AssetBundle打包工具实现

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

public  class  Singleton<T> where T : class, new()
    {
        private static T _instance;
        private static readonly object syslock = new object();

        public static T Instance()
        {
            if (_instance == null)
            {
                lock (syslock)
                {
                    if (_instance == null)
                    {
                        _instance = new T();
                    }
                }
            }
            return _instance;
        }
    }

using System.IO;
using UnityEngine;

/// <summary>
/// 文件读取
/// </summary>
public class LocalFileMgr : Singleton<LocalFileMgr> {

#if UNITY_EDITOR
 
#if UNITY_STANDALONE_WIN
    public readonly string LocalFilePath = Application.dataPath + "/../AssetBundles/Windows/";
#elif UNITY_ANDROID
    public readonly string LocalFilePath = Application.dataPath + "/../AssetBundles/Windows/Android/";
#elif UNITY_IPHONE
    public readonly string LocalFilePath = Application.dataPath + "/../AssetBundles/Windows/iOS/";
#endif
#elif UNITY_ANDROID || UNITY_IPHONE || UNITY_STANDALONE_WIN
    public readonly string LocalFilePath = Application.persistentDataPath + "/";
#endif
    /// <summary>
    /// 读取本地文件到byte数组
    /// </summary>
    /// <param name="path"></param>
    /// <returns></returns>

    public byte[] GetBuffer(string path)
    {
        byte[] buffer = null;
        using (FileStream fs = new FileStream(path, FileMode.Open))
        {
            buffer = new byte[fs.Length];
            fs.Read(buffer, 0, buffer.Length);
        }
       return buffer;
    }
}

void Start () {

        byte[] buffer = LocalFileMgr.Instance().GetBuffer(@"F:\项目\Unity\YD_Destop_ImmersionClick\Assetbundles\Windows\Role\item.assetbundle");

        AssetBundle bundle = AssetBundle.LoadFromMemory(buffer);

        GameObject go = bundle.LoadAsset("Item") as GameObject;

        bundle.Unload(false);

        Instantiate(go);
    }

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

/// <summary>
/// 加载资源包
/// </summary>
public class AssetBundlLoad:IDisposable  {

    private AssetBundle bundle;

    // 构造方法
    public AssetBundlLoad(string assetBundlePath)
    {
        string fullPath = LocalFileMgr.Instance().LocalFilePath + assetBundlePath;
        bundle = AssetBundle.LoadFromMemory(LocalFileMgr.Instance().GetBuffer(fullPath));
    }

    public void Dispose()
    {
        if (bundle != null) bundle.Unload(false);
    }

    // 
    public T LoadAsset<T>(string name) where T : UnityEngine.Object
    {
        if (bundle == null) return default(T);
        return bundle.LoadAsset(name) as T;
    }
}

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

public class AssetBundleMgr : Singleton<AssetBundleMgr> {

    public GameObject Load(string path, string name)
    {
        using (AssetBundlLoad loder = new AssetBundlLoad(path))
        {
            return loder.LoadAsset<GameObject>(name);
        }
    }
}

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

public class LoadScene : MonoBehaviour {
    void Start () {

        GameObject obj = AssetBundleMgr.Instance().Load(@"Role\item.assetbundle", "Item"); 
        Instantiate(obj);
    }

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

public  class  Singleton<T> where T : class, new()
    {
        private static T _instance;
        private static readonly object syslock = new object();

        public static T Instance
        {
        get {
            if (_instance == null)
            {
                lock (syslock)
                {
                    if (_instance == null)
                    {
                        _instance = new T();
                    }
                    
                }            
            }
            return _instance;
        }
                    
        }

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

public class AssetBundleMgr : Singleton<AssetBundleMgr> {

    public GameObject Load(string path, string name)
    {
        using (AssetBundlLoad loder = new AssetBundlLoad(path))
        {
            return loder.LoadAsset<GameObject>(name);
        }
    }


    public AssetBundleLoaderAsync LoadAsyncObj(string path, string name)
    {
        GameObject obj = new GameObject("AssetBundleLoadAsync");
        AssetBundleLoaderAsync async =  obj.AddComponent<AssetBundleLoaderAsync>();
        async.Init(path, name);
        return async;
    }
}

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

public class LoadScene : MonoBehaviour {
    void Start () {c'c

       // 异步加载 
        AssetBundleLoaderAsync async = AssetBundleMgr.Instance.LoadAsyncObj(@"Role\item.assetbundle", "Item");
        async.OnLoadComplete = OnLoadComplete;
    }