AFNetworking head 怎么设置 求帮助!

POST登录后我需要保存一个字段,如下代码所示

 NSDictionary *parameters = [NSDictionary dictionaryWithObjectsAndKeys:@"zhangsan", @"loginId", @"123", @"passwd", nil];

    [manager POST:encodeUrl parameters:parameters success:^(AFHTTPRequestOperation *operation, id responseObject) {
//数据获取成功
        if ([[responseObject objectForKey:@"result"] integerValue] == 1) {
            NSArray *array = [[operation.response.allHeaderFields objectForKey:@"Set-Cookie"] componentsSeparatedByString:@";"];
            if (array.count > 0) {
                NSFileManager *fm = [NSFileManager defaultManager];
                NSArray *path = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
                NSString *filePath = [path objectAtIndex:0];
                NSString *plistPath = [filePath stringByAppendingPathComponent:@"userInfo.plist"];
                if ([fm fileExistsAtPath:plistPath]) {
                    [fm removeItemAtPath:plistPath error:nil];
                }

                [[appDelegate userInfo] setValue:[array objectAtIndex:0] forKey:@"JSESSIONID"];

                [fm createFileAtPath:plistPath contents:nil attributes:nil];
                [[appDelegate userInfo] writeToFile:plistPath atomically:YES];

                [self.navigationController popViewControllerAnimated:YES];

                //返回首页
                [appDelegate selected:0];

            }else {
                UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:nil message:@"登录失败,请重试!" delegate:nil cancelButtonTitle:@"确定" otherButtonTitles:nil];
                [alertView show];

            }

        }

    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {

    }];
    我用另一个接口获取用户信息时需要用到保存的这个字段,但是不知道怎么才能加进去,我用如下方法加入后总是提示失败
 AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
    manager.securityPolicy = [AFSecurityPolicy policyWithPinningMode:AFSSLPinningModeNone];
    manager.requestSerializer = [AFJSONRequestSerializer serializer];
    manager.responseSerializer = [AFJSONResponseSerializer serializer];
    [manager.requestSerializer setValue:@"application/json" forHTTPHeaderField:@"Accept"];
    [manager.requestSerializer setValue:@"application/json;charset=utf-8" forHTTPHeaderField:@"Content-Type"];
    [manager.requestSerializer setValue:[[appDelegate userInfo] objectForKey:@"JSESSIONID"] forHTTPHeaderField:@"Set-Cookie"];

你这个是不是涉及到网页的cookie, 你是在本地操作到webView上做操作吗