我无法在TabBarView中进行搜索和过滤，我try 过这样
import 'dart:async';
import 'dart:developer';
import 'package:aliseo_app/models/web_scrapping.dart';
import 'package:aliseo_app/variables/global_variables.dart';
import 'package:flutter/material.dart';
import '../widgets/image_container.dart';
dynamic article;
class HomeScreen extends StatefulWidget {
const HomeScreen({super.key});
static const routeName = '/home';
@override
State<HomeScreen> createState() => _HomeScreenState();
}
class _HomeScreenState extends State<HomeScreen> {
TextEditingController searchController = TextEditingController();
int selectIndex = 0;
String searchQuery = '';
void updateSearchQuery(String query) {
final suggestion = article.where((art){
final articlesTitle = art.title.toLowerCase();
final input = query.toLowerCase();
return articlesTitle.contains(input);
}).toList();
setState(() => article = suggestion);
}
Future newsControl() async {
await getData();
setState(() {});
}
@override
void initState() {
newsControl();
super.initState();
}
@override
Widget build(BuildContext context) {
List<String> tabs = ['Esteri', 'Politica', 'Economia', 'Cultura'];
return DefaultTabController(
initialIndex: 0,
length: tabs.length,
child: Scaffold(
backgroundColor: const Color(0xffEEE2DE),
appBar: AppBar(
backgroundColor: Colors.transparent,
elevation: 0,
leading: IconButton(
onPressed: () {},
icon: const Icon(
Icons.menu,
color: Colors.white,
)),
),
extendBodyBehindAppBar: true,
//bottomNavigationBar: const BottomNavBar(
// index: 0,
//),
body: ListView(
padding: EdgeInsets.zero,
children: [
const _TitleScreen(),
Padding(
padding: const EdgeInsets.all(8.0),
child: SizedBox(
height: MediaQuery.of(context).size.height * 0.06,
child: TextFormField(
onChanged: updateSearchQuery,
controller: searchController,
decoration: InputDecoration(
enabled: true,
hintText: 'Cerca',
fillColor: const Color(0xffEA906C),
filled: true,
prefixIcon: const Icon(
Icons.search,
color: Colors.black,
),
suffixIcon: const RotatedBox(
quarterTurns: 1,
//child: Icon(
// Icons.tune,
// color: Colors.grey,
//)
),
border: OutlineInputBorder(
borderRadius: BorderRadius.circular(20),
borderSide: BorderSide.none)),
),
),
),
Column(
children: [
TabBar(
tabAlignment: TabAlignment.start,
labelPadding: const EdgeInsets.only(right: 10),
dividerColor: Colors.transparent,
indicatorSize: TabBarIndicatorSize.label,
isScrollable: true,
indicatorColor: const Color(0xff000f24),
tabs: tabs
.map((tab) => SizedBox(
width: 110,
child: Tab(
icon: Text(
tab,
style: Theme.of(context)
.textTheme
.headlineSmall!
.copyWith(fontWeight: FontWeight.bold),
),
),
))
.toList()),
SizedBox(
height: MediaQuery.of(context).size.height * 0.60,
child: TabBarView(
children: tabs
.map(
(tab) => ListView.builder(
padding: EdgeInsets.zero,
shrinkWrap: true,
itemCount: articles[tab]!.length,
itemBuilder: ((context, index) {
final article = articles[tab]![index];
return Row(
children: [
ImageContainer(
width: MediaQuery.of(context).size.width*0.40,
height: 100,
imageUrl: article.imageUrl,
margin: const EdgeInsets.all(10.0),
borderRadius: 5,
),
Expanded(
child: Column(
crossAxisAlignment:
CrossAxisAlignment.start,
children: [
Text(
article.title,
maxLines: null,
overflow: TextOverflow.clip,
style: Theme.of(context)
.textTheme
.titleSmall!
.copyWith(
fontWeight:
FontWeight.bold),
),
Text(
article.createdAt,
maxLines: 2,
overflow: TextOverflow.clip,
style: Theme.of(context)
.textTheme
.bodySmall!,
),
],
),
),
],
);
})),
)
.toList()),
),
],
),
],
),
));
}
}
class _TitleScreen extends StatelessWidget {
const _TitleScreen({
super.key,
});
@override
Widget build(BuildContext context) {
return Container(
decoration: const BoxDecoration(
borderRadius: BorderRadius.only(
bottomLeft: Radius.circular(20),
bottomRight: Radius.circular(20)),
color: Color(0xff000f24)),
child: Padding(
padding: const EdgeInsets.all(20.0),
child: ImageContainer(
height: MediaQuery.of(context).size.height * 0.19,
width: MediaQuery.of(context).size.width,
padding: const EdgeInsets.all(20.0),
imageUrl:
'https://aliseoeditoriale.it/wp-content/uploads/2022/06/logo-aliseo-footer.png',
),
),
);
}
}
当我在搜索框中搜索时，屏幕以正确的方式重新加载，但我仍然看到所有的文章好像什么都没有发生，我try 在线搜索，但找不到一种方法.文章是一个全局变量，是一个以字符串为键、以文章数组为值的映射
Map<String, List<Article>> articles = {
'Esteri': foreignArticles,
'Politica': politicsArticles,
'Economia': economicsArticles,
'Cultura': cultureArticles,};
你们能帮我弄清楚吗？