代码

using System.IO;
using System.Net;
using UnityEngine;
using System.Threading;
using System.Collections;

public class ThreadTest : MonoBehaviour {

    private string[] _urls = new string[10];
    private string[] _localPath = new string[10];

   

	// Use this for initialization
	void Start () 
    {
      
        for (int i = 0; i < _urls.Length; i++)
        {
            //所有图片的下载地址
            _urls[i] = "http://192.168.1.41:8080/Test/picture/" + (i + 1).ToString() + ".jpg";
            
            //所有图片的保存路径
            _localPath[i] = Application.dataPath + "/Resources/" + (i + 1).ToString() + ".jpg";
           

            MyThread mt = new MyThread(_urls[i], _localPath[i]);
            Thread thread = new Thread(new ThreadStart(mt.DownLoadImage));
            thread.Start();
            
        }

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

    void OnGUI()
    {

    }
}

public class MyThread
{
    public string _url;
    public string _filePath;

    public MyThread(string url, string filePath)
    {
        _url = url;
        _filePath = filePath;
    }

    public void DownLoadImage()
    {
        
        WebClient web = new WebClient();
        web.DownloadFile(_url, _filePath);
    }
}