AssetBundle的定義和作用: 1，AssetBundle是一個壓縮包包含模型、貼圖、預製體、聲音、甚至整個場景，可以在遊戲執行的時候被載入； 2，AssetBundle自身儲存著互相的依賴關係； 3，壓縮包可以使用LZMA和LZ4壓縮演算法，減少包大小，更快的進行網路傳輸； 4，把一些可以下載內容放在AssetBundle裡面，可以減少安裝包的大小；

AssetBundle使用流程:

1. 進行AB包的時候進行屬性設定
2. 將設定好的屬性(預製體…) 壓縮成為一個特定的檔案 程式碼壓縮的!!!
3. 放置到web/gameserver上面
4. 客戶端經過檢驗之後下載
5. 下載之後解壓例項化

編譯器擴充套件:

編譯器擴充套件

using UnityEngine;
using UnityEditor;
using System.IO;

public class BuildAssetBundleTools{

	[MenuItem("AssetBundleTools/BuildAB")]
    public static void
 
 Building()
    {
        
        string _path = Application.streamingAssetsPath + "\\Windows";
        BuildPipeline.BuildAssetBundles(_path, BuildAssetBundleOptions.None, BuildTarget.StandaloneWindows64);
    }
}

依賴

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

public
 
 class LoadingMan : MonoBehaviour {

    public string Name;  //定義一個需要載入或例項化物體的名字
    string _path;   //路徑
    string _manth;
    private List<AssetBundle> ManListAB;   //定義一個列表  用來儲存載入完畢後的依賴關係
    void Start () {
        ManListAB = new List<AssetBundle>();
        _path = Application.streamingAssetsPath + "/Windows/";   //  "/Windows/Name"   寫活了
        _manth = Application.streamingAssetsPath + "/Windows/Windows";  //路徑檔案地址

        AssetBundle manAB = AssetBundle.LoadFromFile(_manth);  //載入路徑
        AssetBundleManifest manifest = manAB.LoadAsset<AssetBundleManifest>("AssetBundleManifest");  //Windows所有的依賴關係
        string[] depen = manifest.GetAllDependencies(Name);  //得到你想要的那個物體的 依賴關係(材質AssetBundle的名稱)
        if (depen.Length != 0)
        {
            foreach (string v in depen)  //遍歷string[]裡面的依賴關係
            {
                //呼叫LoadByName方法   挨個載入依賴關係 並存儲在列表裡
                Debug.Log(v);
                ManListAB.Add(LoadByName(v));
            }
        }
        //載入物體資訊 並開始例項化
        AssetBundle ab = AssetBundle.LoadFromFile(_path + Name);  //檔案拼接  拼成完整的路徑地址
        GameObject obj = ab.LoadAsset<GameObject>("Remo");
        Instantiate(obj);
        foreach (var v in ManListAB)
        {
            v.Unload(false);
        }
        ab.Unload(false);//必須要有這句話 否則重複載入 報錯
        //下面例項化的物體將沒有材質  因為依賴關係被釋放
        AssetBundle ab01 = AssetBundle.LoadFromFile(_path + Name);
        GameObject obj01 = ab01.LoadAsset<GameObject>("Remo");
        Instantiate(obj01, Vector3.one, Quaternion.identity);
    }

    void Update () {
        
    }
    private AssetBundle LoadByName(string name)
    {
        return AssetBundle.LoadFromFile(_path + name);
    }
}

簡單載入

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

public class Loading : MonoBehaviour {

    private Vector3 a = new Vector3(3, 0, 0);
    
    // Use this for initialization
    void Start () {
        string _path = Application.streamingAssetsPath + "\\Windows\\asd";
        AssetBundle ab = AssetBundle.LoadFromFile(_path);
        if (ab == null)
        {
            Debug.LogError("載入失敗");
            return;
        }
        GameObject obj = ab.LoadAsset<GameObject>("Cube");
        if (obj != null)
        {
            Instantiate(obj);
        }else
        {
            Debug.LogError("該資源不存在");
        }
        StartCoroutine("Creat",ab);
	}
    IEnumerator Creat(AssetBundle ab)
    {
        yield return new WaitForSeconds(3);
        //ab.Unload(false);
        yield return new WaitForSeconds(5);
        GameObject obj = Instantiate(ab.LoadAsset<GameObject>("Sphere"),a,Quaternion.identity);
    }
 }

利用WWW載入

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

public class WWWLL : MonoBehaviour {

	// Use this for initialization
	void Start () {
        string _path = "file://" + Application.streamingAssetsPath + "/Windows/char";
        StartCoroutine("Load", _path);
    }
    IEnumerator Load(string path)
    {
        using (WWW load01 = new WWW(path))
        {
            yield return load01;
            if (load01 != null)
            {

                AssetBundle ab = load01.assetBundle;
                if (ab != null)
                {
                    GameObject obj = ab.LoadAsset<GameObject>("Capsule");
                    Instantiate(obj);
                }
            }else
            {
                Debug.LogError("載入失敗");
            }

        }
    }