Unity3D引擎WWW资源加载和缓存（AssetBundle、Texture、Audio）

来源：互联网发布：电脑淘宝微淘在哪里找编辑：程序博客网时间：2024/05/16 11:51

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为了便捷大家快速的开发，本文提供一个封装后的工具类，以便大家参考和交流！

using UnityEngine;using System.Collections;using System.Collections.Generic;using System.IO;public class DownLoadCenter : MonoBehaviour {    //定义回调    public delegate void SetValueCallBack(Object obj);    //声明回调    public SetValueCallBack CallBack;    //文本回调    public delegate void SetValueCallBack_Text(string txt);    public SetValueCallBack_Text CallBack_Text;    public ArrayList _loadedBundle = new ArrayList();    public ArrayList _loadedBundleName = new ArrayList();    /// <summary>    /// 加载进度    /// </summary>    public float LoadProgress = 0f;    private bool loadStart = false;    private WWW w;    void Update()    {        if (loadStart)        {            LoadProgress = w.progress;            if (LoadProgress == 1.0f)                loadStart = false;        }    }    /// <summary>    /// url是网络加载地址，name是资源名称(带后缀)，type是读取类型（assetbundle,texture,audio3种类型）,id是图片加载的时候传入的唯一名称(替代name),isUnloadNow是是否发消息之后就释放资源(非assetbundle)    /// </summary>    /// <param name="url"></param>    /// <param name="name"></param>    /// <param name="type"></param>    /// <param name="poolDic"></param>    public void LoadAsset(string url, string name, string type , string id = null , bool isUnloadNow = true)    {        //如果已经加载过直接返回        if(type == "assetbundle" && _loadedBundleName.Contains(name)){            for (int i = 0; i < _loadedBundle.Count; i++ )            {                Dictionary<string, Object> _dic = _loadedBundle[i] as Dictionary<string,Object>;                if (_dic.ContainsKey(name))                {                    AssetBundle _bundle = _dic[name] as AssetBundle;                    CallBack(_bundle);                    return;                }            }        }        //TODO:version对比        if(false){            Debug.Log("读取本地模型");            StartCoroutine(LoadAssetFromLocal(Application.persistentDataPath + "/" + name, type, name, id , isUnloadNow));        }        else        {            Debug.Log("读取网络模型");            StartCoroutine(LoadAssetFromWWW(url + name, type, name, id , isUnloadNow));        }    }    //读取本地文件    IEnumerator LoadAssetFromLocal(string path, string type, string name, string id , bool isUnloadNow)    {        string _name = name;        if (id != null)        {            _name = id;        }#if UNITY_EDITOR        string filepath = "file:///" + Application.persistentDataPath + "/" + _name;#elif UNITY_IPHONE      string filepath = Application.persistentDataPath + "/" + _name;#elif UNITY_ANDROID      string filepath = "jar:file://" +  Application.persistentDataPath + "/" + _name;#endif        Debug.Log("本地获取路径:"+filepath);        w = new WWW(filepath);        loadStart = true;        yield return w;        if (w.isDone && w.error == null)        {            Dictionary<string, Object> _dic = new Dictionary<string, Object>();            Object _asset = null;            string _strAsset = null;            if (type == "assetbundle")            {                _asset = w.assetBundle;                //存入已加载bundle                _dic.Add(name, _asset);                _loadedBundle.Add(_dic);                _loadedBundleName.Add(name);            }            else if (type == "texture")            {                _asset = w.texture;            }            else if (type == "audio")            {                _asset = w.audioClip;            }            else if(type == "text")            {                _strAsset = w.text;            }            else            {                Debug.LogError("资源加载类型错误:" + type);            }            //判断类型是否是 文本            if(type == "text")            {                CallBack_Text(_strAsset);            }            else            {                CallBack(_asset);            }            if (isUnloadNow)            {                Resources.UnloadUnusedAssets();            }        }        else {            Debug.LogError("资源加载出错:" + w.error.ToString());        }    }    //读取网络文件，并存入本地    IEnumerator LoadAssetFromWWW(string url, string type, string name, string id ,bool isUnloadNow)    {        Debug.Log(url);        w = new WWW(url);        loadStart = true;        yield return w;        if (w.isDone)        {            Dictionary<string, Object> _dic = new Dictionary<string, Object>();            Object _asset = null;            string _strAsset = null;            if (type == "assetbundle")            {                _asset = w.assetBundle;                //存入已加载bundle                _dic.Add(name, _asset);                _loadedBundle.Add(_dic);                _loadedBundleName.Add(name);            }            else if (type == "texture")            {                _asset = w.texture;            }            else if (type == "audio")            {                _asset = w.audioClip;            }            else if (type == "text")            {                _strAsset = w.text;            }            else            {                Debug.LogError("资源加载类型错误:" + type);            }            //判断类型是否是 文本            if (type == "text")            {                string[] _fileNames=Directory.GetFiles(Application.persistentDataPath+"/");                foreach(string file in _fileNames)                {                    File.Delete(file);                }                CallBack_Text(_strAsset);                CreateTextFile(Application.persistentDataPath+"/", name, _strAsset);            }            else            {                byte[] _assetByte = w.bytes;                int length = _assetByte.Length;                //写入模型到本地                  string _name = name;                if (id != null)                {                    _name = id;                }                CreateFile(Application.persistentDataPath + "/" + _name, _assetByte, length);                Debug.Log("本地url:" + Application.persistentDataPath + "/" + _name);                //TODO:储存新version文件                CallBack(_asset);            }            if (isUnloadNow)            {                Resources.UnloadUnusedAssets();            }        }    }    /**    * path：文件创建目录    * name：文件的名称    *  info：写入的内容    */    void CreateFile(string path, byte[] info, int length)    {        //文件流信息          //StreamWriter sw;          Stream sw;        FileInfo t = new FileInfo(path);        t.Delete();        sw = t.Create();        //以行的形式写入信息          //sw.WriteLine(info);          sw.Write(info, 0, length);        //关闭流          sw.Close();        //销毁流          sw.Dispose();    }    /**   * path：文件创建目录   * name：文件的名称   *  info：写入的内容   */    void CreateTextFile(string path, string name, string info)    {        //文件流信息          StreamWriter sw;        FileInfo t = new FileInfo(path + "/" + name);        t.Delete();        sw = t.CreateText();        //以行的形式写入信息          sw.WriteLine(info);        //关闭流          sw.Close();        //销毁流          sw.Dispose();    }}

其调用方式也很简单，如下代码：

void Start(){    DownLoadCenter down = GetComponent<DownLoadCenter>();    down.Callback = OnCallback;    down.LoadAsset("资源路径"，"资源名称"，"资源类型");}private void OnCallback(string type, Object obj){    //在回调函数中编写所要执行的代码    AssetBundle ab = obj as AssetBundle;    GameObject go = ab.LoadAsset<GameObject>("预设名称");}

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