Unity AssetBundle 踩坑记录

Unity AssetBundle 踩坑记录

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editor 下选择什么平台的 ab 加载

Material doesn't have a color property '_Color'
UnityEditor.DockArea:OnGUI()

Material doesn't have a float or range property 'PixelSnap'
UnityEditor.DockArea:OnGUI()

因为editor模式下所有的 platform ab 都是可以用的 并且打 android ab 包必须要把platform转换为android
但是自己写的cg shader 如果打成 android ab 在editor 模式下没有OpenGL 2.0 环境会报错
只有打成windows包

但是好像其他 surface shader 是可以的

参考

关于打包shader丢失参数的问题

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The asset bundle '' can't be loaded because another asset bundle with the same files are already loaded

create scene assetbundle Scenes/battle/MapEditor/53.unityin _LoadImmediate failed

可能的原因

• 相同名字 bundle load 加载后

  http://forum.unity3d.com/threads/asset-bundle-cant-be-the-same-name.190275

  这里经过测试过 发现相同名字不同后缀的单个资源 bundle 是可以的

  但是相同名字相同后缀即使路径不同也是不可以的

• ab重复加载

解决方法

后期使用asset guid 来给ab命名 ab的asset name path 随意 guid 也行 相对于 asset path 也行

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不同机子打包的ab md5 值不同 无语了

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打 ab 最好把脚本打进去 有概率会出现看不见的情况

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如果在同一个场景对ab做清理对话 会对当时的场景造成当时就材质丢失的情况 就是出现闪一下红色

最好就是弄个东西挡一下 比如ui 或者 弄一个单独加载场景的场景 在挡着的时候进行卸载

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load sprite from ab

[MenuItem("Build/Tools/Test")]
public static void TestSceneAssets() {
    UnityEngine.Object[] assets = 
        new UnityEngine.Object[] { 
             AssetDatabase.LoadAssetAtPath("Assets/Resources/Icon/ectype_chapter/1.png",
                 typeof(UnityEngine.Object)) };
    UnityEngine.Object mainAsset = assets[0];

    string savePath =
        "f:/assetbundles/windows/"
            + "d4fe2a6e186849f4086398d2ceeb0510"
                + ResourceCommon.assetbundleFileSuffix;
    BuildPipeline.BuildAssetBundle(
        mainAsset, assets, savePath,
            BuildAssetBundleOptions.CollectDependencies 
                | BuildAssetBundleOptions.CompleteAssets
                    | BuildAssetBundleOptions.DeterministicAssetBundle, 
                        BuildTarget.StandaloneWindows);
}


mTest6.cs

void OnGUI()
{
    if (GUI.Button(new Rect(10, 10, 150, 100), "I am a button")) Test();
}


void Test() 
{
    TextAsset bundleFile = Resources.Load("d4fe2a6e186849f4086398d2ceeb0510") as TextAsset;
    AssetBundle assetBundle = AssetBundle.CreateFromMemoryImmediate(bundleFile.bytes);
    Object[] assets = assetBundle.LoadAll();
    foreach (Object asset in assets)
    {
        Debug.Log("loaded asset " + asset.name + " of type " + asset.GetType());
    }
}

//loaded asset 1 of type UnityEngine.Texture2D
//loaded asset 1 of type UnityEngine.Sprite


string path = "Assets/NGUI/Examples/Models/Orc/FBX.FBX";
UnityEngine.Object[] assets = new UnityEngine.Object[] {
    AssetDatabase.LoadAssetAtPath(path, typeof(UnityEngine.Object)) };
string[] depends = AssetDatabase.GetDependencies(new string[] { path });
foreach (string str in depends)
{
    Debug.Log("depency: " + str);
} 
//depency: Assets/NGUI/Examples/Models/Orc/FBX@idle.FBX
//depency: Assets/NGUI/Examples/Models/Orc/FBX@idleBreaks.FBX
//depency: Assets/NGUI/Examples/Models/Orc/FBX.FBX


List<string> tmp = new List<string>();
int index = 0;
foreach (Object asset in assets){
    Debug.Log("loaded asset " + asset.name + " of type " + asset.GetType());
    index++;
    tmp.Add(index+"");
}
UnityEngine.Object mainAsset = assets[0];

string savePath =
    "f:/assetbundles/windows/"
        + "d4fe2a6e186849f4086398d2ceeb0510"
            + ResourceCommon.assetbundleFileSuffix;
-----1   
BuildPipeline.BuildAssetBundle(
    mainAsset, assets, savePath,
        BuildAssetBundleOptions.CollectDependencies
            | BuildAssetBundleOptions.CompleteAssets
                | BuildAssetBundleOptions.DeterministicAssetBundle,
                    BuildTarget.StandaloneWindows); 会收集依赖  比如 fbx@idle 等等

-----2   
BuildPipeline.BuildAssetBundleExplicitAssetNames(
        assets, tmp.ToArray(), savePath,
        BuildAssetBundleOptions.CollectDependencies
            | BuildAssetBundleOptions.CompleteAssets
                | BuildAssetBundleOptions.DeterministicAssetBundle,
                    BuildTarget.StandaloneWindows); ///不会收集依赖  比如 fbx@idle 等等



void Test() 
{
    TextAsset bundleFile = Resources.Load("d4fe2a6e186849f4086398d2ceeb0510") as TextAsset;
    AssetBundle assetBundle = AssetBundle.CreateFromMemoryImmediate(bundleFile.bytes);
    Object[] assets = assetBundle.LoadAll();
    foreach (Object asset in assets)
    {
        Debug.Log("loaded asset " + asset.name + " of type " + asset.GetType());
    }
}
-----1
//loaded asset FBX of type UnityEngine.GameObject
//loaded asset FBX of type UnityEngine.Transform
//loaded asset Orc of type UnityEngine.Mesh
//loaded asset FBX@idle of type UnityEngine.GameObject
//loaded asset FBX@idle of type UnityEngine.Transform
//loaded asset Orc of type UnityEngine.Mesh
//loaded asset idle of type UnityEngine.AnimationClip  .etc

------2
//loaded asset FBX of type UnityEngine.GameObject
//loaded asset FBX of type UnityEngine.Transform

从上述实验看 BuildPipeline.BuildAssetBundle 和 BuildPipeline.BuildAssetBundleExplicitAssetNames 不同之处
就在于后者只打包你当前指定的资源，比如 fix 或者 texture2d 下面的 mesh 和 sprite 不会打包进去 ，
并且依赖比如 fbx@idle 也不会打包进去 ， 不过这个还好，正好是我们当前的打包策略，依赖由我们自己掌握

这样我们考虑 texture2d 的打包策略和 prefab 的打包策略不一样了 或者 内存中动态生成sprite

参考

load-unity-43-sprites-with-assetbundles

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参考

Unity亞洲研習營台北站-AssetBundle工作流程

Unite 2014 - New AssetBundle Build System in Unity 5

new-assetbundle-build-system-in-unity-5-0.293975

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