アセットバンドルシミュレーターもどき

AssetBundleSimulator.cs

using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using UnityEngine.SceneManagement;

public class AssetBundleSimulator
{
	private AssetBundleSimulator (){}

	private static AssetBundleSimulator instance = new AssetBundleSimulator ();
	public static AssetBundleSimulator Instance {
		get {
			return instance;
		}
	}

	// assetBundle name / assetbundle
	// 一度読み込んだAssetBundleはキャッシュしておく（複数回呼出しても大丈夫なように）

	Dictionary<string, AssetBundle> assetBundleCache = new Dictionary<string, AssetBundle> ();

	public void Init ()
	{
		// AssetBundleの一覧を用意（有無チェック面倒）

#if ASSETBUNDLE_SIMULATOR && UNITY_EDITOR
		foreach( var assetBundleName in UnityEditor.AssetDatabase.GetAllAssetBundleNames())
		{
			assetBundleCache.Add(assetBundleName, null);
		}
#else
		var ab = AssetBundle.LoadFromFile(string.Format("{0}/{1}",Application.streamingAssetsPath, "StreamingAssets")); 
		var manifest = ab.LoadAsset<AssetBundleManifest>("AssetBundleManifest");
		foreach( var assetBundleName in manifest.GetAllAssetBundles())
		{
			assetBundleCache.Add(assetBundleName, null);
		}
		ab.Unload(false);
#endif
	}

	public void LoadScene (string assetBundleName, string sceneName, LoadSceneMode sceneMode)
	{
#if ASSETBUNDLE_SIMULATOR && UNITY_EDITOR
		string[] levelPaths = UnityEditor.AssetDatabase.GetAssetPathsFromAssetBundleAndAssetName (assetBundleName, sceneName);
		if (sceneMode == LoadSceneMode.Additive)
			UnityEditor.EditorApplication.LoadLevelAdditiveInPlayMode (levelPaths [0]);
		else
			UnityEditor.EditorApplication.LoadLevelInPlayMode (levelPaths [0]);
#else
		GetAssetBundle(assetBundleName);
		SceneManager.LoadScene(sceneName, sceneMode);
#endif
	}

	public IEnumerator LoadSceneAsync (string assetBundleName, string sceneName, LoadSceneMode sceneMode)
	{
#if ASSETBUNDLE_SIMULATOR && UNITY_EDITOR
		string[] levelPaths = UnityEditor.AssetDatabase.GetAssetPathsFromAssetBundleAndAssetName (assetBundleName, sceneName);
		if (sceneMode == LoadSceneMode.Additive)
			yield return UnityEditor.EditorApplication.LoadLevelAdditiveAsyncInPlayMode (levelPaths [0]);
		else
			yield return UnityEditor.EditorApplication.LoadLevelAsyncInPlayMode (levelPaths [0]);
#else
		GetAssetBundle(assetBundleName);
		yield return SceneManager.LoadSceneAsync(sceneName, sceneMode);
#endif
	}

	public T LoadAsset<T> (string assetBundleName, string assetName) where T : UnityEngine.Object
	{
#if ASSETBUNDLE_SIMULATOR && UNITY_EDITOR
		string[] assetPaths = UnityEditor.AssetDatabase.GetAssetPathsFromAssetBundleAndAssetName (assetBundleName, assetName);
		var obj = UnityEditor.AssetDatabase.LoadAssetAtPath<T> (assetPaths [0]);
		return obj;
#else
		return GetAssetBundle(assetBundleName).LoadAsset<T>(assetName);
#endif
	}

	public T[] LoadAllAssets<T>(string assetBundleName) where T : UnityEngine.Object
	{
#if ASSETBUNDLE_SIMULATOR && UNITY_EDITOR
		string[] assetPaths = UnityEditor.AssetDatabase.GetAssetPathsFromAssetBundle (assetBundleName);
		List<T> assetList = new List<T>();
		for(int i=0; i<assetPaths.Length; i++){
			var asset = UnityEditor.AssetDatabase.LoadAssetAtPath<T>(assetPaths[i]);
			if( asset != null ){
				assetList.Add(asset);
			}
		}

		return (T[])assetList.ToArray();
#else
		return GetAssetBundle(assetBundleName).LoadAllAssets<T>();
#endif
	}

	public AssetBundle GetAssetBundle(string assetBundleName)
	{
		var assetBundle =  assetBundleCache[assetBundleName];
		if( assetBundle == null){
			var path =  string.Format("{0}/{1}",Application.streamingAssetsPath, assetBundleName);
			assetBundle = AssetBundle.LoadFromFile(path);
			assetBundleCache [assetBundleName] = assetBundle;
		}
		return assetBundle;
	}

	public void UnloadAssetBundle(string assetBundleName)
	{
		var assetBndle = assetBundleCache [assetBundleName];
		if (assetBndle != null) {
			assetBndle.Unload (false);
		}
		assetBundleCache [assetBundleName] = null;
	}
}