目次
Outline
TextFieldの値を変更したい
TextEditingControllerにsetStateで値をセットすればいける。
import 'package:flutter/material.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData.dark(),
home: const MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({Key? key, required this.title}) : super(key: key);
final String title;
@override
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
final val1Controller = TextEditingController();
final val2Controller = TextEditingController();
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Column(
children: [
Row(
children: [
Flexible(
child: TextField(
controller: val1Controller,
),
),
Flexible(
child: TextField(
controller: val2Controller,
),
),
ElevatedButton(
child: Text('Button'),
onPressed: () {
String val1 = val1Controller.text;
print(val1);
setState(() => val2Controller.text = val1);
},
),
],
),
],
),
);
}
}
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