网络请求 cookie的添加

        NSURL *url = [NSURLURLWithString:str];

        NSMutableURLRequest *request = [NSMutableURLRequestrequestWithURL:url];

        [request setHTTPMethod:@"POST"];

        NSURLSessionConfiguration *sessionConfiguration = [NSURLSessionConfigurationdefaultSessionConfiguration];

            NSURLSession *session = [NSURLSessionsessionWithConfiguration:sessionConfiguration];

        NSURLSessionDataTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData *_Nullable data, NSURLResponse *_Nullable response, NSError * _Nullable error) {

            NSDictionary *dictionary = [NSJSONSerializationJSONObjectWithData:data options:NSJSONReadingMutableContainerserror:nil];

            NSLog(@"%@",dictionary);

        }];

        [task resume];