利用AFN3.0进行网络请求,要发送的参数在一个数组里,每次取数组中的一条数据设置参数发送请求,

我通过for循环遍历数组并设置参数发送请求,将网络请求返回的数据添加到一个新的数组中,

发现不是每次请求返回的数据的顺序是一样的,功能需求返回数据的排序必须跟发送请求的顺序是一样的,

求问有什么方法保证前一次请求返回数据之后再发送下一次请求?

非常感谢,万分感谢!!!!

/**
 *  加载订单数据,设置控件位置
 */
- (void)loadOrderData {
        NSString *userID = [[NSUserDefaults standardUserDefaults] stringForKey:@"GOId"];
        NSDictionary *dict = @{
                               @"GOId" : userID,
                               };
        // 将字典转为json
        NSDictionary *params = [ELHOCToJson ocToJson:dict];
        
        NSString *URL = [NSString stringWithFormat:@"%@RealtimeOrder_getROListCon12345.action", ELHBaseURL];
        
        
        __weak typeof(self) weakSelf = self;
        [self.manager POST:URL parameters:params progress:nil success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
            
            weakSelf.ELHOrderArray = [ELHOrderModel mj_objectArrayWithKeyValuesArray:responseObject];
            

            
            // 获取订单编号
            for (int i = 0; i < weakSelf.ELHOrderArray.count; i++) {
                ELHOrderModel *model = weakSelf.ELHOrderArray[i];
                
                [weakSelf.ELHOrderNumArray addObject:model.ROBM];
                
            }
            

            // 根据获取到的订单编号加载订单详情列表
            if (weakSelf.ELHOrderNumArray != nil) {
                dispatch_queue_t conCurrentQueue = dispatch_queue_create("order", NULL);
                for (NSString *ROBM in weakSelf.ELHOrderNumArray) {
                    dispatch_barrier_async(conCurrentQueue, ^{
                        // 加载订单详情列表
                        [self loadOrderDetailData:ROBM];
                    });
                }
            }
            
            
       
            
            // 刷新数据
            [orderVC.tableView reloadData];
            
        } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
            NSLog(@"%@", error);
        }];
    
}



/**
 *   加载订单详情列表
 */
- (void)loadOrderDetailData:(NSString *)ROBM {
    NSDictionary *dict = @{
                           @"ROBM" : ROBM,
                           };
    
    // 字典转json
    NSDictionary *params = [ELHOCToJson ocToJson:dict];
    
    NSString *URL = [NSString stringWithFormat:@"%@OrderPrice_getOPListByROBM.action", ELHBaseURL];
    
    __weak typeof(self) weakSelf = self;
    [self.manager POST:URL parameters:params progress:nil success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {       
    
        // 将获取到的订单详情数据逐个添加到数组中
        [weakSelf.ELHOrderDetailArray addObject:[ELHOrderDetailModel mj_objectArrayWithKeyValuesArray:responseObject]];
        ELHOrderTableViewController *orderVC = weakSelf.childViewControllers.firstObject;
        
        orderVC.orderDetailArray = weakSelf.ELHOrderDetailArray;
        
        // 刷新数据
        [orderVC.tableView reloadData];
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
        NSLog(@"%@", error);
    }];
}