Bonjour,

je souhaiterais changer le texte d'un bouton en y cliquant dessus. Pourriez-vous m'aider svp ?

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import 'package:flutter/material.dart';
 
void main() {
  runApp(MyApp());
}
 
String textHolder = 'My Button';
 
changeText() {
    textHolder = 'HELLO';
}
 
 
class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
        visualDensity: VisualDensity.adaptivePlatformDensity,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}
 
class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);
  final String title;
 
  @override
  _MyHomePageState createState() => _MyHomePageState();
}
 
class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            for (int i = 0; i < 2; i++)
            RaisedButton(
                color: Colors.green,
                textColor: Colors.black,
                child: Text(textHolder, style: TextStyle(fontSize: 21)),
                onPressed: () => changeText(),
                ),
          ],
        ),
      ),
    );
  }
}