Flutter：使用onGenerateRoute传递参数

import 'package:flutter/material.dart';
import 'search.dart';
import 'home.dart';
void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  final routes = {
    '/search':(context,{arguments})=>SearchPage(arguments:arguments),
  };
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home:HomePage(),
      //传入当前路由对象
      onGenerateRoute: (settings) {
		//把路由对象的name用变量保存
        final String name = settings.name;
		//保存路由对象对于的方法
        final Function pageContentBuilder = this.routes[name];
        //如果方法不为空
        if(pageContentBuilder != null){
			//如果有参数
          if(settings.arguments != null){
            final Route route = MaterialPageRoute(
              builder: (context)=>pageContentBuilder(context,arguments:settings.arguments)

            );
            //放回路由组件对象
            return route;
          }else{
            final Route route = MaterialPageRoute(
              builder: (context)=>pageContentBuilder(context)

            );
            return route;
          }
        }
      },
    );
  }
}

import 'package:flutter/material.dart';

class HomePage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          title: Text("hello flutter"),
          centerTitle: true,
        ),
        body: Center(
          child: RaisedButton(
                  child: Text("点击跳转到search页面"),
                  onPressed: (){
                  //需要传递的参数放入arguments里面
                    Navigator.pushNamed(context,'/search',arguments: {
                      "id":123
                    });

                  },
                ),
        ),
      );
  }
}

import 'package:flutter/material.dart';

  class SearchPage extends StatelessWidget {
    final arguments;
    SearchPage({this.arguments});
    @override
    Widget build(BuildContext context) {
      return Scaffold(
        appBar: AppBar(
          title: Text("Search页面"),
          centerTitle: true,
        ),
        body: Center(
          child: Text("Search页面${arguments != null ? arguments['id']:'0'} ")
        ),

      );
    }
  }