笔记：
一.直接导入Project文件下
二.打开window工具栏下的AssetBundle Browser，如果有则导入成功
三，创建AB包
1.创建资源，选择New名字，名字不区分大小写
2.打开window工具栏下的AssetBundle Browser
3.选择要构建的平台，建立AB包文件
4.如果没有报错，则表示创建成功，会在Assets同级目录下生成AssetBundles文件夹，打开该文件夹下一级目录的名字和Output Path最后一级名字相同
5.打开后里面有4个文件
6.写代码载入
using System.Collections; using System.Collections.Generic; using UnityEngine; public class LessonAB : MonoBehaviour { // Use this for initialization void Start () { //1.加载AB包 AssetBundle ab = AssetBundle.LoadFromFile("AssetBundles/StandaloneWindows/Prefabs"); //AssetBundle ab = AssetBundle.LoadFromFile(Application.streamingAssetsPath + "/Prefabs"); //或者streamingAssetsPath路径下的 //2.从ab保重加载资源 GameObject cubePrefab = ab.LoadAsset<GameObject>("Cube"); //3.克隆显示预制体 Instantiate(cubePrefab); } // Update is called once per frame void Update () { } }
AB包管理器：ABManager
using System.Collections; using System.Collections.Generic; using UnityEngine; /// <summary> /// AB包的管理器， 单例类， 需要继承MonoBehaviour，异步加载时需要使用协同程序 /// </summary> public class ABManager : AutoMonoSingle<ABManager> { //解决不重复加载的问题， 将加载进来的AB包存储到一个字典中 //键： ab包的名字， 值： ab包 private Dictionary<string, AssetBundle> loaded = new Dictionary<string, AssetBundle>(); //加载AB包的路径 private string path; public string Path { get { if (path == null || path == "") { //根据平台的不同，使用不同的路径 #if UNITY_EDITOR || UNITY_STRANDALONE_WIN path = Application.streamingAssetsPath + "/"; #else path = Application.persistentDataPath + "/"; #endif } return path; } } //解决加载AB包的同时，加载依赖， 依赖是从主包来的 //平台不同，主包的名字不同 public string MainABName { get { #if UNITY_STANDALONE_WIN return "StandaloneWindows"; #elif UNITY_ANDROID return "Android"; #elif UNITY_IOS return "iOS"; #else return "Main"; #endif } } /// <summary> /// 主包单独存储， 经常使用 /// </summary> private AssetBundle main; /// <summary> /// 从中获取每个ab包的依赖， 经常使用 /// </summary> private AssetBundleManifest manifest; /// <summary> /// 通过AB包的名字加载AB包 /// </summary> /// <param name="abName">AB包的名字</param> /// <returns></returns> public AssetBundle Load(string abName) { AssetBundle ab = null; //判断ab包是否加载过 if (!loaded.TryGetValue(abName, out ab)) { //未加载过加载 //加载主包与Manifest //判断主包是否加载过 if (main == null) { main = AssetBundle.LoadFromFile(Path + MainABName); } if (manifest == null) { manifest = main.LoadAsset<AssetBundleManifest>("AssetBundleManifest"); } //通过Manifest获取AB包的依赖 string[] deps = manifest.GetAllDependencies(abName); //加载AB包前， 先加载AB包对应的依赖的AB包 foreach (string depName in deps) { //不能递归加载依赖项， 如果两个AB包相互依赖，那么最终递归就没有跳出条件 //Load(depName); 两个包互相依赖的情况下，直接死递归 //判断依赖是否加载过 if (!loaded.ContainsKey(depName)) { AssetBundle depAB = AssetBundle.LoadFromFile(Path + depName); //将依赖的AB包存储到字典中 loaded.Add(depName, depAB); } } //再加载当前要加载的AB包 ab = AssetBundle.LoadFromFile(Path + abName); //添加到字典中 loaded.Add(abName, ab); } return ab; } /// <summary> /// 卸载指定名字的AB包 /// </summary> /// <param name="abName">AB包的名字</param> /// <param name="unloadAllLoadedObjects">是否同时卸载从AB包中加载的资源</param> public void Unload(string abName, bool unloadAllLoadedObjects = false) { AssetBundle ab = null; //判断是否加载过 if (loaded.TryGetValue(abName, out ab)) { //只有获取到AB包的情况下才卸载 ab.Unload(unloadAllLoadedObjects); //将其中字典中移除 loaded.Remove(abName); } } /// <summary> /// 卸载所有的AB包 /// </summary> /// <param name="unloadAllLoadedObjects"></param> public void UnloadAll(bool unloadAllLoadedObjects = false) { //遍历加载过的所有的AB包，依次卸载 foreach (var ab in loaded.Values) { ab.Unload(unloadAllLoadedObjects); } //清空字典 loaded.Clear(); } /// <summary> /// 非泛型的，从指定的AB包中加载指定的资源 /// </summary> /// <param name="abName">AB包的名字</param> /// <param name="assetName">资源的名字</param> /// <returns></returns> public Object LoadAsset(string abName, string assetName) { //加载AB包 AssetBundle ab = Load(abName); //再从AB包中加载资源 if (ab != null) { return ab.LoadAsset(assetName); } return null; } /// <summary> /// 泛型，从指定的AB包中加载指定的资源 /// </summary> /// <typeparam name="T"></typeparam> /// <param name="abName"></param> /// <param name="assetName"></param> /// <returns></returns> public T LoadAsset<T>(string abName, string assetName) where T : Object { //加载AB包 AssetBundle ab = Load(abName); //再从AB包中加载资源 if (ab != null) { return ab.LoadAsset<T>(assetName); } return default(T); } }