在CupertinoPageScaffold中使用SnackBar

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

CupertinoPageScaffold(
  navigationBar: CupertinoNavigationBar(
    // 导航栏配置
  ),
  child: Scaffold(
    // 页面内容
  ),
)

Scaffold(
  body: Builder(
    builder: (BuildContext context) {
      return Center(
        child: CupertinoButton(
          child: Text('显示SnackBar'),
          onPressed: () {
            final snackBar = SnackBar(
              content: Text('这是一个SnackBar'),
              duration: Duration(seconds: 2),
            );
            Scaffold.of(context).showSnackBar(snackBar);
          },
        ),
      );
    },
  ),
)