Flutter 使用ThemeProvider不在亮模式和暗模式之间切换

基本上就是标题.我将这些函数应用于CubinoSwitch值，但它没有切换.为了确保这一点，如果我将值硬编码为True，switch 将变为绿色，所以我猜这是onChanged中的某个东西.我在主题提供程序中切换它是错误的吗？

主题_提供者.dart

import 'package:chat_app/themes/dark_mode.dart';
import 'package:chat_app/themes/light_mode.dart';
import 'package:flutter/material.dart';

class ThemeProvider extends ChangeNotifier {
  final ThemeData _themeData = lightMode;

  ThemeData get getTheme => _themeData;

  bool get isDarkMode => _themeData == darkMode;

  set themeData(ThemeData themeData) {
    themeData = themeData;
    notifyListeners();
  }

  void toggleTheme() {
    themeData = isDarkMode ? lightMode : darkMode;
  }
}

设置.省道

import 'package:chat_app/themes/主题_提供者.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:provider/provider.dart';

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

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Theme.of(context).colorScheme.background,
      appBar: AppBar(
        title: const Text("Settings"),
        backgroundColor: Colors.transparent,
        elevation: 0,
        foregroundColor: Colors.grey,
      ),
      body: Container(
        decoration: BoxDecoration(
          color: Theme.of(context).colorScheme.secondary,
          borderRadius: BorderRadius.circular(12),
        ),
        margin: const EdgeInsets.all(25),
        padding: const EdgeInsets.all(16),
        child: Row(
          mainAxisAlignment: MainAxisAlignment.spaceBetween,
          children: [
            const Text("Dark Mode"),
            CupertinoSwitch(
              value: Provider.of<ThemeProvider>(context).isDarkMode,
              onChanged: (value) =>
                  Provider.of<ThemeProvider>(context, listen: false)
                      .toggleTheme(),
            ),
          ],
        ),
      ),
    );
  }
}