인프런 커뮤니티 질문&답변

에러가 생기네요 - 미세먼지앱 섹션57-19 부터 인데

에러가 생기네요 - 미세먼지앱 섹션57-19 부터 인데, 구판 섹션26-19 입니다.

수시로 에러 생기고 가끔 수십번에 1번은 데이터가 들어오는데 그것도 조금 지나면 에러 메세지가 나오네요.

첨부파일 참조

아마 오타 일건데 암만 강의하구 비교해도 오타를 찾지를 못하겠습니다.

포기하구 강의따라가도 20, 21 에서도 계속 에러 나와서 강의 포기하구 있다가 연락드립니다.

코드는 첨부 합니다.

/// component/main_app_bar.dart
///

import 'package:flutter/material.dart';
import 'package:section26_fine_dust/constant/color.dart';
import 'package:section26_fine_dust/model/stat_model.dart';
import 'package:section26_fine_dust/model/status_model.dart';

class MainAppBar extends StatelessWidget {
  final StatusModel status;
  final StatModel stat;

  MainAppBar({
    required this.status,
    required this.stat,
    super.key,
  });

  @override
  Widget build(BuildContext context) {
    final ts = TextStyle(
      color: Colors.white,
      fontSize: 30.0,
    );

    return SliverAppBar(
      backgroundColor: status.primaryColor,
      expandedHeight: 500,
      flexibleSpace: FlexibleSpaceBar(
        background: SafeArea(
          child: Container(
            margin: EdgeInsets.only(top: kToolbarHeight),
            child: Column(
              children: [
                Text(
                  '서을',
                  style: ts.copyWith(
                    fontSize: 40.0,
                    fontWeight: FontWeight.w700,
                  ),
                ),
                // const SizedBox(height: 20.0),
                Text(
                  getTimeFromDateTime(dateTime: stat.dataTime),
                  style: ts.copyWith(
                    fontSize: 20.0,
                  ),
                ),
                const SizedBox(height: 20.0),
                Image.asset(
                  status.imagePath,
                  width: MediaQuery.of(context).size.width / 2,
                ),
                const SizedBox(height: 20.0),
                Text(
                  status.label,
                  style: ts.copyWith(
                    fontSize: 40.0,
                    fontWeight: FontWeight.w700,
                  ),
                ),
                const SizedBox(height: 8.0),
                Text(
                  status.comment,
                  style: ts.copyWith(
                    fontSize: 20.0,
                    fontWeight: FontWeight.w700,
                  ),
                ),
              ],
            ),
          ),
        ),
      ),
    );
  }

  String getTimeFromDateTime({required DateTime dateTime}) {
    return '${dateTime.year} ${dateTime.month} ${dateTime.day} ${dateTime.hour} ${dateTime.minute}';
  }

  String getTimeFormat(int number) {
    return number.toString().padLeft(2, '0');
  }
}

/// screen/home_screen.dart
///

import 'package:dio/dio.dart';
import 'package:flutter/material.dart';
import 'package:section26_fine_dust/component/card_title.dart';
import 'package:section26_fine_dust/component/category_card.dart';
import 'package:section26_fine_dust/component/hourly_card.dart';
import 'package:section26_fine_dust/component/main_app_bar.dart';
import 'package:section26_fine_dust/component/main_card.dart';
import 'package:section26_fine_dust/component/main_drawer.dart';
import 'package:section26_fine_dust/component/main_state.dart';
import 'package:section26_fine_dust/constant/color.dart';
import 'package:section26_fine_dust/constant/status_level.dart';
import 'package:section26_fine_dust/model/stat_model.dart';
import 'package:section26_fine_dust/repository/stat_repository.dart';

import '../constant/data.dart';

class HomeScreen extends StatefulWidget {
  const HomeScreen({super.key});

  @override
  State<HomeScreen> createState() => _HomeScreenState();
}

class _HomeScreenState extends State<HomeScreen> {
  Future<List<StatModel>> fetchData() async {
    final statModels = await StatRepository.fetchData();

    print(statModels);
    return statModels;
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: primaryColor,
      drawer: MainDrawer(),
      body: FutureBuilder<List<StatModel>>(
        future: fetchData(),
        builder: (context, snapshot) {
          if (snapshot.hasError) {
            // 에러가 있을때
            return Center(
              child: Text('에러가 있습니다.'),
            );
          }

          if (!snapshot.hasData) {
            // 로딩 상태
            return Center(
              child: CircularProgressIndicator(),
            );
          }

          List<StatModel> stats = snapshot.data!;
          StatModel recentStat = stats[0];

          // 1 - 5, 6 - 10, 11 - 15
          // 7
          final status = statusLevel
              .where(
                (element) => element.minFineDust < recentStat.seoul,
              )
              .last;

          return CustomScrollView(
            slivers: [
              MainAppBar(
                stat: recentStat,
                status: status,
              ),
              SliverToBoxAdapter(
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.stretch,
                  children: [
                    CategoryCard(),
                    const SizedBox(height: 16.0),
                    HourlyCard(),
                  ],
                ),
              ),
            ],
          );
        },
      ),
    );
  }
}