// 查看是否有依赖项
private string[] GetAbDependencies(string url)
{
// 加载的是 AssetBundle，没有依赖相
if (url.Equals(_assetBundleName) || url.Equals(_assetBundleName + GetExtension( )))
{
return(null);
}
string urlExt = Path.GetExtension(url);
if (urlExt != GetExtension( ))
{
url = url + GetExtension( );
}
AssetBundleCache cb = this._cacheMgr.GetAssetBundle(_assetBundleName + GetExtension( ));
if (cb == null)
{
throw new Exception(" Get AssetBundle is null");
}
AssetBundleManifest manifest = cb.AB.LoadAsset("AssetBundleManifest") as AssetBundleManifest;
if (manifest == null)
{
throw new Exception(" Get AssetBundleManifest is null");
}
return(manifest.GetAllDependencies(url));
}
public void AsyncLoad(string url, AsyncLoadCallBack.CallBack onAsyncRequestCallBack, object context)
{
url = url + GetExtension( );
//UnityEngine.Debug.Log( string.Format( " ## {0}", url ) );
AssetBundleCache cab = _cacheMgr.GetAssetBundle(url);
if (cab == null)
{
CreateRequest(url, onAsyncRequestCallBack, context);
return;
}
// 缓存中已有AB数据，检查一下依赖项量是否完成（有可能正在加载）
string[] dependsObj = GetAbDependencies(url);
if (dependsObj == null)
{
// 没有依赖项，缓存中已有AB数据，直接回调
if (onAsyncRequestCallBack != null)
{
onAsyncRequestCallBack(context, cab.AB);
}
return;
}
// 遍历依赖项是否在缓存中
bool isOk = true;
foreach (var one in dependsObj)
{
if (_cacheMgr.GetAssetBundle(one) != null)
{
continue;
}
isOk = false;
break;
}
if (isOk)
{
// 缓存中有全部数据，直接回调
if (onAsyncRequestCallBack != null)
{
onAsyncRequestCallBack(context, cab.AB);
}
return;
}
// AB包不全，需要创建requset
CreateRequest(url, onAsyncRequestCallBack, context);
}
public AssetBundle GetAb(string url)
{
string urlExt = Path.GetExtension(url);
if (urlExt != GetExtension( ))
{
url = url + GetExtension( );
}
AssetBundleCache abCache = _cacheMgr.GetAssetBundle(url);
if (abCache == null)
{
return(null);
}
return(abCache.AB);
}
public void SetDontRelease(string url)
{
string urlExt = Path.GetExtension(url);
if (urlExt != GetExtension( ))
{
url = url + GetExtension( );
}
AssetBundleCache abCache = _cacheMgr.GetAssetBundle(url);
if (abCache == null)
{
UnityEngine.Debug.Log(string.Format("!!!!! SetDontRelease failed. {0}", url));
return;
}
// todo 如果有依赖项，依赖项也需要DontRelease
abCache.SetDontRelease( );
}