在 Flutter 中导航到新屏幕 [英] Navigate to a new screen in Flutter

问题描述

如何在 Flutter 中导航到新屏幕?

这些问题很相似，但问的比我多.

• 代码

  main.dart

  import 'package:flutter/material.dart';无效的主要()=>运行应用程序(我的应用程序())；MyApp 类扩展 StatelessWidget {@覆盖小部件构建(BuildContext 上下文){返回材料应用程序(标题:颤振演示"，主题:ThemeData(primarySwatch:Colors.blue)，主页:主页屏幕()，);}}类 HomeScreen 扩展 StatelessWidget {@覆盖小部件构建(BuildContext 上下文){返回脚手架(appBar:AppBar(标题:文本('主屏幕'))，身体:中心(孩子:RaisedButton(孩子:文本('导航到新屏幕>>',风格:TextStyle(字体大小:24.0)，),按下:(){_navigateToNextScreen(上下文);},),),);}无效_navigateToNextScreen(BuildContext上下文){Navigator.of(context).push(MaterialPageRoute(builder: (context) => NewScreen()));}}类 NewScreen 扩展 StatelessWidget {@覆盖小部件构建(BuildContext 上下文){返回脚手架(appBar: AppBar(title: Text('New Screen')),身体:中心(孩子:文本('这是一个新屏幕',风格:TextStyle(字体大小:24.0)，),),);}}

  另见

  • 文档
  • 导航器、路线和过渡...哦，天哪！- 西蒙莱特富特 |颤动欧洲

  How do you navigate to a new screen in Flutter?

  These questions are similar, but are asking more than I am.

  • Flutter - Navigate to a new screen, and clear all the previous screens
  • Flutter: How do I navigate to a new screen using DropDownMenuItems
  • Flutter: Move to a new screen without back
  • flutter navigation to new screen not working

  I am adding an answer below.

  解决方案

  Navigate to a new screen:

  Navigator.of(context).push(MaterialPageRoute(builder: (context) => NewScreen()));
  

  where context is the BuildContext of a widget and NewScreen is the name of the second widget layout.

  Code

  main.dart

  import 'package:flutter/material.dart';
  
  void main() => runApp(MyApp());
  
  class MyApp extends StatelessWidget {
    @override
    Widget build(BuildContext context) {
      return MaterialApp(
        title: 'Flutter Demo',
        theme: ThemeData(primarySwatch: Colors.blue),
        home: HomeScreen(),
      );
    }
  }
  
  class HomeScreen extends StatelessWidget {
    @override
    Widget build(BuildContext context) {
      return Scaffold(
        appBar: AppBar(title: Text('Home Screen')),
        body: Center(
          child: RaisedButton(
            child: Text(
              'Navigate to a new screen >>',
              style: TextStyle(fontSize: 24.0),
            ),
            onPressed: () {
              _navigateToNextScreen(context);
            },
          ),
        ),
      );
    }
  
    void _navigateToNextScreen(BuildContext context) {
      Navigator.of(context).push(MaterialPageRoute(builder: (context) => NewScreen()));
    }
  }
  
  class NewScreen extends StatelessWidget {
    @override
    Widget build(BuildContext context) {
      return Scaffold(
        appBar: AppBar(title: Text('New Screen')),
        body: Center(
          child: Text(
            'This is a new screen',
            style: TextStyle(fontSize: 24.0),
          ),
        ),
      );
    }
  }
  

  See also

  • Documentation
  • Navigator and Routes and Transitions... Oh, My! - Simon Lightfoot | Flutter Europe

  这篇关于在 Flutter 中导航到新屏幕的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！