1 using System.Collections;
2 using System.Collections.Generic;
3 using UnityEngine;
4
5 /// <summary>
6 /// LoadAssets打开某资源文件并加载其中的所有Prefab到场景中
7 /// </summary>
8 public class LoadAssets : MonoBehaviour
9 {
10 [HideInInspector]
11 public string address;//资源所在文件夹路径
12 public string fileToLoad;//资源文件名
13 private string manifestAssetBundleName;//Manifest文件，一般与所在文件夹名称相同
14 private AssetBundleManifest manifest;
15 private List<AssetBundle> assetBundles = new List<AssetBundle>();
16
17 private void Awake()
18 {
19 if(address.Equals(""))
20 return;
21 //Manifest文件的名称与生成的AssetBundle所在的文件夹同名
22 string[] ss = address.Split('/');
23 manifestAssetBundleName = ss[ss.Length - 2];
24 LoadManifest(address + manifestAssetBundleName);
25 LoadDepend(fileToLoad);
26
27 }
28 void OnGUI()
29 {
30 if (address.Equals(""))
31 return;
32 //第1步：读取Manifest
33 if (GUILayout.Button("地图加载（选择map.unity3d）"))
34 {
35 StartCoroutine(LoadObj(address, fileToLoad));
36 Caching.CleanCache();
37 }
38 }
39 //同步下载并读取Manifest文件
40 public void LoadManifest(string mainfestpath)
41 {
42 //Debug.Log("LoadManifest:"+mainfestpath);
43 AssetBundle manifestBundle = AssetBundle.LoadFromFile(mainfestpath);
44 if (manifestBundle != null)
45 {
46 manifest = (AssetBundleManifest)manifestBundle.LoadAsset("AssetBundleManifest");
47 }
48 }
49 //获取资源所依赖的资源并下载
50 void LoadDepend(string assetName)
51 {
52 string[] dps = manifest.GetAllDependencies(assetName);
53 for (int i = 0; i < dps.Length; i++)
54 {
55 StartCoroutine(LoadAsset(address, dps[i]));
56 }
57 }
58 //下载资源
59 IEnumerator LoadAsset(string url, string fileName)
60 {
61 //Debug.Log("LoadAsset:" + url+" "+fileName);
62 WWW www = WWW.LoadFromCacheOrDownload("file://" + url + fileName, manifest.GetAssetBundleHash(fileName));
63 yield return www;
64 assetBundles.Add(www.assetBundle);
65 www.Dispose();
66 }
67 //下载并实例化游戏对象
68 IEnumerator LoadObj(string url, string fileName)
69 {
70 //Debug.Log("LoadOBJ:" + url + " " + fileName);
71
72 WWW www = WWW.LoadFromCacheOrDownload("file://" + url + fileName, manifest.GetAssetBundleHash(fileName));
73 yield return www;
74 string[] AssetsNames = www.assetBundle.GetAllAssetNames();
75 foreach (string m in AssetsNames)
76 {
77 GameObject prefab = www.assetBundle.LoadAsset(m) as GameObject;
78 GameObject obj = GameObject.Instantiate(prefab);
79 }
80
81 assetBundles.Add(www.assetBundle);
82 www.Dispose();
83 UnloadUnuseAssetBundle();
84 }
85 //清理未使用资源所占用的内存
86 void UnloadUnuseAssetBundle()
87 {
88 foreach (var item in assetBundles)
89 {
90 item.Unload(false);
91 }
92 }
93 }
