AssetBundle的加载和使用

share.unity3d、cubewall.unity3d文件的构建查看

https://blog.youkuaiyun.com/cuijiahao/article/details/105552405

 https://blog.youkuaiyun.com/cuijiahao/article/details/105482962

public class LoadFromFileExample : MonoBehaviour {       void Start () {         string path = "AssetBundles/cubewall.unity3d";           AssetBundle.LoadFromFile("share.unity3d");//加载共享依赖包           //单个提取资源         AssetBundle ab = AssetBundle.LoadFromFile(path);//同步加载AB包并返回一个AssetBundle对象         GameObject wallPrefab = ab.LoadAsset<GameObject>("CubeWall");//从AssetBundle里取出一个资源         Instantiate(wallPrefab);//将资源实例化到场景中           //提取所有资源         AssetBundle ab2 = AssetBundle.LoadFromFile("AssetBundles/share.unity3d");         Object[] objs = ab.LoadAllAssets();//加载AB包里所有的资源，并返回obj数组         foreach (Object o in objs)//实例化所有的资源         {             Instantiate(o);         } }

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AssetBundle的使用 

 

 1，AssetBundle.LoadFromMemoryAsync

从内存加载

using System.Collections; using System.IO; using UnityEngine;   public class LoadFromFileExample : MonoBehaviour {       // 异步加载函数返回值必须是IEnumerator     IEnumerator Start () {         string path = "AssetBundles/cubewall.unity3d";           //第一种加载AB的方式 LoadFromMemoryAsync  从内存进行加载         AssetBundleCreateRequest request = AssetBundle.LoadFromMemoryAsync(File.ReadAllBytes(path));//异步加载         yield return request;//等待加载完成         AssetBundle ab = request.assetBundle;//获取AssetBundle对象           //使用里面的资源         GameObject wallPrefab = ab.LoadAsset<GameObject>("CubeWall");         Instantiate(wallPrefab); }       // 同步加载不需要IEnumerator     void Start () {         string path = "AssetBundles/cubewall.unity3d";                //同步加载         AssetBundle ab1 = AssetBundle.LoadFromMemory(File.ReadAllBytes(path)); //File.ReadAllBytes是将文件转换为byte[]         AssetBundle ab = request.assetBundle;//获取AssetBundle对象         //使用里面的资源         GameObject wallPrefab = ab.LoadAsset<GameObject>("CubeWall");         Instantiate(wallPrefab);     } }

 2，AssetBundle.LoadFromFile

本地加载

using System.Collections; using System.IO; using UnityEngine;   public class LoadFromFileExample : MonoBehaviour {       // 异步加载函数返回值必须是IEnumerator     IEnumerator Start () {         string path = "AssetBundles/cubewall.unity3d";           //第二种加载AB的方式 LoadFromFile 从本地进行加载         //异步加载         AssetBundleCreateRequest request = AssetBundle.LoadFromFileAsync(path);         yield return request;//等待返回         AssetBundle ab = request.assetBundle;//获取AssetBundle对象         //使用里面的资源         GameObject wallPrefab = ab.LoadAsset<GameObject>("CubeWall");         Instantiate(wallPrefab);     } }

3，WWW.LoadFromCacheOrDownload

网络加载

using System.Collections; using System.IO; using UnityEngine;   public class LoadFromFileExample : MonoBehaviour {       // 异步加载函数返回值必须是IEnumerator     IEnumerator Start () {         string path = "AssetBundles/cubewall.unity3d";           //第三种加载AB的方式 WWW         while (Caching.ready == false)         {             yield return null;         }         //本地         WWW www = WWW.LoadFromCacheOrDownload(@"file://E:\Unity Project Workspace\AssetBundleProject\AssetBundles\cubewall.unity3d", 1);         //网络         WWW www = WWW.LoadFromCacheOrDownload(@"http://localhost/AssetBundles/cubewall.unity3d", 1);//第二个参数是版本号         yield return www;         if (string.IsNullOrEmpty(www.error) == false)         {             Debug.Log(www.error); yield break;         }         AssetBundle ab = www.assetBundle;     } }

4，UnityWebRequest 

using System.Collections; using System.IO; using UnityEngine; using UnityEngine.Networking;   public class LoadFromFileExample : MonoBehaviour {       // 异步加载函数返回值必须是IEnumerator     IEnumerator Start () {         string path = "AssetBundles/cubewall.unity3d";                 //第四种方式 使用UnityWebRequest         string uri = @"file:///E:\Unity Project Workspace\AssetBundleProject\AssetBundles\cubewall.unity3d";//本地         string uri = @"http://localhost/AssetBundles/cubewall.unity3d";//服务端         UnityWebRequest request = UnityWebRequest.GetAssetBundle(uri);         yield return request.Send();//开始从服务端下载         //获取AssetBundle的两种方式         AssetBundle ab = DownloadHandlerAssetBundle.GetContent(request);//第一种方式         AssetBundle ab = (request.downloadHandler as DownloadHandlerAssetBundle).assetBundle;//第二种方式           //使用里面的资源         GameObject wallPrefab = ab.LoadAsset<GameObject>("CubeWall");         Instantiate(wallPrefab);           //保存到本地         File.WriteAllBytes("要保存的位置", request.downloadHandler.data);     } }

 保存到本地

//保存到本地

File.WriteAllBytes("要保存的位置", request.downloadHandler.data);

从AssetBundle里面加载资源 

GetAllAssetNames	获取所有的资源名字
LoadAllAssets	获取所有的资源（不包括依赖的资源）
LoadAllAssetsAsync	异步获取所有资源（不包括依赖的资源）
LoadAsset	获取资源
LoadAssetAsync	异步获取资源
LoadAssetWithSubAssets	获取所有的子资源

通过Manifest文件加载所有的包

通过Manifest文件的得到某个包的依赖 

using System.Collections; using System.IO; using UnityEngine; using UnityEngine.Networking;   public class LoadFromFileExample : MonoBehaviour {       // 异步加载函数返回值必须是IEnumerator     void Start () {         string path = "AssetBundles/cubewall.unity3d";           //加载AssetBundles文件夹里的AssetBundles文件         AssetBundle manifestAB = AssetBundle.LoadFromFile("AssetBundles/AssetBundles");         //加载AssetBundleManifest         AssetBundleManifest manifest = manifestAB.LoadAsset<AssetBundleManifest>("AssetBundleManifest");         //获取所有的AssetBundle包的名字（包括依赖包的名字）         foreach (string name in manifest.GetAllAssetBundles())         {             print(name);         }         //获取cubewall.unity3d这个包所依赖的所有包的名字         string[] strs = manifest.GetAllDependencies("cubewall.unity3d");         //加载所有依赖的包         foreach (string name in strs)         {             print(name);             AssetBundle.LoadFromFile("AssetBundles/" + name);//加载依赖的包         }     } }