public void UnloadUnusedBundles(int tag)
{
if (m_AssetBundles.Count == 0)
{
return;
}
AssetBundleReference abr = null;
Stack <string> checkQueue = StackPool <string> .Get();
HashSet <string> checkings = HashSetPool <string> .Get();
Action <string> checkFun = (key) =>
{
abr = m_AssetBundles[key];
checkings.Remove(key);
if (abr.isUnused())
{
//check dependencies
if (abr.dependencies != null && abr.dependencies.Count > 0)
{
foreach (AssetBundleReference sub in abr.dependencies)
{
//只有同样tag和空tag的ref才需要重新检查。
if (sub.isCache && (sub.tagCount == 0 || sub.HaveTag(tag)) && !checkings.Contains(sub.name))
{
checkQueue.Push(sub.name);
}
}
}
abr.Dispose();
m_AssetBundles.Remove(key);
}
};
foreach (string key in m_AssetBundles.Keys)
{
abr = m_AssetBundles[key];
if (abr.HaveTag(tag) && abr.isCache)
{
checkQueue.Push(key);
checkings.Add(key);
}
}
//recheck unused asset bundle
while (checkQueue.Count > 0)
{
checkFun(checkQueue.Pop());
}
StackPool <string> .Release(checkQueue);
HashSetPool <string> .Release(checkings);
}
protected void RemoveAssetBundlesTag(int tag)
{
if (m_AssetBundles.Count == 0)
{
return;
}
AssetBundleReference abr = null;
var iter = m_AssetBundles.GetEnumerator();
while (iter.MoveNext())
{
abr = iter.Current.Value;
if (abr.isCache && abr.HaveTag(tag))
{
abr.RemoveTag(tag);
}
}
}