protected IEnumerator InstantiateGameObjectAsync(string assetBundleName, string assetName)
{
// This is simply to get the elapsed time for this phase of AssetLoading.
float startTime = Time.realtimeSinceStartup;
// Load asset from assetBundle.
AssetBundleLoadAssetOperation request = AssetBundleManager.LoadAssetAsync(assetBundleName, assetName, typeof(GameObject));
if (request == null)
{
Debug.LogError("Failed AssetBundleLoadAssetOperation on " + assetName + " from the AssetBundle " + assetBundleName + ".");
yield break;
}
// 方案一
// yield return StartCoroutine(request);
// 方案二
{
while (request.Process() < 0.9f)
{
// TODO 进度条处理
Debug.Log("加载：" + request.Process() * 100 + "/100");
yield return(new WaitForEndOfFrame());
}
while (!request.IsDone())
{
Debug.Log("加载：" + request.Process() * 100 + "/100");
yield return(new WaitForEndOfFrame());
}
Debug.Log("加载：100/100");
}
// Get the Asset.
GameObject prefab = request.GetAsset <GameObject> ();
// Instantiate the Asset, or log an error.
if (prefab != null)
{
GameObject.Instantiate(prefab);
}
else
{
Debug.LogError("Failed to GetAsset from request");
}
// Calculate and display the elapsed time.
float elapsedTime = Time.realtimeSinceStartup - startTime;
Debug.Log(assetName + (prefab == null ? " was not" : " was") + " loaded successfully in " + elapsedTime + " seconds");
}
/// <summary>
/// 网络资源加载
/// 异步运行，内部异步加载，获得资源对象，如果资源对象为空，尝试加载，并且通过回调返回加载的资源对象，允许添加加载进度回调
/// </summary>
/// <param name="assetBundleName"></param>
/// <param name="assetName"></param>
/// <param name="loadedListener"></param>
/// <param name="progressListener"></param>
/// <returns></returns>
public IEnumerator LoadAssetObjectCoroutineAsync(string assetName, string assetBundleName, Action <UnityEngine.Object> loadedListener = null, Action <float> progressListener = null)
{
yield return(null);
AssetInfo assetInfo = GetOrAddAssetInfo(assetName, assetBundleName);
// 资源已加载
if (assetInfo.AssetObjectCache != null)
{
if (progressListener != null)
{
progressListener(1.0f);
yield return(null);
}
if (loadedListener != null)
{
loadedListener(assetInfo.AssetObjectCache);
}
}
// 资源未加载
else
{
AssetBundleLoadAssetOperation request = AssetBundleManager.LoadAssetAsync(assetInfo.AssetBundleName, assetInfo.AssetName, typeof(UnityEngine.Object));
if (request == null)
{
yield break;
}
// 最多尝试100次（10秒）。防止资源不存在不停下载的情况 TODO 可能有BUG
int maxTry = 0;
while (request.Process() < 0.9f)
{
if (request.Process() < 0.001f && maxTry++ > 100)
{
Debug.LogError("网络无法获得资源:" + assetInfo.AssetBundleName + " " + assetInfo.AssetName);
}
// TODO 进度条处理
Debug.Log("加载：" + request.Process() * 100 + "/100");
progressListener(request.Process());
yield return(new WaitForSeconds(0.1f));
}
while (!request.IsDone())
{
maxTry++;
Debug.Log("加载：" + request.Process() * 100 + "/100");
progressListener(request.Process());
yield return(new WaitForSeconds(0.1f));
}
Debug.Log("加载：100/100");
assetInfo.AssetObjectCache = request.GetAsset <GameObject>();
}
}