[노마드코더: Flutter 로 웹툰 앱 만들기] #6.5 waitForWebToons

Homescreen.dart 에서 
Stateful위젯으로 변경한다. 

async 함수.......
getTodaysToon()이 종료되는 것도 기다려야 한다. 

가장 기본적인 데이터 fetching 방법을 알아봤고, 다음 시간에는 다른 방법을 보여주겠다고 한다.

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api_service.dart

import 'dart:convert';

import 'package:http/http.dart' as http;
import 'package:toonflix/models/webtoon.dart';

class ApiService {
  static const String baseUrl =
      "https://webtoon-crawler.nomadcoders.workers.dev";
  static const String today = "today";

  static Future<List<WebtoonModel>> getTodaysToon() async {
    List<WebtoonModel> webtoonInstances = [];
    final url = Uri.parse('$baseUrl/$today');
    final response = await http.get(url);
    if (response.statusCode == 200) {
      final List<dynamic> webtoons = jsonDecode(response.body);
      for (var webtoon in webtoons) {
        webtoonInstances.add(WebtoonModel.fromJson(webtoon));
      }
      return webtoonInstances;
    }
    throw Error();
  }
}

home_screen.dart

import 'package:flutter/material.dart';
import 'package:toonflix/models/webtoon.dart';
import 'package:toonflix/services/api_service.dart';

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

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

class _HomeScreenState extends State<HomeScreen> {
  List<WebtoonModel> webtoons = [];
  bool isLoading = true;

  void waitForWebtoons() async {
    webtoons = await ApiService.getTodaysToon();
    isLoading = false;
    setState(() {});
    //UI가 변경될 때 꼭 입력해야 함
  }

  @override
  void initState() {
    // TODO: implement initState
    super.initState();
    waitForWebtoons();
  }

  @override
  Widget build(BuildContext context) {
    print(webtoons);
    print(isLoading);

    return Scaffold(
      appBar: AppBar(
        centerTitle: true,
        elevation: 3,
        backgroundColor: Colors.white,
        title: const Text("Today's toon",
            style: TextStyle(
              color: Colors.black,
            )),
      ),
    );
  }
}