滚动菜单 flutter

想实现这个功能:

下面的代码可以实现:

dart 复制代码
import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  static const String _title = 'Flutter Code Sample';

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: _title,
      home: MyStatefulWidget(),
    );
  }
}

class MyStatefulWidget extends StatefulWidget {
  MyStatefulWidget({Key key}) : super(key: key);

  @override
  _MyStatefulWidgetState createState() => _MyStatefulWidgetState();
}

class _MyStatefulWidgetState extends State<MyStatefulWidget> {
  int _selectedIndex = 0;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Row(
        children: <Widget>[
          LayoutBuilder(
            builder: (context, constraint) {
              return SingleChildScrollView(
                child: ConstrainedBox(
                  constraints: BoxConstraints(minHeight: constraint.maxHeight),
                  child: IntrinsicHeight(
                    child: NavigationRail(
                      selectedIndex: _selectedIndex,
                      onDestinationSelected: (int index) {
                        setState(() {
                          _selectedIndex = index;
                        });
                      },
                      labelType: NavigationRailLabelType.selected,
                      destinations: [
                        NavigationRailDestination(
                          icon: Icon(Icons.favorite_border),
                          selectedIcon: Icon(Icons.favorite),
                          label: Text('First'),
                        ),
                        NavigationRailDestination(
                          icon: Icon(Icons.bookmark_border),
                          selectedIcon: Icon(Icons.book),
                          label: Text('Second'),
                        ),
                        NavigationRailDestination(
                          icon: Icon(Icons.star_border),
                          selectedIcon: Icon(Icons.star),
                          label: Text('Third'),
                        ),
                        NavigationRailDestination(
                          icon: Icon(Icons.favorite_border),
                          selectedIcon: Icon(Icons.favorite),
                          label: Text('First'),
                        ),
                        NavigationRailDestination(
                          icon: Icon(Icons.bookmark_border),
                          selectedIcon: Icon(Icons.book),
                          label: Text('Second'),
                        ),
                        NavigationRailDestination(
                          icon: Icon(Icons.star_border),
                          selectedIcon: Icon(Icons.star),
                          label: Text('Third'),
                        ),
                        NavigationRailDestination(
                          icon: Icon(Icons.bookmark_border),
                          selectedIcon: Icon(Icons.book),
                          label: Text('Second'),
                        ),
                        NavigationRailDestination(
                          icon: Icon(Icons.star_border),
                          selectedIcon: Icon(Icons.star),
                          label: Text('Third'),
                        ),
                        NavigationRailDestination(
                          icon: Icon(Icons.favorite_border),
                          selectedIcon: Icon(Icons.favorite),
                          label: Text('First'),
                        ),
                        NavigationRailDestination(
                          icon: Icon(Icons.bookmark_border),
                          selectedIcon: Icon(Icons.book),
                          label: Text('Second'),
                        ),
                        NavigationRailDestination(
                          icon: Icon(Icons.star_border),
                          selectedIcon: Icon(Icons.star),
                          label: Text('Third'),
                        ),
                        NavigationRailDestination(
                          icon: Icon(Icons.bookmark_border),
                          selectedIcon: Icon(Icons.book),
                          label: Text('Second'),
                        ),
                        NavigationRailDestination(
                          icon: Icon(Icons.star_border),
                          selectedIcon: Icon(Icons.star),
                          label: Text('Third'),
                        ),
                        NavigationRailDestination(
                          icon: Icon(Icons.favorite_border),
                          selectedIcon: Icon(Icons.favorite),
                          label: Text('First'),
                        ),
                        NavigationRailDestination(
                          icon: Icon(Icons.bookmark_border),
                          selectedIcon: Icon(Icons.book),
                          label: Text('Second'),
                        ),
                        NavigationRailDestination(
                          icon: Icon(Icons.star_border),
                          selectedIcon: Icon(Icons.star),
                          label: Text('Third'),
                        ),
                      ],
                    ),
                  ),
                ),
              );
            },
          ),
          VerticalDivider(thickness: 1, width: 1),
          // This is the main content.
          Expanded(
            child: Center(
              child: Text('selectedIndex: $_selectedIndex'),
            ),
          )
        ],
      ),
    );
  }
}
相关推荐
hi星尘27 分钟前
深度解析:Java内部类与外部类的交互机制
java·开发语言·交互
看到我,请让我去学习29 分钟前
Qt编程-qml操作(js,c++,canvas)
开发语言·qt
橘子编程29 分钟前
Python-Word文档、PPT、PDF以及Pillow处理图像详解
开发语言·python
Ronin3051 小时前
【C++】类型转换
开发语言·c++
mrbone111 小时前
Git-git worktree的使用
开发语言·c++·git·cmake·worktree·gitab
小蜜蜂嗡嗡1 小时前
Android Studio flutter项目运行、打包时间太长
android·flutter·android studio
浪裡遊2 小时前
Sass详解:功能特性、常用方法与最佳实践
开发语言·前端·javascript·css·vue.js·rust·sass
真实的菜2 小时前
JVM类加载系统详解:深入理解Java类的生命周期
java·开发语言·jvm
代码讲故事2 小时前
多种方法实现golang中实现对http的响应内容生成图片
开发语言·chrome·http·golang·图片·快照·截图
虾球xz3 小时前
CppCon 2018 学习:EFFECTIVE REPLACEMENT OF DYNAMIC POLYMORPHISM WITH std::variant
开发语言·c++·学习