如何在Flutter中创建全局TextStyle？

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        // 设置全局文本样式
        textTheme: TextTheme(
          bodyText1: TextStyle(fontSize: 16, color: Colors.black),
          bodyText2: TextStyle(fontSize: 14, color: Colors.grey),
        ),
      ),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Flutter Demo Home Page'),
      ),
      body: Center(
        child: Text('Hello World'),
      ),
    );
  }
}

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return GlobalTextStyle(
      textStyle: TextStyle(fontSize: 16, color: Colors.black),
      child: Scaffold(
        appBar: AppBar(
          title: Text('Flutter Demo Home Page'),
        ),
        body: Center(
          child: Text('Hello World'),
        ),
      ),
    );
  }
}

class GlobalTextStyle extends InheritedWidget {
  final TextStyle textStyle;

  GlobalTextStyle({
    Key? key,
    required this.textStyle,
    required Widget child,
  }) : super(key: key, child: child);

  static GlobalTextStyle of(BuildContext context) {
    return context.dependOnInheritedWidgetOfExactType<GlobalTextStyle>()!;
  }

  @override
  bool updateShouldNotify(GlobalTextStyle oldWidget) => textStyle != oldWidget.textStyle;

  @override
  Widget build(BuildContext context) {
    return DefaultTextStyle(
      style: textStyle,
      child: context.widget,
    );
  }
}