Flutter: setState不适用于分页

dependencies:
  flutter:
    sdk: flutter
  provider: ^6.0.0

import 'package:flutter/foundation.dart';

class PageModel extends ChangeNotifier {
  List<String> items = [];

  void loadMoreData() {
    // 加载更多数据的逻辑
    // ...
    // 更新items列表
    items.addAll(newItems);
    // 通知监听者数据已更新
    notifyListeners();
  }
}

import 'package:flutter/material.dart';
import 'package:provider/provider.dart';

void main() {
  runApp(
    ChangeNotifierProvider(
      create: (context) => PageModel(),
      child: MyApp(),
    ),
  );
}

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

import 'package:flutter/material.dart';
import 'package:provider/provider.dart';

class HomePage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Home'),
      ),
      body: Consumer<PageModel>(
        builder: (context, pageModel, child) {
          return ListView.builder(
            itemCount: pageModel.items.length,
            itemBuilder: (context, index) {
              return ListTile(
                title: Text(pageModel.items[index]),
              );
            },
          );
        },
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () {
          // 加载更多数据
          Provider.of<PageModel>(context, listen: false).loadMoreData();
        },
        child: Icon(Icons.add),
      ),
    );
  }
}