出现问题界面如下图：

解决方案： 

1、在iis中选择查看网站

2、在里面右键添加网站，端口号选择8080

3、物理路径选择打包出的webgl文件

4、在webgl项目中添加web.config配置文件

如图：

先新建一个记事本文件，再改名成web.config再将这一段代码复制进去

<?xml version="1.0" encoding="utf-8"?>
<!--
  有关如何配置 ASP.NET 应用程序的详细信息，请访问
  https://go.microsoft.com/fwlink/?LinkId=169433
-->
<configuration>  
  <system.webServer>
    <httpProtocol>
      <!-- 允许跨域配置 -->
      <customHeaders>
        <add name="Access-Control-Allow-Origin" value="*" />
        <add name="Access-Control-Allow-Headers" value="X-Requested-With,Content-Type,Authorization" />
        <add name="Access-Control-Allow-Methods" value="GET, POST, PUT, DELETE,OPTIONS" />
        <add name="Access-Control-Allow-Credentials" value="true" />
      </customHeaders>
    </httpProtocol>
        <staticContent>
            <remove fileExtension=".mem" />  
            <remove fileExtension=".data" />  
            <remove fileExtension=".unity3d" />  
            <remove fileExtension=".jsbr" />  
            <remove fileExtension=".membr" />  
            <remove fileExtension=".databr" />  
            <remove fileExtension=".unity3dbr" />  
            <remove fileExtension=".jsgz" />  
            <remove fileExtension=".memgz" />  
            <remove fileExtension=".datagz" />  
            <remove fileExtension=".unity3dgz" />  
            <remove fileExtension=".json" />  
            <remove fileExtension=".unityweb" />  
           
            <mimeMap fileExtension=".mem" mimeType="application/octet-stream" />  
            <mimeMap fileExtension=".data" mimeType="application/octet-stream" />  
            <mimeMap fileExtension=".unity3d" mimeType="application/octet-stream" />  
            <mimeMap fileExtension=".jsbr" mimeType="application/octet-stream" />  
            <mimeMap fileExtension=".membr" mimeType="application/octet-stream" />  
            <mimeMap fileExtension=".databr" mimeType="application/octet-stream" />  
            <mimeMap fileExtension=".unity3dbr" mimeType="application/octet-stream" />  
            <mimeMap fileExtension=".jsgz" mimeType="application/x-javascript; charset=UTF-8" />  
            <mimeMap fileExtension=".memgz" mimeType="application/octet-stream" />  
            <mimeMap fileExtension=".datagz" mimeType="application/octet-stream" />  
            <mimeMap fileExtension=".unity3dgz" mimeType="application/octet-stream" />  
            <mimeMap fileExtension=".json" mimeType="application/json; charset=UTF-8" />  
            <mimeMap fileExtension=".unityweb" mimeType="application/octet-stream" />  
        </staticContent>
  </system.webServer>
</configuration>

然后保存重新再网页上输入127.0.0.1:8080打开浏览器即运行正常