最近被一個問題困擾了好久，連續三天都一直在想辦法解決，各種能參考的資料都看了，包括硬著頭皮看全英文的官網，努力尋求解決辦法，昨晚搞到凌晨深夜兩點可還是失望的離開了辦公室，到底是什麼問題呢？我相信如果Unity3D做網路遊戲或者動態載入資源的同志們都會碰到，那就是Unity3d動態載入資源然後切換到web平臺會報錯，關於security的一個錯誤，官方的解釋是：http://docs.unity3d.com/Documentation/Manual/SecuritySandbox.html，努力看看英文吧，相信會有幫助！

目的：為了Unity3D能動態載入模型資源，切換到web平臺也能正常載入到場景中！

步驟：

Unity3D程式碼：

using UnityEngine;
using System.Collections;
using System.Text;

public class NewBehaviourScript : MonoBehaviour
{

    string s;
    private GameObject obj;
    private WWW www;
    private string url = @"http://192.168.1.6/plusFile/Test.aspx";
    private string url1 = "http://114.92.247.6/xiaowei/ok.unity3d";

    void Start()
    {

    }

    void OnGUI()
    {
        if (GUI.Button(new Rect(20, 20, 100, 40), "載入"))
        {
            StartCoroutine(getURL(url));
            print("2");
        }
    }

    IEnumerator getURL(string url)
    {
        print("3");
        WWW web = new WWW(url);
        yield return web;
		
        Encoding e1 = new ASCIIEncoding();
        this.s = e1.GetString(web.bytes);
        print("web : " + this.s);
        print("--"+web.bytes.Length);
        
		//擷取伺服器端有用的資料
		print("s:length"+s.Length+"url1:length:"+url1.Length);
        //this.s = web.text;
		this.s = s.Substring(0,38);
		print(s.Length);
        StartCoroutine(getModel(s));
        print(url1+"|"+this.s);
        print(this.s.Length);
    }


    IEnumerator getModel(string str)
    {
        print(str.Length);
        this.www = new WWW(str);

        yield return this.www;
        print(www.bytes.Length);
        obj = GameObject.Instantiate(www.assetBundle.mainAsset) as GameObject;
        obj.transform.position = new Vector3(0, 1, 20);
        print(www.bytes.Length);
    }
}
 

<?xml version="1.0"?>
<!DOCTYPE cross-domain-policy SYSTEM "http://www.macromedia.com/xml/dtds/cross-domain-policy.dtd">  
<cross-domain-policy>
<allow-access-from domain="*" to-ports="*"/>
</cross-domain-policy>