AFNetWorking发送post请求，后台接收格式不正确

Domain=com.alamofire.error.serialization.response Code=-1011 "Request failed: internal server error (500)" UserInfo={NSLocalizedDescription=Request failed: internal server error (500), NSErrorFailingURLKey=http://49.4.3.233:8081/signin, com.alamofire.serialization.response.error.data=<7b22636f 6465223a 22657272 6f722e69 6e746572 6e616c73 65727665 72222c22 6d657373 61676522 3a224261 64206372 6564656e 7469616c 73227d>, com.alamofire.serialization.response.error.response=<NSHTTPURLResponse: 0x60000003aca0> { URL: http://49.4.3.233:8081/signin } { Status Code: 500, Headers {

    "Cache-Control" =     (

        "no-cache, no-store, max-age=0, must-revalidate"

    );

    Connection =     (

        close

    );

    "Content-Type" =     (

        "application/json;charset=UTF-8"

    );

    Date =     (

        "Wed, 15 Aug 2018 09:57:07 GMT"

    );

    Expires =     (

        0

    );

    Pragma =     (

        "no-cache"

    );

    "Transfer-Encoding" =     (

        Identity

    );

    "X-Content-Type-Options" =     (

        nosniff

    );

    "X-Frame-Options" =     (

        DENY

    );

    "X-XSS-Protection" =     (

        "1; mode=block"

    );

} }}报这种错误。

     各种验证后，发现是iOS正常发送的json格式，后台不认。最后更换成原生方式发送请求，设置

request.HTTPBody字符串，解决。