Unity AssetBundles经AppStoreConnect分发触发SIGABRT崩溃求助

问题描述 #

我正在用Unity开发包含AssetBundle的游戏，准备通过App Store分发，但加载AssetBundle时应用直接崩溃，抛出SIGABRT错误。

已按照Unity官方文档配置ODR（按需资源），但加载时request.error返回空字符串（预期应为null）；不过myLoadedAssetBundle.GetAllAssetNames()能正常返回完整资源列表。

AssetBundle已在XCode中正常显示（见下图），归档上传至App Store Connect后，On-Demand-Resources标记为“是”，但未显示资源数量，与文档描述不符。

环境信息 #

• Mac Studio M1 Ultra
• macOS 13.0.1 (22A400)
• Unity 2020.3.39f (Intel版本)
• Xcode 14.1 (14B47b)
• Visual Studio for Mac 17.4.1 (build 28)
• iPad 10代
• iPadOS 16.1.1 (20B101)

XCode资源截图 #

AssetBundle构建代码 #

public class CreateAssetBundles
{
    static string iosAssetBundleDirectory = "AssetBundles/iOS";
    [InitializeOnLoadMethod]
    static void SetupResourcesBuild()
    {
        UnityEditor.iOS.BuildPipeline.collectResources += CollectResources;
    }

    static UnityEditor.iOS.Resource[] CollectResources()
    {
        var bundles = AssetDatabase.GetAllAssetBundleNames ();
        
        var reslist = new List<UnityEditor.iOS.Resource> ();
        foreach (var b in bundles)
        {
            reslist.Add(new UnityEditor.iOS.Resource(b,Path.Combine(iosAssetBundleDirectory, b)).AddOnDemandResourceTags(b));
        }

        return reslist.ToArray();
    }

    [MenuItem ("Assets/Build AssetBundles/iOS")]
    static void BuildiOS ()
    {
        EnableDisableAtlas (true);
        
        var options = BuildAssetBundleOptions.None;

        bool shouldCheckODR = EditorUserBuildSettings.activeBuildTarget == BuildTarget.iOS;

#if UNITY_TVOS
        shouldCheckODR |= EditorUserBuildSettings.activeBuildTarget == BuildTarget.tvOS;
#endif

        if (shouldCheckODR)
        {
#if IOS_APP_BUNDLE
            if (PlayerSettings.iOS.useOnDemandResources)
            {
                options |= BuildAssetBundleOptions.UncompressedAssetBundle;
            }
#endif

#if ENABLE_IOS_APP_SLICING
            options |= BuildAssetBundleOptions.UncompressedAssetBundle;
#endif

            if (!Directory.Exists(iosAssetBundleDirectory))
            {
                Directory.CreateDirectory(iosAssetBundleDirectory);
            }
        }
        var ret = BuildPipeline.BuildAssetBundles (iosAssetBundleDirectory,
                                        options,
                                        BuildTarget.iOS);
        EnableDisableAtlas (false);
    }
}

AssetBundle加载代码 #

public override IEnumerator DownloadAssetBundleAsync (string bundleName, StringParameter statusParameter, Image progressBar, float remainingPercentiles)
{
    OnDemandResourcesRequest request = OnDemandResources.PreloadAsync(new string[] { bundleName });
    while (!request.isDone)
    {
        yield return null;
    }

    if (request.error != null && request.error != "")
    {
        //错误处理
    }
    DownloadFinished?.Invoke(bundleName);
    yield break;

}

public override IEnumerator LoadAssetBundleFromFileAsync (string bundleName, StringParameter statusParameter, Image progressBar, float remainingPercentiles, bool checkOutdated)
{
    var filepath = "res://" + bundleName;

    var bundleLoadRequest = AssetBundle.LoadFromFileAsync(filepath);
    yield return bundleLoadRequest;
    while (!bundleLoadRequest.isDone)
    {
        yield return null;
    }
    var myLoadedAssetBundle = bundleLoadRequest.assetBundle;

    if (myLoadedAssetBundle == null)
    {
        //错误处理
    }
    loadedAssetBundle = myLoadedAssetBundle;
}

SIGABRT崩溃日志 #

Incident Identifier: [已移除]
Beta Identifier:     [已移除]
Hardware Model:      iPad13,18
Process:             [已移除] [547]
Path:                /private/var/containers/Bundle/Application/[已移除]
Identifier:          [已移除]
Version:             0.9.1 (21)
AppStoreTools:       14C17
AppVariant:          1:iPad13,18:16
Beta:                YES
Code Type:           ARM-64 (原生)
Role:                前台
Parent Process:      launchd [1]
Coalition:           [已移除] [694]

日期/时间:           2022-12-12 13:45:12.5058 +0100
启动时间:         2022-12-12 13:45:05.0791 +0100
系统版本:          iPhone OS 16.1.1 (20B101)
发布类型:        用户版
报告版本:      104

异常类型:  EXC_CRASH (SIGABRT)
异常代码: 0x0000000000000000, 0x0000000000000000
触发线程:  35

应用特定信息:
abort() 被调用


最后异常调用栈:
0   CoreFoundation                         0x1d1171e88 __exceptionPreprocess + 164
1   libobjc.A.dylib                        0x1ca5178d8 objc_exception_throw + 60
2   Foundation                             0x1cb6259b0 -[_NSInlineData length] + 0
3   UnityFramework                         0x10fc45370 AssetCatalogFile::Read(unsigned long long, unsigned long long, void*, unsigned long long*, FileReadFlags) + 88806256 (AssetCatalogFileSystem.mm:52)
4   UnityFramework                         0x10fc45264 AssetCatalogFileSystemHandler::Read(FileEntryData&, VFS::FileSize, unsigned long long, void*, unsigned long long*, FileReadFlags) + 88805988 (AssetCatalogFileSystem.mm:178)
5   UnityFramework                         0x10f0c1074 FileAccessor::Read(VFS::FileSize, unsigned long long, void*, unsigned long long*, FileReadFlags) + 76730484 (VirtualFileSystem.cpp:1011)
6   UnityFramework                         0x10f6ad6c4 ArchiveStorageReader::ReadFromStorage(unsigned long long, unsigned long long, void*, unsigned long long*) + 82941636 (ArchiveStorageReader.cpp:587)
7   UnityFramework                         0x10f6a5f80 ArchiveStorageReader::Read(VFS::FileSize, unsigned long long, void*, unsigned long long*, FileReadFlags) + 82911104 (ArchiveStorageReader.cpp:173)
8   UnityFramework                         0x10f6a5d60 ArchiveReadFile::Read(VFS::FileSize, unsigned long long, void*, unsigned long long*, FileReadFlags) + 82910560 (ArchiveReadFile.cpp:42)
9   UnityFramework                         0x10f6a4240 ArchiveFileSystem::Read(FileEntryData&, VFS::FileSize, unsigned long long, void*, unsigned long long*, FileReadFlags) + 82903616 (ArchiveFileSystem.cpp:267)
10  UnityFramework                         0x10f0c1074 FileAccessor::Read(VFS::FileSize, unsigned long long, void*, unsigned long long*, FileReadFlags) + 76730484 (VirtualFileSystem.cpp:1011)
11  UnityFramework                         0x10f61714c File::Read(VFS::FileSize, void*, unsigned long, FileReadFlags) + 82325836 (FileVFS.cpp:443)
12  UnityFramework                         0x10f2b1ecc AsyncReadManagerThreaded::PumpRequests(dynamic_array<AsyncReadCommand*, 0ul>&, dynamic_array<AsyncReadCommand*, 0ul>&) + 78765772 (AsyncReadManagerThreaded.cpp:169)
13  UnityFramework                         0x10f2b191c AsyncReadManagerThreaded::ThreadEntry() + 78764316 (AsyncReadManagerThreaded.cpp:248)
14  UnityFramework                         0x10f2b12d0 AsyncReadManagerThreaded::StaticThreadEntry(void*) + 78762704 (AsyncReadManagerThreaded.cpp:118)
15  UnityFramework                         0x10f6c6994 Thread::RunThreadWrapper(void*) + 83044756 (Thread.cpp:81)
16  libsystem_pthread.dylib                0x21d84b6cc _pthread_start + 148
17  libsystem_pthread.dylib                0x21d84aba4 thread_start + 8

内容的提问来源于stack exchange，提问作者cagcoach