Clear text field

main.dart

import 'package:flutter/material.dart';

void main() => runApp(const MyApp());

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return const MaterialApp(
      title: 'Limpando a caixa de texto',
      home: MyCustomForm(),
    );
  }
}

// Define a custom Form widget.
class MyCustomForm extends StatefulWidget {
  const MyCustomForm({super.key});

  @override
  State<MyCustomForm> createState() => _MyCustomFormState();
}

class _MyCustomFormState extends State<MyCustomForm> {
  final myController = TextEditingController();


  @override
  void dispose() {
    myController.dispose();
    super.dispose();
  }

  
  void setFilter(value) {
    print('Set filter: $value');
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Retrieve Text Input'),
      ),
      body: Padding(
        padding: const EdgeInsets.all(16.0),
        child: Column(
          children: [
            TextField(
              controller: myController,
              onChanged: setFilter,
              decoration: InputDecoration(
                 suffixIcon: IconButton(
                   icon: const Icon(Icons.clear),
                   onPressed: () => myController.text = '',
                 ),
              ),
            ),
          ],
        ),
      ),
    );
  }
}