[游戏开发]获取文件方式

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System.IO;
using UnityEngine.Networking;

public class LoadAB : MonoBehaviour {

	// Use this for initialization
	void Start () {
        //  LoadFile();
        StartCoroutine(LoadWeb());
	}
    IEnumerator LoadWeb()
    {
        string uri = "file:///" + Application.dataPath + "/StreamingAssets/mainpanel";
        UnityWebRequest request = UnityWebRequest.GetAssetBundle(uri);
        yield return request.Send();
        AssetBundle ab = DownloadHandlerAssetBundle.GetContent(request);
        GameObject go = ab.LoadAsset<GameObject>("22");//22：预设体的名称
        GameObject g = Instantiate(go);
        g.transform.SetParent(GameObject.Find("Canvas").transform, false);
    }
    // Update is called once per frame
    void LoadFile()
    {
        //加载本地文件
        AssetBundle ab = AssetBundle.LoadFromFile(Path.Combine(Application.streamingAssetsPath, "mainpanel"));//mainpanel包的名字
        GameObject go = ab.LoadAsset<GameObject>("22");//22：预设体的名称
        GameObject g = Instantiate(go);
        g.transform.SetParent(GameObject.Find("Canvas").transform, false);
	}
}

1.AssetBundle.LoadFromFile：从本地加载，速度最快。

如果是未压缩或者LZ4压缩的，从本地直接读取。

如果是LZMA压缩的，先解压缩包，然后加载到内存中。

2.UnityWebRequest的DownloadHandlerAssetBundle