add_header 'Access-Control-Allow-Origin' '*' always;
    add_header 'Access-Control-Allow-Credentials' 'true';
    add_header 'Access-Control-Allow-Methods' 'GET, POST, PATCH, DELETE, PUT, OPTIONS';
	add_header 'Access-Control-Allow-Headers' 'DNT,X-Mx-ReqToken,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type, X-Custom-Header, Access-Control-Expose-Headers, Token, Authorization';
	add_header 'Access-Control-Allow-Headers'  '*';
    add_header 'Access-Control-Max-Age' 1728000;

前后端都可以！