質問編集履歴
3
追記
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@@ -117,4 +117,128 @@
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##
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以上、どなたか教えてくださると助かります。
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-
お願いいたします。
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お願いいたします。
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## 追記
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修正後のコード
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```ここに言語を入力
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//入力画面
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import 'package:flutter/material.dart';
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void main() {
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runApp(MyApp());
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}
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class MyApp extends StatelessWidget {
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String name;
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@override
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Widget build(BuildContext context) {
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return MaterialApp(
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theme: ThemeData(
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primarySwatch: Colors.blue,
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visualDensity: VisualDensity.adaptivePlatformDensity,
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),
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home: Scaffold(
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appBar: AppBar(
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title: Text('入力画面'),
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),
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body: Center(
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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TextField(
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onChanged: (value) {
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setState((){
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name = value;
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});
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},
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decoration: InputDecoration(
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hintText: 'ここに入力した値を次の画面に渡したい'
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),
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),
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TextField(
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decoration: InputDecoration(
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hintText: 'ここに入力した値を次の画面に渡したい'
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),
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),
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RaisedButton(
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child: Text('確認画面へ'),
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onPressed: (){
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Navigator.push(
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context,
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MaterialPageRoute(builder: (context) => Scaffold(
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appBar: AppBar(
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title: Text('確認画面'),
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),
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body: Center(
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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Text(name),
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Text(name),
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],
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),
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),
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),
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),
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);
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}
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),
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],
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),
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),
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)
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);
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}
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}
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//確認画面
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class NextPage extends StatelessWidget{
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@override
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Widget build(BuildContext context) {
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return MaterialApp(
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theme: ThemeData(
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primarySwatch: Colors.blue,
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visualDensity: VisualDensity.adaptivePlatformDensity,
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),
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home: NextPage2(),
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);
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}
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}
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class NextPage2 extends StatelessWidget{
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NextPage2({this.name});
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final String name;
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@override
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Widget build(BuildContext context){
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return Scaffold(
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appBar: AppBar(
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title: Text('確認画面'),
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),
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body: Center(
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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Text(name),
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Text(name),
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],
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),
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),
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);
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}
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}
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```
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エラー
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```ここに言語を入力
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lib/main.dart:28:21: Error: The method 'setState' isn't defined for the class 'MyApp'.
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- 'MyApp' is from 'package:test20210124/main.dart' ('lib/main.dart').
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Try correcting the name to the name of an existing method, or defining a method named 'setState'.
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setState((){
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^^^^^^^^
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```
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2
修正
title
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File without changes
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body
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@@ -78,8 +78,6 @@
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78
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//確認画面
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class NextPage extends StatelessWidget{
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NextPage({this.name});
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final String name;
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@override
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Widget build(BuildContext context) {
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@@ -88,23 +86,33 @@
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primarySwatch: Colors.blue,
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visualDensity: VisualDensity.adaptivePlatformDensity,
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),
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home:
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home: NextPage2(),
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appBar: AppBar(
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title: Text('確認画面'),
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),
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body: Center(
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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Text(name),
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Text(name),
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],
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),
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),
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)
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);
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}
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}
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class NextPage2 extends StatelessWidget{
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NextPage2({this.name});
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final String name;
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@override
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Widget build(BuildContext context){
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return Scaffold(
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appBar: AppBar(
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title: Text('確認画面'),
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),
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body: Center(
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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Text(name),
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Text(name),
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],
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),
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),
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);
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}
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}
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```
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##
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1
追記
title
CHANGED
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File without changes
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CHANGED
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@@ -8,6 +8,15 @@
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Navigator operation requested with a context that does not include a Navigator.
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```
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実行ボタンを押すと下記エラーが表示される。
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```ここに言語を入力
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lib/main.dart:28:21: Error: The method 'setState' isn't defined for the class 'MyApp'.
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- 'MyApp' is from 'package:test20210123/main.dart' ('lib/main.dart').
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Try correcting the name to the name of an existing method, or defining a method named 'setState'.
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setState((){
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^^^^^^^^
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```
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## コード
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```ここに言語を入力
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//入力画面
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@@ -18,51 +27,60 @@
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}
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class MyApp extends StatelessWidget {
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String name;
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@override
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Widget build(BuildContext context) {
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return MaterialApp(
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theme: ThemeData(
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primarySwatch: Colors.blue,
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-
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visualDensity: VisualDensity.adaptivePlatformDensity,
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),
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home: Scaffold(
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appBar: AppBar(
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title: Text('入力画面'),
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),
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home: Scaffold(
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-
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appBar: AppBar(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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TextField(
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decoration: InputDecoration(
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-
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title: Text('入力画面'),
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),
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),
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body: Center(
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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-
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TextField(
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onChanged: (value) {
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setState((){
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name = value;
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});
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},
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-
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decoration: InputDecoration(
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-
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hintText: 'ここに入力した値を次の画面に渡したい'
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45
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-
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),
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),
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TextField(
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decoration: InputDecoration(
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hintText: 'ここに入力した値を次の画面に渡したい'
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60
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),
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),
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62
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RaisedButton(
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child: Text('確認画面へ'),
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64
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onPressed: (){
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65
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Navigator.push(
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context,
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MaterialPageRoute(builder: (context) => NextPage(name: name)),
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68
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);
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69
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}
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),
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71
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],
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46
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),
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47
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-
RaisedButton(
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48
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child: Text('確認画面へ'),
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49
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-
onPressed: (){
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50
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Navigator.push(
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51
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context,
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52
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MaterialPageRoute(builder: (context) => NextPage()),
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);
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54
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-
}
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),
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],
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57
73
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),
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58
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),
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59
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-
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74
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)
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60
75
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);
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61
76
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}
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62
77
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}
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63
78
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64
79
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//確認画面
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65
80
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class NextPage extends StatelessWidget{
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81
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+
NextPage({this.name});
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82
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final String name;
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83
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+
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66
84
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@override
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67
85
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Widget build(BuildContext context) {
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68
86
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return MaterialApp(
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|
@@ -78,8 +96,8 @@
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78
96
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child: Column(
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79
97
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mainAxisAlignment: MainAxisAlignment.center,
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80
98
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children: [
|
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81
|
-
Text(
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99
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+
Text(name),
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82
|
-
Text(
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100
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+
Text(name),
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83
101
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],
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84
102
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),
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|
85
103
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),
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