iOS 原生网络请求写法

//网络请求
    NSURLSession * mySession = [NSURLSessionsharedSession];
    NSURL * fullURL = [NSURLURLWithString:[NSStringstringWithFormat:@"%@/%@",host,shoplisturl]];
    NSMutableURLRequest * request = [NSMutableURLRequestrequestWithURL:fullURLcachePolicy:NSURLRequestUseProtocolCachePolicytimeoutInterval:7.0];
    request.HTTPMethod= @"POST";
    [request addValue:@"application/x-www-form-urlencoded"forHTTPHeaderField:@"Content-Type"];
    NSString * paramStr = [NSStringstringWithFormat:@"cate_id=%@&business=%@&p=%@&sort=%@&num=%@&recommend=%@&keyword=%@&lng_lat=%@&uid=%@&token=%@",cateID,businessID,page,sort,num,recommend,keyword,lng_lat,userID,token];
    request.HTTPBody= [paramStr dataUsingEncoding:NSUTF8StringEncoding];
    NSURLSessionDataTask * task = [mySessiondataTaskWithRequest:requestcompletionHandler:^(NSData* _Nullable data,NSURLResponse* _Nullable response,NSError* _Nullable error) {
        //判断接口是否成功返回
        if (error) {
            //接口访问失败
            NSLog(@"error:%@",error.localizedDescription);
            NSLog(@"%s",__func__);
           
            NSInteger status =0;
           
            if (callback) {
                callback(status, @"网络不给力");
            }
        }else
        {
            //接口访问成功
            //JSON解析
            NSError * parseError1 =nil;
            NSDictionary * dic = [NSJSONSerializationJSONObjectWithData:dataoptions:NSJSONReadingMutableContainerserror:&parseError1];
            if (parseError1) {
                NSLog(@"JSON解析错误");
                return;
            }
            NSLog(@"data:%@", dic);
           
            NSArray *dataArray = [dicobjectForKey:@"info"];
            NSInteger status = [[dicobjectForKey:@"status"]integerValue];
            if (status == 1) {
                if (callback) {
                    dispatch_async(dispatch_get_main_queue(), ^{
                        callback(status,dataArray);
                    });
                }
            }else{
//                [self showHUDInWindowJustWithText:[dic objectForKey:@"info"] disMissAfterDelay:1.0];
               
                if (callback) {
                    dispatch_async(dispatch_get_main_queue(), ^{
                        callback(status, nil);
                    });
                }
            }
        }
       
    }];

    [task resume];