public void ForceUnloadAssets(MemeryHold hold = MemeryHold.Once)
{
List <string> tempList = new List <string>();
Dictionary <string, AssetCache> .Enumerator e = m_AssetCaches.GetEnumerator();
while (e.MoveNext())
{
if (e.Current.Value.hold <= hold)
{
tempList.Add(e.Current.Key);
}
}
for (int i = 0; i < tempList.Count; ++i)
{
// 立即移除
RemoveCachedAsset(tempList[i]);
}
tempList.Clear();
tempList = null;
System.GC.Collect();
}
/// <summary>
/// 查找或创建 AssetCache
/// </summary>
/// <param name="key"></param>
/// <param name="assetBundle"></param>
/// <param name="assetName"></param>
/// <param name="type"></param>
/// <param name="hold"></param>
/// <param name="preload"></param>
/// <returns></returns>
private AssetCache GenAssetCache(string key, string assetBundle, string assetName, System.Type type, MemeryHold hold, bool preload = false)
{
if (m_AssetCaches.TryGetValue(key, out AssetCache cache))
{
Debug.Assert(assetBundle == cache.assetbundleName && assetName == cache.assetName && type == cache.type, "Cached Asset is not same.");
if (cache.hold < hold)
{
cache.hold = hold;
}
if (!preload)
{
cache.refCount++;
}
}
else
{
cache = new AssetCache
{
assetName = assetName,
assetbundleName = assetBundle,
type = type,
hold = hold,
refCount = preload ? 0 : 1,
};
m_AssetCaches.Add(key, cache);
}
#if UNITY_EDITOR
isDirty = true;
#endif
return(cache);
}
/// <summary>
/// Loads the asset async.
/// </summary>
/// <param name="assetBundle">Asset bundle.</param>
/// <param name="assetName">Asset name.</param>
/// <param name="type">Type.</param>
/// <param name="callback">Callback.</param>
/// <param name="preload">If set to <c>true</c> preload asset and if <paramref name="memeryHold"/> is not "Always", ref count will no increase.</param>
/// <param name="memeryHold">Memery hold.</param>
public string LoadAssetAsync(string assetBundle, string assetName, System.Type type, OnLoadComplete callback = null, bool preload = false, MemeryHold memeryHold = MemeryHold.Once)
{
if (string.IsNullOrEmpty(assetBundle))
{
return(string.Empty);
}
//Debug.Log(string.Format("LoadAssetAsync {0}, {1}", assetName, Time.frameCount));
// if (type != typeof(UnityEngine.U2D.SpriteAtlas))
// assetBundle = assetBundle.ToLower();
//根据项目 获得资源的主键，主要是处理特殊资源
string key = AssetKey(assetBundle, assetName, type);
// 查找或创建一个AssetCache
AssetCache cache = GenAssetCache(key, assetBundle, assetName, type, memeryHold, preload);
// 判断是否正在Loading
if (IsInLoading(key))
{
// 如果同一个资源已经在Loading，不用再新开加载
RegistCallback(key, callback);
return(key);
}
// 注册回调
RegistCallback(key, callback);
// 如果缓存区已经有资源
if (cache.obj != null)
{
m_CallbackTemp.Add(key);
return(key);
}
AssetBundleLoadAssetOperation ao = AssetBundleManager.LoadAssetAsync(assetBundle, assetName, type);
if (ao != null)
{
m_InProgressOperations.Add(ao);
}
return(key);
}
/// <summary>
/// Loads the asset async.
/// </summary>
/// <param name="assetBundle">Asset bundle.</param>
/// <param name="assetName">Asset name.</param>
/// <param name="callback">Callback.</param>
/// <param name="preload">If set to <c>true</c> preload.</param>
/// <param name="memeryHold">Memery hold.</param>
/// <typeparam name="T">The 1st type parameter.</typeparam>
public string LoadAssetAsync <T>(string assetBundle, string assetName = null, OnLoadComplete callback = null, bool preload = false, MemeryHold memeryHold = MemeryHold.Once) where T : Object
{
return(LoadAssetAsync(assetBundle, assetName, typeof(T), callback, preload, memeryHold));
}
