/// <summary>
/// 取消异步加载资源
/// </summary>
/// <returns></returns>
public bool CancleLoad(ResourceObj res)
{
AsyncLoadResUnit unit = null;
//这俩个条件主要来判断该资源还没有进入到异步加载流程
//多个人请求同一份资源，要多个人都取消才能取消这个异步加载单位
//其中一个人取消异步加载，只是把应该给他的回调取消掉
if (m_LoadingAssetDic.TryGetValue(res.m_Crc, out unit) &&
m_loadingAssetList[(int)unit.m_Priority].Contains(unit))
{
for (int i = unit.m_CallBackList.Count - 1; i >= 0; i--)
{
//取消对应的回调列表
AsynCallBack tempCallBack = unit.m_CallBackList[i];
if (tempCallBack != null && res == tempCallBack.m_ResObj)
{
tempCallBack.Reset();
m_AsynCallBackPool.Recycle(tempCallBack);
unit.m_CallBackList.Remove(tempCallBack);
}
}
//异步加载单位的回调列表为0，表示所有人都取消了这个资源加载，回收他
if (unit.m_CallBackList.Count <= 0)
{
unit.Reset();
m_loadingAssetList[(int)unit.m_Priority].Remove(unit);
m_AsyncLoadResParamPool.Recycle(unit);
m_LoadingAssetDic.Remove(res.m_Crc);
return(true);
}
}
return(false);
}
/// <summary>
/// 异步资源加载，外部直接调用，（仅仅加载不需要实例化的资源，例如Texture和音频之类的）
/// </summary>
public void AsyncLoadResource(string path, OnAsyncFinish dealFinish, LoadResPriority priority, bool isSprite = false, uint crc = 0, params object[] paramList)
{
if (crc == 0)
{
crc = Crc32.GetCrc32(path);
}
AssetBundleInfo abInfo = GetCacheAssetBundleInfo(crc);
if (abInfo != null)
{
dealFinish?.Invoke(path, abInfo.m_Obj, paramList);
return;
}
//判断是否在加载中
AsyncLoadResUnit unit = null;
//没有找到这个异步加载单位，或者这个异步加载单位是空
if (!m_LoadingAssetDic.TryGetValue(crc, out unit) || unit == null)
{
unit = m_AsyncLoadResParamPool.Spawn(true);
unit.m_Crc = crc;
unit.m_Path = path;
unit.m_Sprite = isSprite;
unit.m_Priority = priority;
m_LoadingAssetDic.Add(crc, unit); //添加到正在异步加载的资源dic中
m_loadingAssetList[(int)priority].Add(unit); //按照加载优先级，添加到对应的正在异步加载的资源列表中
}
//往回调列表里面添加回调
AsynCallBack callBack = m_AsynCallBackPool.Spawn(true);
callBack.m_DealFinish = dealFinish;
callBack.m_Params = paramList;
//往这个异步加载单位的回调列表中添加一个回调
//可能多个地方加载同一份资源，这样做只加载一次资源，
//加载完了后，根据回调列表一次返回这份资源
unit.m_CallBackList.Add(callBack);
}
/// <summary>
/// 异步资源加载，针对ObjectManager的，（需要实例化对象的异步加载）
/// </summary>
public void AsyncLoadResource(string path, ResourceObj resObj, OnAsyncResObjFinish dealFinish, LoadResPriority priority, uint crc = 0, params object[] paramList)
{
AssetBundleInfo abInfo = GetCacheAssetBundleInfo(resObj.m_Crc);
if (abInfo != null)
{
resObj.m_AssetBundleInfo = abInfo;
if (dealFinish != null)
{
dealFinish(path, resObj, paramList);
}
return;
}
//判断是否在加载中
AsyncLoadResUnit unit = null;
//没有找到这个异步加载单位，或者这个异步加载单位是空
if (!m_LoadingAssetDic.TryGetValue(resObj.m_Crc, out unit) || unit == null)
{
unit = m_AsyncLoadResParamPool.Spawn(true);
unit.m_Crc = resObj.m_Crc;
unit.m_Path = path;
unit.m_Priority = priority;
m_LoadingAssetDic.Add(resObj.m_Crc, unit); //添加到正在异步加载的资源dic中
m_loadingAssetList[(int)priority].Add(unit); //按照加载优先级，添加到对应的正在异步加载的资源列表中
}
//往回调列表里面添加回调
AsynCallBack callBack = m_AsynCallBackPool.Spawn(true);
callBack.m_Params = paramList;
callBack.m_DealResObjFinish = dealFinish;
callBack.m_ResObj = resObj;
//往这个异步加载单位的回调列表中添加一个回调
//可能多个地方加载同一份资源，这样做只加载一次资源，
//加载完了后，根据回调列表依次返回这份资源
unit.m_CallBackList.Add(callBack);
}
/// <summary>
/// 异步加载
/// </summary>
/// <returns></returns>
IEnumerator AsyncLoadCor()
{
List <AsynCallBack> callBackList = null;
while (true)
{
bool haveYield = false; //是否已经等了一帧了
//上次yield的时间
long lastYiledTime = System.DateTime.Now.Ticks;
//遍历优先级列表，从0开始，0表示最高
for (int i = 0; i < (int)LoadResPriority.RES_NUM; i++)
{
//每次循环，只要高级列表有东西，就一直加载高级列表资源，直到加载完毕
if (m_loadingAssetList[(int)LoadResPriority.RES_HIGHT].Count > 0)
{
i = (int)LoadResPriority.RES_HIGHT;
}
else if (m_loadingAssetList[(int)LoadResPriority.RES_MIDDLE].Count > 0)
{
i = (int)LoadResPriority.RES_MIDDLE;
}
List <AsyncLoadResUnit> loadingList = m_loadingAssetList[i];
if (loadingList.Count <= 0)
{
continue;
}
AsyncLoadResUnit loadintItem = loadingList[0];
loadingList.RemoveAt(0);
callBackList = loadintItem.m_CallBackList;
Object obj = null;
AssetBundleInfo abInfo = null;
#if UNITY_EDITOR
if (!m_LoadFromAssetBundle)
{
if (loadintItem.m_Sprite) //判断是否是Sprite,因为Unity Object不能转换成Sprite
{
obj = LoadAssetByEditor <Sprite>(loadintItem.m_Path);
}
else
{
obj = LoadAssetByEditor <Object>(loadintItem.m_Path);
}
//编辑器下模拟异步加载，等0.1f
yield return(new WaitForSeconds(0.1f));
abInfo = AssetBundleManager.Instance.FindAssetBundleInfo(loadintItem.m_Crc);
if (abInfo == null)
{
abInfo = new AssetBundleInfo();
abInfo.m_Crc = loadintItem.m_Crc;
}
}
#endif
if (obj == null)
{
abInfo = AssetBundleManager.Instance.LoadAssetBundleInfoAsync(loadintItem.m_Crc);
yield return(abInfo);
if (abInfo.isDone)
{
if (abInfo != null && abInfo.m_AssetBundle != null)
{
AssetBundleRequest abRequest = null;
if (loadintItem.m_Sprite) //判断是否是Sprite,因为Unity Object不能转换成Sprite
{
abRequest = abInfo.m_AssetBundle.LoadAssetAsync <Sprite>(abInfo.m_AssetName);
}
else
{
abRequest = abInfo.m_AssetBundle.LoadAssetAsync(abInfo.m_AssetName);
}
yield return(abRequest);
if (abRequest.isDone)
{
obj = abRequest.asset;
}
lastYiledTime = System.DateTime.Now.Ticks;
}
}
}
CacheAssetBundleInfo(loadintItem.m_Path, ref abInfo, loadintItem.m_Crc, obj, callBackList.Count);
//处理回调
for (int j = 0; j < callBackList.Count; j++)
{
AsynCallBack callBack = callBackList[j];
//实例化对象的回调
if (callBack != null && callBack.m_DealResObjFinish != null && callBack.m_ResObj != null)
{
ResourceObj tempResObj = callBack.m_ResObj;
tempResObj.m_AssetBundleInfo = abInfo;
callBack.m_DealResObjFinish(loadintItem.m_Path, tempResObj, callBack.m_Params);
callBack.m_DealResObjFinish = null;
tempResObj = null;
}
//非实例化对象的回调
if (callBack != null && callBack.m_DealFinish != null)
{
callBack.m_DealFinish(loadintItem.m_Path, obj, callBack.m_Params);
callBack.m_DealFinish = null;
}
callBack.Reset(); //还原回调，并且回收
m_AsynCallBackPool.Recycle(callBack);
}
obj = null;
callBackList.Clear();
m_LoadingAssetDic.Remove(loadintItem.m_Crc);
loadintItem.Reset();
m_AsyncLoadResParamPool.Recycle(loadintItem);
//加载一个资源时间过长，等一帧
if (System.DateTime.Now.Ticks - lastYiledTime > MAXLOADRESTIME)
{
yield return(null);
lastYiledTime = System.DateTime.Now.Ticks;
haveYield = true;
}
}
//内存循环加载很快，没有等一帧，但是加载整个优先级列表时间过长，等一帧
if (!haveYield || System.DateTime.Now.Ticks - lastYiledTime > MAXLOADRESTIME)
{
lastYiledTime = System.DateTime.Now.Ticks;
yield return(null);
}
}
}
