Unity3d外部加载音频，视频，图片等资源 及根据路径获取制定格式的文件

1.根据路径获取制定文件类型的文件：

这里写一个类，调用了打开路径的方法：
using UnityEngine;

using System;

using System.Collections.Generic;

using System.IO;

using System.Linq;

using System.Text;

public class SetPath : MonoBehaviour

{

     public static string pic;

     string path;

     void Awake ()

     {

          //设置路径，这里的路径是导出包的exe路径下//

          path=Application.dataPath+@"/../Resources";

         

          //这里新建队列，调用访问文件的方法，获取其返回的文件名队列//

          //第一个参是访问路径，第二个参是文件格式//

          List<String> list_pic=GetDirFiles(path+@"/Picture/test","*.png");

         

          foreach (string item in list_pic)

        {

               //item是文件名，获取文件名后返回完整路径//

               pic=path+@"/Picture/GiftCard/"+item.ToString()+".png";

        }

     }

    

     public List<string> GetDirFiles(string DirFullPath, string SearchPattern)

    {

        if (Directory.Exists(DirFullPath) == true)

        {

            List<string> list = new List<string>();

            //获取当前目录下指定文件类型的文件列表//

            string[] stringList = Directory.GetFiles(DirFullPath,SearchPattern);

            foreach (string str in stringList)

            {

                string fileName;

                fileName = System.IO.Path.GetFileNameWithoutExtension(str);

                list.Add(fileName);

            }

            return list;

        }

        else

        {

            return null;

        }

    }

}

2.外部加载音频
using UnityEngine;

using System.Collections;

public class Exposure_voice : MonoBehaviour {

    

     public string url_voice;

     public static AudioClip myclip;//设置静态声音资源，便于传递//

    

     void Start () {

          //外部加载声音的路径，拼接www下载文件路径//
         //注意，www加载的外部音视频都必须是ogg格式额//

          url_voice="file://"+@SetPath.pic;

    

          StartCoroutine("DownloadVoice");

     }

     IEnumerator DownloadVoice()

     {

          WWW w=new WWW(url_voice);

          yield return w;

          //将声音资源赋值为外部加载的声音即可//

          myclip=w.audioClip;

     }

}

3.外部加载视频
using UnityEngine;

using System.Collections;

public class Exposure_video : MonoBehaviour {

     public GameObject video;

     public string video_url;

    

     MovieTexture movie_tex;

     Material tex;

     AudioSource audio;

    

     float temp=0;

    

     void Start ()

     {

          video_url="file://"+@SetPath.video_name_through;

         

          StartCoroutine("VideoDownload");

          Invoke("Initial_effect",9f);

     }

    

     IEnumerator VideoDownload()

     {

          WWW www=new WWW(video_url);

          yield return www;

          movie_tex=www.movie;

          video.renderer.material.mainTexture = movie_tex;

          audio.clip=www.GetAudioClip(false,true,AudioType.OGGVORBIS);

          audio.Play();

          movie_tex.Play();

     }

}

4.外部加载图片
using UnityEngine;

using System.Collections;

public class Exposure_Pic : MonoBehaviour {

    

     public GameObject pic;

    

     public string url_pic_Discount;

    

     #region Use this for initialization

     void Start ()

     {

          url_pic_Discount="file://"+@SetPath.pic_name_gift;

         

          StartCoroutine("Pic_Download");

     }

     #endregion

    

    

     IEnumerator Pic_Download()

     {

          WWW www=new WWW(url_pic_Discount);

          yield return www;

          pic.renderer.material.mainTexture=www.texture;

     }

}

这样就可以很容易的加载外部可更换的资源，并且不需要等待长时间的导入了。。。。