flutter例子05

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Material Components',
      home: FirstPage(),
    );
  }
}

class FirstPage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('第一页'),
      ),
      body: Padding(
        padding: EdgeInsets.all(30.0),
        child: RaisedButton(
          child:  Text('跳转到第二页'),
          onPressed: () {
            Navigator.push(//1
              context,
              MaterialPageRoute(builder: (context) => SecondPage()),
            );
          },
        ),
      ),
    );
  }
}

class SecondPage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('第二页'),
      ),
      body: Padding(
        padding: EdgeInsets.all(30.0),
        child: RaisedButton(
            child: Text('回到上一页'),
            onPressed: () {
              Navigator.pop(context);//2
            }),
      ),
    );
  }
}