使用AddressableAssets.LoadAssetsAsync

Question

关于如何使用Addressables.LoadAssetsAsync的文档很少。

当使用单个字符串作为第一个参数时，它的工作方式与使用Addressables.LoadAssetAsync相同。

所以这是有效的：

    Addressables.LoadAssetsAsync<TextAsset>
          ("questions",OnDownloadQuestionsCategoryComplete)
          .Completed += OnDownloadQuestionsComplete;

但这会产生一个异常：

    Addressables.LoadAssetsAsync<TextAsset>(
          new string[] {"questions"},
          OnDownloadQuestionsCategoryComplete)
          .Completed += OnDownloadQuestionsComplete;

生成的异常为：

ChainOperation of Type: System.Collections.Generic.IList`1[UnityEngine.TextAsset] 
failed because dependent operation failed
Exception of type 'UnityEngine.AddressableAssets.InvalidKeyException' was thrown., Key=System.String[]

Answer 1

在LoadAssetsAsync上使用键列表时，需要为MergeMode添加第三个参数。否则，您的列表将被视为IResourceLocation的列表。

private void DownloadQuestions()
{
    string[] arrQuestions = new string[]
    {
        "categories",
        "questions_1",
        "questions_2",
        "questions_3",
        "questions_4"
    };

    Addressables.LoadAssetsAsync<TextAsset>(
        arrQuestions,
        OnDownloadQuestionsCategoryComplete,
        Addressables.MergeMode.Union).Completed += OnDownloadQuestionsComplete;
}

private void OnDownloadQuestionsCategoryComplete(
    TextAsset obj) {}

private void OnDownloadQuestionsComplete(
    AsyncOperationHandle<IList<TextAsset>> listAssets) {}