作类型
/// </summary>
/// <param name="data">Data.</param>
public virtual void OnPointerDown(PointerEventData data)
{
UserOperationCallBack longPressCallBack = OnUserLongPress;
Rect detectSourceRect = (transform as RectTransform).rect;
checkOperationTypeCoroutine = CheckUserOperationType(data, longPressCallBack);
StartCoroutine(checkOperationTypeCoroutine);
}
/// <summary>
/// 判断用户本次点击事件操作类型的协程
/// </summary>
/// <returns>The user operation type.</returns>
/// <param name="data">点击起始时刻的点击信息数据</param>
/// <param name="longPressCallBack">长按事件回调.</param>
private IEnumerator CheckUserOperationType(PointerEventData data, UserOperationCallBack longPressCallBack)
{
float pressTime = Time.realtimeSinceStartup;
mOperationType = UserOperationType.ShortClick;
Vector3 pointerWorldPos;
Vector3[] worldCorners = new Vector3[4];
(transform as RectTransform).GetWorldCorners(worldCorners);
bool pointerInsideDetectSource = true;
while (Time.realtimeSinceStartup - pressTime < minPressTimeToDrag)
{
RectTransformUtility.ScreenPointToWorldPointInRectangle(transform as RectTransform, Input.mousePosition, data.pressEventCamera, out pointerWorldPos);
pointerInsideDetectSource = CheckPointerInsideDetectSource(worldCorners, pointerWorldPos);
if (!pointerInsideDetectSource)
{
mOperationType = UserOperationType.Cancel;
break;
}
yield return(null);
}
if (pointerInsideDetectSource)
{
mOperationType = UserOperationType.LongPress;
OnUserLongPress(data);
}
checkOperationTypeCoroutine = null;
}
