How can i fix “Error Domain=NSCocoaErrorDomain Code=3840 ”No value.“ UserInfo={NSDebugDescription=No value.}”

Question

When i run my code i get this error and i don\'t know why.

Error Domain=NSCocoaErrorDomain Code=3840 \"No value.\" UserInfo={NSDebugDescription=No value.}

I

Answer 1

You need to set the content-type header value to use JSON.

request.addValue("application/json", forHTTPHeaderField: "Content-Type")

Updated the code to Swift 3 and removed everything unrelated to the request:

let myUrl = URL(string: "http://foodhelper.club/registerUser.php");
var request = URLRequest(url:myUrl!);
request.httpMethod = "POST";
request.addValue("application/json", forHTTPHeaderField: "Content-Type")

let postString = "userEmail=email&userFirstName=firstname&userLastName=lastname&userPassword=password";
request.httpBody = postString.data(using: String.Encoding.utf8);

URLSession.shared.dataTask(with: request, completionHandler: { (data:Data?, response:URLResponse?, error:Error?) -> Void in
        if error != nil {
            print("fail")
            return
        }

        do {
            let json = try JSONSerialization.jsonObject(with: data!, options: .mutableContainers) as? NSDictionary
            print ("1")

            if let parseJSON = json {

                let userId = parseJSON["userId"] as? String
                print ("2")
                if( userId != nil) {

                } else {
                    let errorMessage = parseJSON["message"] as? String
                    print ("3")
                }
            }
        } catch{
            print(error)
        }
}).resume()