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[英]Call void with SetState method under stateful widget class from another dart file in Flutter
[英]How can I import other dart file to stateful widget in flutter?
我是撲撲的新手並試圖學習它。
我在 lib 中有 main.dart,lib>ui>screens 中有 HomePage.dart,lib>ui>widgets 中有 Widgets.dart。 我將 HomePage.dart 導入到 main.dart,我想要的是將 Widgets.dart 導入到 HomePage.dart。
HomePage.dart 包含有狀態的小部件,而 Widgets.dart 包含一些小部件和一個有狀態的類。
下面是部分代碼。
///main.dart//
import 'package:flutter/material.dart';
import 'ui/screens/HomePage.dart';
import 'ui/screens/AnalysisPage.dart';
void main(){
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'covid-19',
initialRoute: '/',
routes: {
'/': (context) => HomePage(),
'/analysis': (context) => AnalysisPage(),
//'/news': (context) => NewsPage(),
//'/more': (context) => MorePage(),
},
//home: HomePage(),
);
}
}
///HomePage.dart//
import 'package:flutter/material.dart';
import 'package:flutter/services.dart' show rootBundle;
import 'package:covid_app/ui/widgets/Widgets.dart';
class HomePage extends StatefulWidget {
@override
_HomePageState createState() => _HomePageState();
}
class _HomePageState extends State<HomePage> {
String data = '';
fetchFileData() async {
String responseText;
responseText = await rootBundle.loadString('lib/assets/number.txt');
setState(() {
data = responseText;
});
}
@override
void initState() {
fetchFileData();
super.initState();
}
@override
Widget build(BuildContext context){
final Size size= MediaQuery.of(context).size;
List<String> number = data.split(' ');
return Scaffold(...)
///Widgets.dart//
import 'package:flutter/material.dart';
Widget _drawer(BuildContext context){
return Drawer(...)
//More widgets in this file, but I'll skip it.
class ClassificationCircle extends StatefulWidget {
@override
_ClassificationCircleState createState() => _ClassificationCircleState();
}
class _ClassificationCircleState extends State<ClassificationCircle> {
@override
Widget build(BuildContext context) {
return Scaffold(...)
感謝您的閱讀,我會等待您的建議!
從小部件名稱的開頭刪除“_”
如果您在小部件名稱之前附加“_”,您的小部件將作為私有。
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