Unity 简单实现资源管理类加载AssetBundle
基于Unity用C#语言编写一个资源管理类，要求如下：
使用协程加载加载AssetBundle，支持优先级队列，尽量考虑加载新能。
设置打包编辑器：
#if UNITY_EDITOR
using UnityEngine;
using UnityEditor;
using System.Collections;
using System.IO;
public class AssetBundle
{
//编辑器扩展，在菜单栏Assets下生成Build AssetBundles菜单
[MenuItem("Assets/Build AssetBundles")]
//进行资源打包
static void BuildAllAssetBundles()
{
//打包之前要保证文件夹存在，不存在的话会报错
//使用相对路径保存
string dir = "AssetBundle";
if (Directory.Exists(dir) == false)
{
Directory.CreateDirectory(dir);
}
//BuildPipeline是UnityEditor中用于打包的类，其中的BuildAssetBundle用于AssetBundle打包
//dir:存储的路径
//BuildAssetBundleOptions:表示压缩式的算法 None为LZMA算法
//BuildTarget: 表示用于什么平台
BuildPipeline.BuildAssetBundles(dir, BuildAssetBundleOptions.None, BuildTarget.StandaloneWindows64);
Debug.Log("打包成功！");
}
}
#endif
第一种实现方式：
using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Networking; //UnityWebRequest
using UnityEngine.UI;
public class RS : MonoBehaviour //资源管理类，进行资源优先级排序并进行资源加载
{
/*
//UnityWebRequest加载测试实例，用来检测一开始是否加载成功
IEnumerator Start()
{//使用UnityWebRequest
string uri = @"http://localhost:56000/AssetBundle/image1.unity3d"; //获取请求,注意端口号
UnityWebRequest request = UnityWebRequest.GetAssetBundle(uri);
yield return request.SendWebRequest(); //等待请求发送完
Debug.Log(request);
//DownloadHandlerAssetBundle.GetContent(request); 注意，此时仅仅是取得ab对象
//AssetBundle ab = (request.downloadHandler as DownloadHandlerAssetBundle).assetBundle;
UnityEngine.AssetBundle ab = DownloadHandlerAssetBundle.GetContent(request);
Debug.Log(ab);
if (ab != null)
{
Debug.Log(ab + "ab success"); //输出结果：1.unity success --测试加载成功
}
else
{
Debug.Log(ab + "ab not success");
}
}
*/
public enum LoadLevel //定义加载优先级枚举
{
LOW = 1,
HIGHT = 2
}
//在Inspection设置对应的变量属性
//保存panel中对应的image对象
public GameObject[] image;
private int imageIndex = 0;
//传入对应image的资源名，注意保持资源名和包名一致
public string[] resName;
//传入对应image的资源优先级
public LoadLevel[] resLevel;
//加载服务器资源的路径
private string url = @"http://localhost:50949/AssetBundle/";
//协程对象，控制只有一个协程运行
private Coroutine load;
//高优先级队列与低优先级队列，不需要用List泛型
ArrayList hightList = new ArrayList();
ArrayList lowList = new ArrayList();
public void LoadList(string resname, LoadLevel level) //队列处理函数
{
//进行对应优先级队列
if ((int)level == 2)
{
hightList.Add(resname);
}
else
{
lowList.Add(resname);
}
}
IEnumerator LoadRes() //定义一个调用协程
{
string resname = "";
int i = 1;
while (hightList.Count + lowList.Count != 0) //在每一帧中使用协程从队列中获取图片并打印信息
{
if (hightList.Count != 0)
{
resname = (string)hightList[0];
hightList.RemoveAt(0);
}
else if (lowList.Count != 0)
{
resname = (string)lowList[0];
lowList.RemoveAt(0);
}
//使用UnityWebRequest
UnityWebRequest request = UnityWebRequest.GetAssetBundle(url + resname + ".unity3d");
//等待请求发送完
yield return request.SendWebRequest();
Debug.Log(request);
//加载Ab包
UnityEngine.AssetBundle ab = DownloadHandlerAssetBundle.GetContent(request);
//if (ab != null)
//Debug.Log(ab);
//加载图片资源
Sprite resource = ab.LoadAsset(resname);
//Debug.Log(resource);
//引用资源
image[imageIndex].GetComponent().sprite = resource;
imageIndex++;
//清理AB包
ab.Unload(false);
//协程置空
load = null;
Debug.Log("第" + i + "帧");
Debug.Log("load res succeed:" + resname);
//分帧加载，每一帧提取5条数据
if (imageIndex % 5 == 0)
{
yield return null; //在下一帧执行
i++;
Debug.Log("分帧加载停顿处");
}
}
}
// Use this for initialization
void Start()
{
for (int i = 0; i < resName.Length; i++) //初始化优先级队列的数据
{
LoadList(resName[i], resLevel[i]);
}
//开始协程进行加载，在协程内进行分帧加载
StartCoroutine(LoadRes());
}
// Update is called once per frame
void Update()
{
}
}
第二种实现方式：
using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Networking; //UnityWebRequest
using UnityEngine.UI;
public class RS : MonoBehaviour //资源管理类，进行资源优先级排序并进行资源加载
{
/*
//UnityWebRequest加载测试实例，用来检测一开始是否加载成功
IEnumerator Start()
{//使用UnityWebRequest
string uri = @"http://localhost:56000/AssetBundle/image1.unity3d"; //获取请求,注意端口号
UnityWebRequest request = UnityWebRequest.GetAssetBundle(uri);
yield return request.SendWebRequest(); //等待请求发送完
Debug.Log(request);
//DownloadHandlerAssetBundle.GetContent(request); 注意，此时仅仅是取得ab对象
//AssetBundle ab = (request.downloadHandler as DownloadHandlerAssetBundle).assetBundle;
UnityEngine.AssetBundle ab = DownloadHandlerAssetBundle.GetContent(request);
Debug.Log(ab);
if (ab != null)
{
Debug.Log(ab + "ab success"); //输出结果：1.unity success --测试加载成功
}
else
{
Debug.Log(ab + "ab not success");
}
}
*/
public enum LoadLevel //定义加载优先级枚举
{
LOW = 1,
HIGHT = 2
}
//在Inspection设置对应的变量属性
//保存panel中对应的image对象
public GameObject[] image;
private int imageIndex = 0;
//传入对应image的资源名，注意保持资源名和包名一致
public string[] resName;
//传入对应image的资源优先级
public LoadLevel[] resLevel;
//加载服务器资源的路径
private string url = @"http://localhost:56000/AssetBundle/";
//协程对象，控制只有一个协程运行
private Coroutine load;
//高优先级队列与低优先级队列，不需要用List泛型
ArrayList hightList = new ArrayList();
ArrayList lowList = new ArrayList();
public void LoadList(string resname, LoadLevel level) //队列处理函数
{
//进行对应优先级队列
if ((int)level == 2)
{
hightList.Add(resname);
}
else
{
lowList.Add(resname);
}
}
IEnumerator LoadRes(string resname) //定义一个调用协程，根据传入的名称进行相应资源的加载
{
Debug.Log(resname);
//使用UnityWebRequest
UnityWebRequest request = UnityWebRequest.GetAssetBundle(url + resname + ".unity3d");
//等待请求发送完
yield return request.SendWebRequest();
Debug.Log(request);
//加载Ab包
UnityEngine.AssetBundle ab = DownloadHandlerAssetBundle.GetContent(request);
//if (ab != null)
//Debug.Log(ab);
//加载图片资源
Sprite resource = ab.LoadAsset(resname);
//Debug.Log(resource);
//引用资源
image[imageIndex].GetComponent().sprite = resource;
imageIndex++;
//清理AB包
ab.Unload(false);
//协程置空
load = null;
Debug.Log("load res succeed:" + resname);
}
// Use this for initialization
void Start()
{
for (int i = 0; i < resName.Length; i++) //初始化优先级队列的数据
{
LoadList(resName[i], resLevel[i]);
}
}
// Update is called once per frame
void Update()
{
if (hightList.Count + lowList.Count != 0) //在每一帧中使用协程根据队列进行图片加载和信息打印
{
if (load == null) //当协程未运行时,启动协程进行加载，当协程运行时，说明正在加载图片
{
if (hightList.Count != 0)
{
load = StartCoroutine("LoadRes", (string)hightList[0]);
hightList.RemoveAt(0);
}
else if (lowList.Count != 0)
{
load = StartCoroutine("LoadRes", (string)lowList[0]);
lowList.RemoveAt(0);
}
}
}
}
}
具体项目如下所示：
需要的可以自行下载：https://download.csdn.net/download/a834595603/11232570