ResourceManager（二）—— AssetInfoManager

目录为：Assets/Scripts/ResourceManager/AssetInfoManager.cs

using System;using System.Xml;using System.IO;using System.Collections;using System.Collections.Generic;using UnityEngine;//这里其实是和打包的时候记录的xml信息对应的//AssetInfo.bytes这个文件public class AssetInfo{    public string mName;            //asset名称    public int mIndex;              //asset索引    public int mLevel;              //asset层级    public int mSize;               //assetbundle所占大小    public List<int> mDependencies = new List<int> ();  //asset关联的asset索引    //构造函数    public AssetInfo()    {        mSize = 0;    }    //解析AssetInfo信息    public void Import(XmlElement element)    {        mName = element.GetAttribute ("name");        mIndex = Int32.Parse (element.GetAttribute ("index"));        mLevel = Int32.Parse (element.GetAttribute ("level"));        //这里面其实存的是dependency的index,用逗号隔开的        //看一下AssetInfo.bytes就明白了        string depencyStr = element.GetAttribute ("depency");        if (depencyStr != "")        {            //分开            string[] depencyStrList = depencyStr.Split (',');            //访问每一个depency的index，并添加            for (int i = 0; i < depencyStrList.Length; i++)            {                int depencyIndex = Int32.Parse (depencyStrList [i]);                mDependencies.Add (depencyIndex);            }        }        mSize = Int32.Parse (element.GetAttribute ("bundlesize"));    }}//AssetInfo Managerpublic class AssetInfoManager{    //保存名称对应的AssetInfo    public Dictionary<string, AssetInfo> mNameAssetInfos = new Dictionary<string, AssetInfo>();    //保存索引对应的AssetInfo    public Dictionary<int, AssetInfo> mIndexAssetInfos = new Dictionary<int, AssetInfo>();    //上面两个Dic保存的AssetInfo是一样的，只是一个用string索引，一个用index索引    //构造函数    public AssetInfoManager()    {    }    //加载AssetInfo信息    public void LoadAssetInfo()    {        //打开文件        StreamReader sr = ResourcesManager.OpenText("AssetInfo");        XmlDocument doc = new XmlDocument ();        doc.LoadXml (sr.ReadToEnd ());        XmlElement root = doc.DocumentElement;        IEnumerator iter = root.GetEnumerator ();        //遍历每一个element        while (iter.MoveNext())        {            XmlElement child_root = iter.Current as XmlElement;            //解析AssetInfo信息            AssetInfo assetInfo = new AssetInfo ();            //导入信息            assetInfo.Import (child_root);            //保存asset信息到列表            mNameAssetInfos.Add (assetInfo.mName, assetInfo);            mIndexAssetInfos.Add (assetInfo.mIndex, assetInfo);        }        sr.Close ();    }    //根据名称获取Asset信息    public AssetInfo GetAssetInfo(string name)    {        if (mNameAssetInfos.ContainsKey(name))        {            return mNameAssetInfos [name];        }        else        {            return null;        }    }    //根据id获取Asset信息    public AssetInfo GetAssetInfo(int index)    {        if (mIndexAssetInfos.ContainsKey(index))        {            return mIndexAssetInfos [index];        }        else        {            return null;        }    }    //获取该Asset包含denpencyAsset的总大小    public int GetAllAssetSize(AssetInfo assetInfo)    {        int totalSize = 0;        foreach (int index in assetInfo.mDependencies)        {            AssetInfo info = GetAssetInfo (index);            totalSize = totalSize + info.mSize;        }        //加上本包大小        totalSize = totalSize + assetInfo.mSize;        return totalSize;    }}