解决ajax跨区域访问报错问题

Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource

解决办法：

安装nginx，更改nginx.conf文件，加入代码

location /你的二级目录 {
            #proxy_set_header Host $host:80;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_pass   这里输入你的网址;
}