/// <summary>
/// 获取并绑定指定Asste资源(上层获取并绑定特定类型Asset的接口)
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="owner"></param>
/// <param name="assetname"></param>
/// <returns></returns>
public override T getAsset <T>(UnityEngine.Object owner, string assetname)
{
if (owner != null)
{
var asset = loadAsset <T>(assetname);
if (asset != null)
{
// 绑定owner对象，用于判定是否还有有效对象引用AB资源
retainOwner(owner);
updateLastUsedTime();
return(asset);
}
else
{
ResourceLogger.logWar(string.Format("AB : {0}里不存在Asset : {1}，获取Asset失败!", AssetBundleName, assetname));
return(null);
}
}
else
{
ResourceLogger.logErr(string.Format("不能绑定Asset到空对象上!加载AB:{0} Asset:{1}失败!", AssetBundleName, assetname));
return(null);
}
}
/// <summary>
/// AB加载携程
/// </summary>
/// <returns></returns>
private IEnumerator assetBundleLoadAsync()
{
while (true)
{
if (ABAsyncQueue.Count > 0)
{
CurrentLoadingAssetBundleLoader = ABAsyncQueue.Dequeue();
//检查是否已经同步加载完成
//如果异步加载AB时，同步请求来了，打断异步后续逻辑
//LoadState == ResourceLoadState.None表明同步加载该资源已经完成，无需再异步返回
if (CurrentLoadingAssetBundleLoader.LoadState == ResourceLoadState.None)
{
ResourceLogger.logWar("有资源还未开始异步加载就被同步加载打断!");
}
else
{
CurrentLoadingAssetBundleLoader.LoadState = ResourceLoadState.Loading;
var abname = CurrentLoadingAssetBundleLoader.AssetBundleName;
var abpath = AssetBundlePath.GetABLoadFullPath(abname);
AssetBundleCreateRequest abrequest = null;
#if UNITY_EDITOR
//因为资源不全，很多资源丢失，导致直接报错
//这里临时先在Editor模式下判定下文件是否存在，避免AssetBundle.LoadFromFileAsync()直接报错
if (System.IO.File.Exists(abpath))
{
Debug.Log(string.Format("开始异步加载AB : {0}！", CurrentLoadingAssetBundleLoader.AssetBundleName));
abrequest = AssetBundle.LoadFromFileAsync(abpath);
}
else
{
Debug.LogError(string.Format("AB : {0}文件不存在！", CurrentLoadingAssetBundleLoader.AssetBundleName));
}
#else
abrequest = AssetBundle.LoadFromFileAsync(abpath);
#endif
Debug.Log(string.Format("等待异步加载AB : {0}！", abname));
yield return(abrequest);
//如果异步加载AB时，同步请求来了，打断异步后续逻辑
//LoadState == ResourceLoadState.None表明同步加载该资源已经完成，无需再异步返回
if (CurrentLoadingAssetBundleLoader.LoadState == ResourceLoadState.None)
{
ResourceLogger.log(string.Format("资源 : {0}加载已完成，异步加载被打断!", abname));
}
else
{
var assetbundle = abrequest.assetBundle;
if (assetbundle == null)
{
ResourceLogger.logErr(string.Format("Failed to load AssetBundle : {0}!", CurrentLoadingAssetBundleLoader.AssetBundleName));
}
CurrentLoadingAssetBundleLoader.onSelfABLoadComplete(assetbundle);
}
}
CurrentLoadingAssetBundleLoader = null;
}
else
{
yield return(null);
}
}
}
public override T loadAsset <T>(string assetname)
{
if (mIsReady)
{
if (mLoadedAssetMap.ContainsKey(assetname))
{
return(mLoadedAssetMap[assetname] as T);
}
else
{
if (AssetsPath == null)
{
ResourceLogger.logErr(string.Format("资源名 : {0}资源丢失，不存在！", AssetBundleName));
return(null);
}
else
{
// 图集需要全部加载才能加载到指定Sprite
// 暂时通过加载AssetBundle里所有的资源来加载查找指定sprite
if (typeof(T) == typeof(Sprite))
{
loadAllAsset <T>();
if (mLoadedAssetMap.ContainsKey(assetname))
{
return(mLoadedAssetMap[assetname] as T);
}
else
{
ResourceLogger.logErr(string.Format("找不到资源名 : {0}里 Asset资源 : {1}!", AssetBundleName, assetname));
return(null);
}
}
else
{
var assetpathes = AssetDatabase.GetAssetPathsFromAssetBundleAndAssetName(AssetBundleName, assetname);
if (assetpathes.Length == 1)
{
T asset = AssetDatabase.LoadAssetAtPath <T>(assetpathes[0]);
if (asset != null)
{
mLoadedAssetMap.Add(assetname, asset);
return(asset);
}
else
{
ResourceLogger.logErr(string.Format("找不到符合类型 : {0}，资源名: {1}，Asset : {2}资源！", typeof(T).GetType(), AssetBundleName, assetname));
return(null);
}
}
else if (assetpathes.Length > 1)
{
ResourceLogger.logWar(string.Format("资源名 : {0}里存在同名Asset : {1}资源！建议纠正Asset取名！", AssetBundleName, assetname));
// 有同名的情况下遍历选取第一个符合类型条件的资源
foreach (var assetpath in assetpathes)
{
T asset = AssetDatabase.LoadAssetAtPath <T>(assetpath);
if (asset != null)
{
mLoadedAssetMap.Add(assetname, asset);
return(asset);
}
}
ResourceLogger.logErr(string.Format("找不到符合类型 : {0}，资源名: {1}，Asset : {2}资源！", typeof(T).GetType(), AssetBundleName, assetname));
return(null);
}
else
{
ResourceLogger.logErr(string.Format("找不到资源名: {0}，Asset : {1}资源！", AssetBundleName, assetname));
return(null);
}
}
}
}
}
else
{
ResourceLogger.logErr(string.Format("异常状态，AB资源:{0}未就绪就请求Asset资源:{1}", AssetBundleName, assetname));
return(null);
}
}
