_dataDictionary = [[NSMutableDictionary alloc]initWithCapacity:0];

  AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
    manager.requestSerializer = [AFJSONRequestSerializer serializer];
    manager.responseSerializer = [AFHTTPResponseSerializer serializer];
    manager.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"text/html",@"application/json; charset=utf-8",@"text/json", @"text/plain", nil];
//    NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"%@/ordershow/frontPage.json?pageNo=1&pageSize",IP_URL]];
    [manager GET:url.absoluteString parameters:nil progress:^(NSProgress * _Nonnull downloadProgress) {
    } success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {

        NSString *str = [[NSString alloc]initWithData:responseObject encoding:NSUTF8StringEncoding];
        _dataDictionary = [[[SBJsonParser alloc] init] objectWithString:str];
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
        NSLog(@"------------ç---------- shi bai -----------------%@",error);
   
    }];
        //输出请求的数据
         NSLog(@"------------%@",_dataDictionary);