Unity从AssetBundle加载场景

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由于Unity5有一套新的AssetBundle机制，所以这里讲的仅适用于Unity4.x

打包场景

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[MenuItem("Tools/BuildStreamingScene")]
public static void BuildStreamingScene()
{
    var path = SelectSaveFolderPath();
    if (string.IsNullOrEmpty(path))
    {
        return;
    }
    string[] levels = new string[] { "Assets/Game/Scenes/Level1.unity" };
    BuildPipeline.BuildStreamedSceneAssetBundle(levels, path + "Scenes.ab", BuildTarget.Android, BuildOptions.BuildAdditionalStreamedScenes);
}

加载场景

由于Application.LoadLevel实际上会延迟加载场景对象，如果提前调用ab.Unload(false)会造成场景对象被清空，所以ab.Unload(false)应在场景加载完成后调用 在OnLevelWasLoaded事件中Unload.

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AssetBundle ab { set; get; }
IEnumerator Start()
{
    yield return new WaitForSeconds(1.0f);
 
    WWW www = new WWW(new System.Uri(Application.streamingAssetsPath + "/scenes/Scenes.ab").AbsoluteUri);
    yield return www;
    ab = www.assetBundle;

    if (Application.CanStreamedLevelBeLoaded("Level1"))
    {
        Application.LoadLevel("Level1");
    }
    //ab.Unload(false); // 此处会施放AssetBundle会造成空场景
    yield return null;
}

void OnLevelWasLoaded(int levelId)
{
    if (ab != null)
    {
        ab.Unload(false);
    }
    Debug.Log("On Level Was Loaded .. " + Application.loadedLevelName);
}

完