U3d动态资源加载-CFANZ编程社区

文章目录

- - U3D 动态加载资源

U3D 动态加载资源

1、Resource.load 加载资源

1.1、场景中添加3D模型

在这里插入图片描述

1.2 添加预设文件

将添加的模型文件存放到 Assets->Resources->Prefabs 目录下（没有此目录的创建目录）
在这里插入图片描述

1.3 删除场景中的模型

在这里插入图片描述

1.4 创建加载模型脚本

脚本资源存放在 Assets->Script目录下

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

public class CreateBoxScript : MonoBehaviour
{


    GameObject boxPrefab;
    Texture tex;
    // Start is called before the first frame update
    void Start()
    {
        /// 
        boxPrefab = Resources.Load<GameObject>("Prefabs/box");
        tex = Resources.Load<Texture>("Images/aaa");

        for (int i = -2; i < 3; i++) {

            for (int j = -2; j < 3; j++)
            {

                if (Mathf.Abs(i) == 2|| Mathf.Abs(j)==2) 
                {
                    Vector3  vector3 = new Vector3(i+i*0.1f, 0, j + j * 0.1f);
                    GameObject box= Instantiate(boxPrefab, vector3, Quaternion.identity);

                    box.GetComponent<MeshRenderer>().material.mainTexture = tex;

                    box.AddComponent<Rigidbody>();         
                    
                }


            }


        }
    }

    // Update is called once per frame
    void Update()
    {
        
    }
}

1.5 将脚本挂在到 Main Camera上

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1.6 运行后效果

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1.7 总结

Resource.load 方式只能加载Resources目录中的资源

2、AssetBundle 加载资源

2.1 场景中添加3D模型

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2.2 创建脚本

创建模型自动旋转的脚本，分别挂载到添加的两个模型上

一个3D模型自动旋转的脚本

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

public class FaceAnimation : MonoBehaviour
{

    float speed = 0.5f;

    // Start is called before the first frame update
    void Start()
    {
        
    }

    // Update is called once per frame
    void Update()
    {

        this.transform.Rotate(Vector3.up*speed);

    }
}

2.3 添加预设文件

将animationA 添加为预设文件，删除场景中animationA 模型文件

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2.4 创建预设文件打包脚本

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEditor;
public class CreateAssetBundle : MonoBehaviour
{


    public GameObject assetBundle;

    public GameObject assetBundlePrefab;


    /**
     *   选中文件 单独打包
     *  
     */

    [MenuItem("Custom Editor/CreateABMain")]
    static void CreateAssetBundleMain() {

        // 打包选中的游戏对象，获取到在 Asset 下选中的资源文件


        Object[] selectedAsset = Selection.GetFiltered(typeof(Object),SelectionMode.DeepAssets);



        AssetBundleBuild [] bundleMap=new AssetBundleBuild[selectedAsset.Length];   

        for (int i = 0; i < selectedAsset.Length; i++)
        {

            bundleMap[i].assetBundleName = selectedAsset[i].name;

            string sourcePath=AssetDatabase.GetAssetPath(selectedAsset[i]);

            bundleMap[i].assetNames = new string[] { sourcePath };

            if (BuildPipeline.BuildAssetBundles(Application.streamingAssetsPath,
                
                bundleMap,
                BuildAssetBundleOptions.ForceRebuildAssetBundle,
               BuildTarget.Android


                )) 
            {

                Debug.Log("打包成功");

            }
            else
            {
                Debug.Log("打包失败");

            }

        }


        AssetDatabase.Refresh();
    }

    /**
     *   选中文件 统一打一个包
     *  
     */

    [MenuItem("Custom Editor/CreateABAll")]
    static void CreateAssetBundleAll()
    { 
    
        Caching.ClearCache();

        Object[] selectedAsset = Selection.GetFiltered(typeof(Object), SelectionMode.DeepAssets);

        AssetBundleBuild[] bundleMap = new AssetBundleBuild[1];

        bundleMap[0].assetBundleName = "ALL";
        bundleMap[0].assetNames = new string[selectedAsset.Length];

        for (int i = 0; i < selectedAsset.Length; i++) 
        {
            bundleMap[0].assetNames[i]=AssetDatabase.GetAssetPath(selectedAsset[i]); 
            

        }

        if (BuildPipeline.BuildAssetBundles(Application.streamingAssetsPath,

                bundleMap,
                BuildAssetBundleOptions.ForceRebuildAssetBundle,
                BuildTarget.Android
                ))
        {

            Debug.Log("打包成功");

        }
        else
        {
            Debug.Log("打包失败");

        }

    }


}

2.4 资源打包

Assets->StreamingAssets 打包生成文件所在路径

在这里插入图片描述

点击后生成后查看 StreamingAssets 文件

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2.5 加载打包资源

在Script 文件夹下，创建脚本DecompressScript 脚本，并且挂载到 Main Camera 上

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

public class DecompressScript : MonoBehaviour
{


    public string pathUrl;
    // Start is called before the first frame update
    void Start()
    {
        // window 平台下的目录
        //pathUrl = "file://" + Application.streamingAssetsPath + "/";
        // android  平台下的目录
        pathUrl = "file://"+Application.persistentDataPath + "/";


        
    }

    // Update is called once per frame
    void Update()
    {
        
    }




    private void OnGUI()
    {
        if (GUILayout.Button("Red Asset", GUILayout.Width(200), GUILayout.Height(100))) {


            Debug.Log("Application.streamingAssetsPath::::" + pathUrl + "/prefab_red");
            //StartCoroutine(LoadSingleAssetBundle(pathUrl + "prefab_red"));
            StartCoroutine(LoadSingleAssetBundle(pathUrl + "prefab_open"));

        }

        if (GUILayout.Button("Green Asset", GUILayout.Width(200), GUILayout.Height(100)))
        {
            Debug.Log("Application.streamingAssetsPath::::" + pathUrl + "/prefab_green");
           // StartCoroutine(LoadSingleAssetBundle(pathUrl + "prefab_green"));
            StartCoroutine(LoadSingleAssetBundle(pathUrl + "prefab_close"));
        }

        if (GUILayout.Button("ALL Asset", GUILayout.Width(200), GUILayout.Height(100)))
        {

            Debug.Log("Application.streamingAssetsPath::::" + pathUrl + "/all");
            //StartCoroutine(LoadAllAssetBundle(pathUrl + "all"));
            StartCoroutine(LoadAllAssetBundle(pathUrl + "all"));
        }


        // 界面上创建按钮 更新资源
        if (GUILayout.Button("Animation Asset", GUILayout.Width(200), GUILayout.Height(100)))
        {

            Debug.Log("Application.streamingAssetsPath::::" + pathUrl + "/animationA");
            //StartCoroutine(LoadSingleAssetBundle(pathUrl + "prefab_red"));

            GameObject.Find("animation_model").SetActive(false);
            StartCoroutine(LoadSingleAssetBundle(pathUrl + "animationA"));

        }

    }



    IEnumerator LoadSingleAssetBundle(string path) { 
    
        WWW bundle=new WWW(path);
        yield return bundle;

        GameObject objPrefab = bundle.assetBundle.LoadAsset(bundle.assetBundle.name)as GameObject;

        GameObject obj
            =Instantiate(objPrefab);



    }
    IEnumerator LoadAllAssetBundle(string path)
    {


        Debug.Log("加载目录 "+ path);
        WWW bundle = new WWW(path);

        yield return bundle;

        GameObject[] assets = bundle.assetBundle.LoadAllAssets<GameObject> ();

        for (int i = 0; i < assets.Length; i++)
        {

            GameObject obj
           = Instantiate(assets[i]);

            yield return obj;

        }

    }

}

2.6 运行查看效果

2.6.1替换之前的效果

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2.6.2替换之后的效果

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2.7 Android 平台上更新

2.7.1 修改解压脚本

pathUrl = "file://"+Application.persistentDataPath + "/";

2.72 修改打包脚本

BuildTarget.Android 是android 平台

BuildTarget.StandaloneWindows 是windows平台

 if (BuildPipeline.BuildAssetBundles(Application.streamingAssetsPath,

                bundleMap,
                BuildAssetBundleOptions.ForceRebuildAssetBundle,
                BuildTarget.Android
                ))

2.7.3 android 平台的资源包放置路径

将打包好的资源放置到 Android/data/xxx.xx.xx/files/ 目录下

3、参考资料

视频资源：

https://www.bilibili.com/video/BV1rJ411G71R?p=1

文档资源：

https://blog.csdn.net/u010838555/article/details/71194939

https://blog.csdn.net/qq_35711014/article/details/89891139

文章目录

U3D 动态加载资源

1、Resource.load 加载资源

1.1、场景中添加3D模型

1.2 添加预设文件

1.3 删除场景中的模型

1.4 创建加载 模型脚本

1.5 将脚本挂在到 Main Camera上

1.6 运行后效果

1.7 总结

2、AssetBundle 加载资源

2.1 场景中添加3D模型

2.2 创建脚本

2.3 添加预设文件

2.4 创建预设文件打包脚本

2.4 资源打包

2.5 加载打包资源

2.6 运行查看效果

2.6.1替换之前的效果

2.6.2替换之后的效果

2.7 Android 平台上更新

2.7.1 修改 解压脚本

2.72 修改打包脚本

2.7.3 android 平台的 资源包放置路径

3、参考资料

1.4 创建加载模型脚本

2.7.1 修改解压脚本

2.7.3 android 平台的资源包放置路径