是否可以在Flutter中创建目录按钮？

问题描述

我在enDrawer中创建一个 listTile 。我想要的是，例如，如果我按下 标题二 按钮，页面将自动滚动到 标题二 。请大师帮我..

这是我的ListTile屏幕截图： https://drive.google.com/file/d/1oni6jsQtSgzYMhclHm6QwdozSKtPPglE/view?usp=sharing

这是我的页面截图： https://drive.google.com/file/d/10x--L3NZh5LGGfw-VbpZCWrfNcENR2Kq/view?usp=sharing

我想要在抽屉中按 Headline Two 时，页面自动滚动到 Headline Two 此屏幕截图： https://drive.google.com/file/d/1GZlJnWuFmYK9cYxuTlOroiZBTw9oVvMU/view?usp=sharing

这是我的完整代码：

import 'package:Flutter/material.dart';
import 'package:Flutter/services.dart';

class MyStotry extends StatefulWidget {
  @override
  _MyStotryState createState() => _MyStotryState();
}

class _MyStotryState extends State<MyStotry> {
  @override
  Widget build(BuildContext context) {
    SystemChrome.setEnabledsystemUIOverlays([]);
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Color(0xFF41407C),title: Text('The Story of ANU'),),endDrawer: Drawer(
        child: Container(
          child: ListView(
            children: <Widget>[
              Container(
                height: 250,child: DrawerHeader(
                  decoration: Boxdecoration(color: Color(0xFF41407C)),child: Stack(
                    children: <Widget>[
                      Center(
                        child: Text(
                          'Table of Content',style: TextStyle(
                              color: Color(0xFFF8F8F8),fontSize: 20.0),],ListTile(onTap: () {},title: Text('Headline One')),title: Text('Headline Two')),title: Text('Headline Three')),title: Text('Headline Four')),title: Text('Headline Five')),title: Text('Headline Six')),title: Text('Headline Seven')),title: Text('Headline Eight')),title: Text('Headline Nine')),title: Text('Headline Ten')),title: Text('Headline Eleven')),body: SingleChildScrollView(
        child: Padding(
          padding: EdgeInsets.all(20),child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,children: <Widget>[
              Headline1(headline1: 'Headline One'),Content(
                  content:
                      'Lorem ipsum dolor sit amet,consectetur adipiscing elit,sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam,quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident,sunt in culpa qui officia deserunt mollit anim id est laborum.'),quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. '),Headline2(headline2: 'Headline Two'),Headline2(headline2: 'Headline Three'),Headline2(headline2: 'Headline Four'),Headline2(headline2: 'Headline Five'),);
  }
}

class Headline1 extends StatelessWidget {
  Headline1({this.headline1});
  final String headline1;
  @override
  Widget build(BuildContext context) {
    return Text(
      headline1,style: TextStyle(
        fontWeight: FontWeight.w800,fontSize: 22,fontFamily: 'Georgia',color: Color(0xFF010101),textAlign: TextAlign.center,);
  }
}

class Headline2 extends StatelessWidget {
  Headline2({this.headline2});
  final String headline2;
  @override
  Widget build(BuildContext context) {
    return Container(
      padding: EdgeInsets.only(top: 10,bottom: 10),child: Text(
        headline2,style: TextStyle(
          fontFamily: 'Georgia',fontWeight: FontWeight.w800,fontSize: 18,);
  }
}

class Content extends StatelessWidget {
  Content({this.content});
  final String content;
  @override
  Widget build(BuildContext context) {
    return Container(
      padding: EdgeInsets.only(bottom: 10),child: Text(
        content,style: TextStyle(
          height: 1.5,fontFamily: "Georgia",fontSize: 15.0,textAlign: TextAlign.justify,);
  }
}

解决方法

您可以在下面复制粘贴运行完整代码
步骤1：修改类别<Window x:Class="TestMutilColumnMenu.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:local="clr-namespace:TestMutilColumnMenu" mc:Ignorable="d" Title="MainWindow" Height="350" Width="525"> <Window.Resources> <Style x:Key="MenuItem1" TargetType="{x:Type MenuItem}"> <Setter Property="BorderBrush" Value="DarkGray"/> <Setter Property="Margin" Value="1,1,1"/> </Style> </Window.Resources> <TextBox x:Name = "textBox1" HorizontalAlignment = "Left" Height = "178" Margin = "92,61,0" TextWrapping = "Wrap" Text = "Hi,this is WPF tutorial" VerticalAlignment = "Top" Width = "306"> <TextBox.ContextMenu> <ContextMenu> <ContextMenu.ItemsPanel> <ItemsPanelTemplate> <Grid VerticalAlignment="Stretch" HorizontalAlignment="Stretch"> <Grid.ColumnDefinitions> <ColumnDefinition/> <ColumnDefinition/> <ColumnDefinition/> </Grid.ColumnDefinitions> <Grid.RowDefinitions> <RowDefinition/> <RowDefinition/> <RowDefinition/> <RowDefinition/> </Grid.RowDefinitions> </Grid> </ItemsPanelTemplate> </ContextMenu.ItemsPanel> <MenuItem Grid.Row="0" Grid.Column="0" Header="Item 1" Style="{StaticResource MenuItem1}" > <MenuItem.Icon> <Image Source="/res/Image.png"/> </MenuItem.Icon> </MenuItem> <MenuItem Grid.Row="1" Grid.Column="0" Header="Item 2" Style="{StaticResource MenuItem1}" > <MenuItem.Icon> <Image Source="/res/Image.png"/> </MenuItem.Icon> </MenuItem> <MenuItem Grid.Row="2" Grid.Column="0" Header="Item 3" Style="{StaticResource MenuItem1}" ></MenuItem> <MenuItem Grid.Row="3" Grid.Column="0" Header="Item 4" Style="{StaticResource MenuItem1}" ></MenuItem> <MenuItem Grid.Row="0" Grid.Column="1" Header="Item 5" Style="{StaticResource MenuItem1}" > <MenuItem.Icon> <Image Source="/res/Image.png"/> </MenuItem.Icon> </MenuItem> <MenuItem Grid.Row="1" Grid.Column="1" Header="Item 6" Style="{StaticResource MenuItem1}" > <MenuItem.Icon> <Image Source="/res/Image.png"/> </MenuItem.Icon> </MenuItem> <MenuItem Grid.Row="2" Grid.Column="1" Header="Item 7" Style="{StaticResource MenuItem1}" > <MenuItem.Icon> <Image Source="/res/Image.png"/> </MenuItem.Icon> </MenuItem> <MenuItem Grid.Row="3" Grid.Column="1" Header="Item 8" Style="{StaticResource MenuItem1}" ></MenuItem> <MenuItem Grid.Row="0" Grid.Column="2" Header="Item 9" Style="{StaticResource MenuItem1}" ></MenuItem> <MenuItem Grid.Row="1" Grid.Column="2" Header="Item 10" Style="{StaticResource MenuItem1}" ></MenuItem> </ContextMenu> </TextBox.ContextMenu> </TextBox> 并添加Headline2

Key

第2步：使用 class Headline2 extends StatelessWidget { Headline2({Key key,this.headline2}) : super(key: key); 和List<GlobalKey>

ScrollController

第3步：将 List<GlobalKey> headLineKeyList = [ GlobalKey(),GlobalKey(),GlobalKey() ]; ScrollController _scrollController = ScrollController(); 放入ScrollController

SingleChildScrollView

第4步：SingleChildScrollView( controller: _scrollController,通过Headline

key: headLineKeyList[0]

步骤5： Headline1(key: headLineKeyList[0],headline1: 'Headline One'),的{​​{1}}呼叫ListTile

onTap

工作演示

完整代码

Scrollable.ensureVisible(headLineKeyList[0].currentContext