ios - Is there need for mapping in Swift -

i'm beginner swift coding, , i'm trying send post request json. there need use objectmapper convert model object mapping objects json, or enough use next code:

    @ibaction func submitaction(sender: anyobject) {          //declare parameter dictionary contains string key , value combination.         var parameters = ["name": nametextfield.text, "password": passwordtextfield.text] dictionary<string, string>          //create url nsurl          let url = nsurl(string: "http://myservername.com/api") //change url          //create session object          var session = nsurlsession.sharedsession()          //now create nsmutablerequest object using url object         let request = nsmutableurlrequest(url: url!)          request.httpmethod = "post" //set http method post          var err: nserror?         request.httpbody = nsjsonserialization.datawithjsonobject(parameters, options: nil, error: &err) // pass dictionary nsdata object , set request body          request.addvalue("application/json", forhttpheaderfield: "content-type")         request.addvalue("application/json", forhttpheaderfield: "accept")          //create datatask using session object send data server         var task = session.datataskwithrequest(request, completionhandler: {data, response, error -> void in             println("response: \(response)")             var strdata = nsstring(data: data, encoding: nsutf8stringencoding)             println("body: \(strdata)")             var err: nserror?             var json = nsjsonserialization.jsonobjectwithdata(data, options: .mutableleaves, error: &err) as? nsdictionary              // did jsonobjectwithdata constructor return error? if so, log error console             if(err != nil) {                 println(err!.localizeddescription)                 let jsonstr = nsstring(data: data, encoding: nsutf8stringencoding)                 println("error not parse json: '\(jsonstr)'")             }             else {                 // jsonobjectwithdata constructor didn't return error. but, should still                 // check , make sure json has value using optional binding.                 if let parsejson = json {                     // okay, parsedjson here, let's value 'success' out of                     var success = parsejson["success"] as? int                     println("succes: \(success)")                 }                 else {                     // woa, okay json object nil, went worng. maybe server isn't running?                     let jsonstr = nsstring(data: data, encoding: nsutf8stringencoding)                     println("error not parse json: \(jsonstr)")                 }             }         })          task.resume() } 

and easier way , less complicated?