/// <summary>
/// 同步加载AssetBundle
/// </summary>
/// <param name="bundleNames">需要加载的bundle集合</param>
/// <param name="groupName">缓存AssetBundle的场景。groupName不为空，则缓存AssetBundle。用于离开场景时销毁AssetBundle</param>
/// <returns></returns>
public Dictionary <string, AssetBundle> LoadAssetBundle(string[] bundleNames, string groupName = "")
{
//本次加载的AssetBundle集合
Dictionary <string, AssetBundle> loadedAssetBundleDic = new Dictionary <string, AssetBundle>();
foreach (var bundleName in bundleNames)
{
MyCachedAssetBundle cab = LoadSingle(bundleName, groupName);
if (cab == null)
{
continue;
}
loadedAssetBundleDic.Add(bundleName, cab.AssetBundle);
}
return(loadedAssetBundleDic);
}
/// <summary>
/// 同步加载单个AssetBundle
/// </summary>
/// <param name="bundleName"></param>
/// <param name="groupName"></param>
/// <returns></returns>
private MyCachedAssetBundle LoadSingle(string bundleName, string groupName)
{
LoadBundleInfo loadBundleInfo;
if (!_bundleInfoDic.TryGetValue(bundleName, out loadBundleInfo))
{
LogUtil.LogError($"加载AssetBundle失败，AssetBundle“{bundleName}”不存在");
return(null);
}
MyCachedAssetBundle temp;
if (_cachedAssetBundleDic.TryGetValue(bundleName, out temp))
{
if (string.IsNullOrEmpty(groupName))
{
temp.AddGroup(groupName);
}
return(temp);
}
Debug.Log("loadBundleInfo = " + loadBundleInfo);
LoadDependecies(bundleName, groupName);
AssetBundle ab;
//从streamingAssetsPath加载使用“AssetBundle.LoadFromFile”方法，同步加载更快。
if (loadBundleInfo.LoadUrl.Contains(Application.streamingAssetsPath))
{
ab = AssetBundle.LoadFromFile(loadBundleInfo.LoadUrl);
}
//否则加载使用“UnityWebRequest.GetAssetBundle”方法，此方法会自动从缓存加载数据，
//若缓存下没有数据，则会从服务器下载数据，并缓存到本地。
else
{
UnityWebRequest request = UnityWebRequest.GetAssetBundle(loadBundleInfo.LoadUrl, Hash128.Parse(loadBundleInfo.BundleInfo.bundleHash128), 0);
request.SendWebRequest();
while (!request.isDone)
{
Debug.Log(string.Format("Load AssetBundle :{0},progress = {1}", loadBundleInfo.BundleInfo.bundleName, request.downloadProgress));
}
if (request.error != null)
{
Debug.LogError($"加载AssetBundle失败，url:{loadBundleInfo.LoadUrl},error:{request.error}");
request.Dispose();
return(null);
}
ab = DownloadHandlerAssetBundle.GetContent(request);
request.Dispose();
}
MyCachedAssetBundle cab = new MyCachedAssetBundle(ab);
if (!string.IsNullOrEmpty(groupName))
{
cab.AddGroup(groupName);
_cachedAssetBundleDic.Add(bundleName, cab);
}
return(cab);
}
