public override T LoadAsset <T>(string path)
{
//已加载过
if (AssetDic.ContainsKey(path))
{
AssetDic[path].Retain();
return(AssetDic[path].obj as T);
}
string abName = GetAbName(path);
if (!IsLoadBundle(abName))
{
//依赖
LoadAssetBundleDepends(abName);
BundleInfo.CreateInfo(abName, LoadAssetBundle(abName));
}
else
{
bundleDic[abName].Retain();
}
T t = null;
if (bundleDic[abName].bundle != null)
{
t = bundleDic[abName].bundle.LoadAsset <T>(path);
}
AssetInfo.CreateInfo(path, t);
return(t);
}
IEnumerator LoadSceneCoroutine(string path, Action <AssetLoadInfo> action)
{
string abName = GetAbName(path);
if (!IsLoadBundle(abName))
{
//这里用同步加载了，有的场景引用的东西太多了，用异步加载太慢了
LoadAssetBundleDepends(abName);
BundleInfo.CreateInfo(abName, LoadAssetBundle(abName));
}
else
{
bundleDic[abName].Retain();
}
//加载场景
yield return(SceneManager.LoadSceneAsync(path, LoadSceneMode.Single));
if (lastSceneName != "")
{
UnLoadScene(lastSceneName);
}
lastSceneName = abName;
if (action != null)
{
AssetLoadInfo info = new AssetLoadInfo();
info.path = path;
action.Invoke(info);
}
}
private IEnumerator LoadAssetBundleDependsAsync(string abName)
{
string[] depends = Manifest.GetAllDependencies(abName);
for (int i = 0; i < depends.Length; i++)
{
string dependName = depends[i];
if (IsLoadBundle(dependName))
{
//Debug.Log("LoadAssetCoroutineHelper IsLoadBundle=" + dependName);
bundleDic[dependName].Retain();
continue;
}
//先添加进容器，防止重复调用
BundleInfo.CreateInfo(dependName, null);
//Debug.Log("LoadAssetCoroutineHelper dependName=" + dependName);
var dependRequest = AssetBundle.LoadFromFileAsync(GetLoadPath(dependName));
yield return(dependRequest);
bundleDic[dependName].bundle = dependRequest.assetBundle;
}
}
private void LoadAssetBundleDepends(string abName)
{
//比如加载A，包含引用B1和B2，B1和B2都引用了C，但是GetAllDependencies(A)方法只会算一个C的计数
//而如果之后再单独加载B1和B2时，如果不加载依赖会导致依赖计数不对
//所以这里使用了GetDirectDependencies
string[] depends = Manifest.GetDirectDependencies(abName);
for (int i = 0; i < depends.Length; i++)
{
string dependName = depends[i];
if (!IsLoadBundle(dependName))
{
BundleInfo.CreateInfo(dependName, LoadAssetBundle(dependName));
}
else
{
bundleDic[dependName].Retain();
}
//递归添加所有依赖，如果用GetAllDependencies会导致计数不对
LoadAssetBundleDepends(dependName);
}
}
IEnumerator LoadAssetCoroutineHelper <T>(string path) where T : Object
{
//Debug.Log("LoadAssetCoroutineHelper begin");
if (IsLoadAsset(path))
{
//如果重复对同样的资源进行异步加载，需要等待
if (prepareLoadDic.ContainsKey(path))
{
while (prepareLoadDic.ContainsKey(path))
{
yield return(null);
}
if (AssetDic.ContainsKey(path))
{
AssetDic[path].Retain();
yield break;
}
//这里有个极特殊情况，最开始没考虑到，同时异步加载两个资源时，目前的写法是加载第二个资源时进行等待
//但是有可能第一个资源加载完之后立刻卸载了，导致第二个资源等待完之后全都没了，所以需要触发重新加载
else
{
yield return(LoadAssetCoroutineHelper <T>(path));
}
}
else
{
AssetDic[path].Retain();
yield break;
}
}
AddPrepareLoadDic(path);
//先添加进容器
AssetInfo.CreateInfo(path, null);
string abName = GetAbName(path);
if (!IsLoadBundle(abName))
{
//先添加进容器，防止重复调用
BundleInfo.CreateInfo(abName, null);
yield return(LoadAssetBundleDependsAsync(abName));
//Debug.Log("LoadAssetCoroutineHelper abName=" + abName);
var bundleRequest = AssetBundle.LoadFromFileAsync(GetLoadPath(abName));
yield return(bundleRequest);
bundleDic[abName].bundle = bundleRequest.assetBundle;
}
else
{
//Debug.Log("LoadAssetCoroutineHelper IsLoadAbName=" + abName);
bundleDic[abName].Retain();
}
AssetBundle bundle = bundleDic[abName].bundle;
//Debug.Log("LoadAssetCoroutineHelper path=" + path);
AssetBundleRequest request = bundle.LoadAssetAsync <T>(path);
yield return(request);
AssetInfo.SetObject(path, request.asset);
//Debug.Log("LoadAssetCoroutineHelper over");
//移除加载中列表
RemovePrepareLoadDic(path);
//在异步加载时进来一个卸载，都加载完后在这里统一删除
if (unLoadCacheDic.ContainsKey(path))
{
Debug.Log("unLoadCacheDic=" + path);
RemoveUnLoadCacheDic(path);
UnLoadAsset(path);
}
}
