/// 
        /// 异步下下载静态资源        /// 
        ///         /// 
             IEnumerator DownloadFile(string url)        {            bool done = false;            using (var client = new WebClient())            {                client.DownloadStringCompleted += (s, e) =>                {                    done = true;                    results.Add(e.Result);                };                client.DownloadStringAsync(new Uri(url));            }            while (!done)                yield return null;        }

这里的 results 是一个List<string>

用协程批量执行

IEnumerator DownloadAllAtOnce()        {            //Start multiple async downloads and store their handles            var downloads = new List
     
      ();            downloads.Add(runner.Run(DownloadFile("http://localhost:1323/static/v3.0.0/1106-1.sql")));            downloads.Add(runner.Run(DownloadFile("http://localhost:1323/static/v3.0.0/1106-2.sql")));            //Wait until all downloads are done            while (downloads.Count > 0)            {                yield return null;                for (int i = 0; i < downloads.Count; ++i)                    if (!downloads[i].IsRunning)                        downloads.RemoveAt(i--);            }        }
     

 

协程

CoroutineRunner runner = new CoroutineRunner();        const float updateRate = 1f / 30f;        public void Run2()        {            var run = runner.Run(DownloadAllAtOnce());            while (run.IsRunning)            {                runner.Update(updateRate);            }        }

CoroutineRunner 和 CoroutineHandle 参考

https://github.com/ChevyRay/Coroutines