如何在颤振中保存TextFormField中的int数据

int intData = 0;

TextFormField(
  controller: TextEditingController(text: intData.toString()),
  keyboardType: TextInputType.number,
  onChanged: (value) {
    intData = int.tryParse(value) ?? 0;
  },
),

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    int intData = 0;

    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('Save int data in TextFormField'),
        ),
        body: Center(
          child: TextFormField(
            controller: TextEditingController(text: intData.toString()),
            keyboardType: TextInputType.number,
            onChanged: (value) {
              intData = int.tryParse(value) ?? 0;
            },
          ),
        ),
      ),
    );
  }
}