网络请求 cookie的添加

        NSURL *url = [NSURL
URLWithString:str];

        NSMutableURLRequest *request = [NSMutableURLRequest
requestWithURL:url];

        [request setHTTPMethod:@"POST"];

        NSURLSessionConfiguration *sessionConfiguration = [NSURLSessionConfiguration
defaultSessionConfiguration];

            NSURLSession *session = [NSURLSession
sessionWithConfiguration:sessionConfiguration];

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

            NSDictionary *dictionary = [NSJSONSerialization
JSONObjectWithData:data options:NSJSONReadingMutableContainers
error:nil];

            NSLog(@"%@",dictionary);

        }];

        [task resume];