Unity AssetBundle 踩坑記錄

editor 下選擇什么平台的 ab 加載

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

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

因為editor模式下所有的 platform ab 都是可以用的並且打 android ab 包必須要把platform轉換為android
但是自己寫的cg shader 如果打成 android ab 在editor 模式下沒有OpenGL 2.0 環境會報錯
只有打成windows包

但是好像其他 surface shader 是可以的

參考

關於打包shader丟失參數的問題

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 加載后

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

這里經過測試過發現相同名字不同后綴的單個資源 bundle 是可以的

但是相同名字相同后綴即使路徑不同也是不可以的
ab重復加載

解決方法

后期使用asset guid 來給ab命名 ab的asset name path 隨意 guid 也行 相對於 asset path 也行

不同機子打包的ab md5 值不同無語了

打 ab 最好把腳本打進去有概率會出現看不見的情況

如果在同一個場景對ab做清理對話會對當時的場景造成當時就材質丟失的情況就是出現閃一下紅色

最好就是弄個東西擋一下 比如ui 或者 弄一個單獨加載場景的場景 在擋着的時候進行卸載

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); 會收集依賴  比如 fbx@idle 等等

-----2   
BuildPipeline.BuildAssetBundleExplicitAssetNames(
        assets, tmp.ToArray(), savePath,
        BuildAssetBundleOptions.CollectDependencies
            | BuildAssetBundleOptions.CompleteAssets
                | BuildAssetBundleOptions.DeterministicAssetBundle,
                    BuildTarget.StandaloneWindows); ///不會收集依賴  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

從上述實驗看 BuildPipeline.BuildAssetBundle 和 BuildPipeline.BuildAssetBundleExplicitAssetNames 不同之處
就在於后者只打包你當前指定的資源，比如 fix 或者 texture2d 下面的 mesh 和 sprite 不會打包進去，
並且依賴比如 fbx@idle 也不會打包進去，不過這個還好，正好是我們當前的打包策略，依賴由我們自己掌握

這樣我們考慮 texture2d 的打包策略和 prefab 的打包策略不一樣了或者內存中動態生成sprite

參考

load-unity-43-sprites-with-assetbundles