Flutter 导航在路线之间移除

Question

在我的 flutter 应用程序中，我想在路由之间删除，这样当用户按下返回键时，它将转到上一个屏幕。以下是我的屏幕流程。

仪表板登陆屏幕。
用户点击列出主题按钮并登陆主题列表页面。
用户点击 创建新主题 并登陆新页面，其中包含用于填写主题基本信息的表单。
填写表单后，用户点击保存按钮，登陆新页面，其中包含他刚刚创建的主题详细信息。
现在，如果用户点击返回，he/she 应该进入 主题列表 页面，而不是 创建新主题 页面。
此外，如果他再次从主题列表页面返回，他应该会看到仪表板而不是退出应用程序。

提前致谢。

Answer 1

当您想要跳过 back.

页面时，只需使用 pushReplacement 而不是 push

import 'dart:math';

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter naviagtion',
      theme: ThemeData(
        backgroundColor: Colors.white,
        primarySwatch: Colors.green,
      ),
      home: DashboardLandingScreen(),
    );
  }
}

class DashboardLandingScreen extends StatelessWidget {
  static Route route() => MaterialPageRoute(
        builder: (context) => DashboardLandingScreen(),
      );

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Container(
        alignment: Alignment.center,
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text('Dashboard landing screen.'),
            RaisedButton(
              child: Text('List of Topics'),
              onPressed: () => Navigator.of(context).push(
                TopicsListScreen.route(),
              ),
            ),
          ],
        ),
      ),
    );
  }
}

class TopicsListScreen extends StatelessWidget {
  static Route route() => MaterialPageRoute(
        builder: (context) => TopicsListScreen(),
      );

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Container(
        alignment: Alignment.center,
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text('List of Topics'),
            RaisedButton(
              child: Text('Create New Topic'),
              onPressed: () => Navigator.of(context).push(
                NewTopic.route(),
              ),
            ),
          ],
        ),
      ),
    );
  }
}

class NewTopic extends StatelessWidget {
  static Route route() => MaterialPageRoute(
        builder: (context) => NewTopic(),
      );

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Container(
        alignment: Alignment.center,
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text('page: new topic'),
            RaisedButton(
              child: Text('Save'),
              onPressed: () => Navigator.of(context).pushReplacement(
                CreatedTopicDetails.route(),
              ),
            ),
          ],
        ),
      ),
    );
  }
}

class CreatedTopicDetails extends StatelessWidget {
  static Route route() => MaterialPageRoute(
        builder: (context) => CreatedTopicDetails(),
      );

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Container(
        alignment: Alignment.center,
        child: Text('page: created topic details'),
      ),
    );
  }
}

Flutter 导航在路线之间移除

Flutter navigation removing in between routes

flutter

flutter-navigation