Flutter 基础总结（5） 路由的简单传值

我要你知道，这个世界上有一个人会永远等着你。无论是在什么时候，无论你在什么地方，反正你知道总会有这样一个人。

1：效果图

[图片上传中...(image.png-73b560-1584066545987-0)]

image.png
#

1：代码

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

void main() {
runApp(MyApp());
}

class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
// TODO: implement build
return MaterialApp(
  title: "页面跳转返回的数据",
  theme: ThemeData(primarySwatch: Colors.red),
  home: FirstPage(),
);
}
}

class FirstPage extends StatelessWidget {
    @override
Widget build(BuildContext context) {
// TODO: implement build
return Scaffold(
  appBar: AppBar(
    title: Text("demo"),
  ),
  body: Center(
    child: RouteButton(),
  ),
);
  }
}

class RouteButton extends StatelessWidget {
@override
Widget build(BuildContext context) {
// TODO: implement build
return RaisedButton(
  onPressed: () {_navigateToNext(context);},
  child: Text("go"),
);

}

_navigateToNext(BuildContext context) async {
var result =await Navigator.push(context, MaterialPageRoute(builder: (context) {
  return SecondScreen();
}));
Scaffold.of(context).showSnackBar(SnackBar(
   content: Text("$result"),
));
}
}

class SecondScreen extends StatelessWidget {
@override
Widget build(BuildContext context) {
// TODO: implement build
return Scaffold(
  appBar: AppBar(
    title: Text("Second"),
  ),
  body: Center(
    child: Column(
      children: <Widget>[
          RaisedButton(
            child: Text("1"),
            onPressed:(){ Navigator.pop(context,"1");},

          ),
        RaisedButton(
          child: Text("2"),
          onPressed: (){
            Navigator.pop(context,"2");
          },
        ),
      ],

    ),

  ),
);
}
}

地址githup： https://github.com/xuezhihuixzh/Flutter_demo.git