Flutter中 AlertDialog、SimpleDialog、showModalBottomSheet及第三方组件fluttertoast的使用

main.dart import 'package:flutter/material.dart'; import 'package:fluttertoast/fluttertoast.dart'; void main() { runApp(MyApp()); } class MyApp extends StatelessWidget { @override Widget build(BuildContext context) { return MaterialApp( home: Scaffold( //标题栏 appBar: