json - How to make login page in iphone using webservices -

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i'm working on app asks user login access of informations. have login.jsp file store on server , usernames , passwords on database.

on app have 2 uitextfields 1 username , 1 password. understand can use post method pass on input web server , check whether username , password match load rest of data. having trouble, can me it, how pass on inputs uitextfield web service run login.jsp script? in advance.

// jdurlconnection.h

typedef void (^successblock)(nsdictionary *dict); typedef void (^errorblock)(nsstring *error);   @interface jdurlconnection : nsobject   +(void) urlrequestwithurl:(nsstring *)urlstr               usingmethod:(nsstring *)verb             andparameters:(nsdictionary *) param           completionblock:(successblock)completed                errorblock:(errorblock)errored; @end

// jdurlconnection.m

+ (void) showmessagestring:(nsstring *)message{      uialertview * alert = [[uialertview alloc]initwithtitle:@"app name!" message:message delegate:nil cancelbuttontitle:@"ok" otherbuttontitles: nil];     [alert show];  }  #pragma mark - requestmethods  + (nsmutableurlrequest *) urlrequestfrom:(nsurl *)url verb:(nsstring *)verb parameters:(nsdictionary*)parameters{       nsmutableurlrequest *request = [nsmutableurlrequest requestwithurl:url                                                            cachepolicy:nsurlrequestreloadignoringlocalandremotecachedata                                                        timeoutinterval:30];      [request sethttpmethod:verb];      if (parameters != nil) {           nsdata *jsondata = [[nsstring stringwithformat:@"data=%@",[parameters jsonrepresentation]] datausingencoding:nsutf8stringencoding];          [request sethttpbody:jsondata];     }      return request; }    +(void) urlrequestwithurl:(nsstring *)urlstr usingmethod:(nsstring *)verb andparameters:(nsdictionary *) param completionblock:(successblock)completed errorblock:(errorblock)errored{    //  [svprogresshud showwithmasktype:svprogresshudmasktypeclear];      nsurl *url = [nsurl urlwithstring:urlstr];      nsmutableurlrequest *request = [self urlrequestfrom:url verb:verb parameters:param];      nsoperationqueue *queue = [nsoperationqueue mainqueue];      [nsurlconnection sendasynchronousrequest:request queue:queue completionhandler:^(nsurlresponse *response, nsdata *data, nserror *error) {        //  [svprogresshud dismiss];          if ([data length] > 0 && error == nil){              id responsedata = [nsjsonserialization jsonobjectwithdata:data options:nsjsonreadingmutableleaves error:nil];              nslog(@"%@",responsedata);              nsdictionary *responsedict = nil;              if ([responsedata iskindofclass:[nsdictionary class]])                 responsedict = (nsdictionary *)responsedata;              else if ([responsedata iskindofclass:[nsarray class]])                 responsedict = [nsdictionary dictionarywithobject:responsedata forkey:@"result"];              else                 responsedict = [nsdictionary dictionarywithobject:@"" forkey:@"error"];              completed(responsedict);          }         else if ([data length] == 0 && error == nil){              [self performselectoronmainthread:@selector(showmessagestring:) withobject:@"error! unable receive data server." waituntildone:yes];              errored(@"error! unable receive data server.");          }         else if (error != nil){              [self performselectoronmainthread:@selector(showmessagestring:) withobject:[error localizeddescription] waituntildone:yes];              errored([error localizeddescription]);          }     }];  }

implement as:

    nsarray *keys = [nsarray arraywithobjects:@"username",@"password", nil];     nsarray *values =  [nsarray arraywithobjects:self.tfusername.text,self.tfuserpass.text,nil];      nsdictionary *param = [nsdictionary dictionarywithobjects:values forkeys:keys];      [jdurlconnection urlrequestwithurl:[nsstring stringwithformat:@"http://yourweburl/api/user-login"] usingmethod:@"post" andparameters:param completionblock:^(nsdictionary *dict)      {           if ([dict objectforkey:@"result"]) {                   nslog(@"%@",dict);          }       }          errorblock:^(nsstring *error)      {          nslog(@"%@",error); //         errored(error);      }];

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