标签:return context title Text key 传递数据 Navigator Todo
1、
import 'package:flutter/foundation.dart'; import 'package:flutter/material.dart'; class Todo { final String title; final String description; Todo(this.title, this.description); } void main() { runApp(MaterialApp( title: 'Passing Data', home: TodosScreen( todos: List.generate( 20, (i) => Todo( 'Todo $i', 'A description of what needs to be done for Todo $i', ), ), ), )); } class TodosScreen extends StatelessWidget { final List<Todo> todos; TodosScreen({Key key, @required this.todos}) : super(key: key); @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: Text('Todos'), ), body: ListView.builder( itemCount: todos.length, itemBuilder: (context, index) { return ListTile( title: Text(todos[index].title), // When a user taps on the ListTile, navigate to the DetailScreen. // Notice that we're not only creating a DetailScreen, we're // also passing the current todo through to it! onTap: () { Navigator.push( context, MaterialPageRoute( builder: (context) => DetailScreen(todo: todos[index]), ), ); }, ); }, ), ); } } class DetailScreen extends StatelessWidget { // Declare a field that holds the Todo final Todo todo; // In the constructor, require a Todo DetailScreen({Key key, @required this.todo}) : super(key: key); @override Widget build(BuildContext context) { // Use the Todo to create our UI return Scaffold( appBar: AppBar( title: Text(todo.title), ), body: Padding( padding: EdgeInsets.all(16.0), child: Text(todo.description), ), ); } }
2、
import 'package:flutter/material.dart'; // 引入新页面 import 'page.dart'; void main() => runApp(MyApp()); class MyApp extends StatelessWidget { @override Widget build(BuildContext context) { return MaterialApp( title: 'Flutter Demo', // 处理Named页面跳转 传递参数 onGenerateRoute: (RouteSettings setting) { if(setting.name == '/page') { return MaterialPageRoute(builder: (context) => Page(id: setting.arguments['id'])); } }, theme: ThemeData( primarySwatch: Colors.blue, ), home: MyHomePage(title: 'Flutter Demo Home Page'), ); } } class MyHomePage extends StatelessWidget { MyHomePage({Key key, this.title}) : super(key: key); final String title; @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: Text(this.title), ), body: Center( child: GestureDetector( onTap: (){ // 进行Named页面跳转 传递参数 Navigator.pushNamed(context, '/page', arguments: { "id": 1} ); }, child: Text("go next page with params"), ), ), ); } }
3、页面接受参数 page.dart
import 'package:flutter/material.dart'; class Page extends StatelessWidget{ Page({this.id}); final int id; @override Widget build(BuildContext context) { return Material( child: Center( child: Text("hi this is next page, id is $id"), ), ); } }
标签:return,context,title,Text,key,传递数据,Navigator,Todo 来源: https://www.cnblogs.com/timba1322/p/12511793.html
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