当前位置：首页 > wzjs >正文

学做网站要学哪些网站的优化策略方案

wzjs 2025/7/19 19:57:55

学做网站要学哪些,网站的优化策略方案,电商网课教材,西青网站开发简介 flutter_slidable 是一个用于创建可滑动列表项的 Flutter 插件，它允许用户通过滑动来显示隐藏的操作按钮，比如删除、分享等功能。安装在 pubspec.yaml 中添加依赖（并运行 flutter pub get）： dependencies:fl…

简介
flutter_slidable 是一个用于创建可滑动列表项的 Flutter 插件，它允许用户通过滑动来显示隐藏的操作按钮，比如删除、分享等功能。
请添加图片描述

安装
在 pubspec.yaml 中添加依赖（并运行 flutter pub get）：

dependencies:flutter_slidable: ^4.0.0

基本使用

导入包

import 'package:flutter_slidable/flutter_slidable.dart';

基本结构
Slidable 的基本结构包含以下几个主要部分：

Slidable(key: ValueKey(item), // 唯一标识endActionPane: ActionPane( // 滑动操作面板motion: ScrollMotion(), // 滑动动画children: [ // 操作按钮列表SlidableAction(...),SlidableAction(...),],),child: ListTile(...), // 主要内容
)

完整示例
下面是一个结合 TabBar 的完整示例：

import 'package:flutter/material.dart';
import 'package:flutter_slidable/flutter_slidable.dart';void main() {runApp(const MyApp());
}class MyApp extends StatelessWidget {const MyApp({super.key});@overrideWidget build(BuildContext context) {return MaterialApp(title: 'Slidable TabBar Demo',theme: ThemeData(colorScheme: ColorScheme.fromSeed(seedColor: Colors.blue), useMaterial3: true, ),home: const MyHomePage(),);}
}class MyHomePage extends StatefulWidget {const MyHomePage({super.key});@overrideState<MyHomePage> createState() => _MyHomePageState();
}class _MyHomePageState extends State<MyHomePage> with TickerProviderStateMixin {late TabController _tabController;final List<String> _tabs = ['Tab 1', 'Tab 2', 'Tab 3'];final List<List<String>> _items = [List.generate(20, (index) => 'Item 1-${index + 1}'),List.generate(20, (index) => 'Item 2-${index + 1}'),List.generate(20, (index) => 'Item 3-${index + 1}'),];@overridevoid initState() {super.initState();_tabController = TabController(length: _tabs.length, vsync: this);}@overridevoid dispose() {_tabController.dispose();super.dispose();}@overrideWidget build(BuildContext context) {return Scaffold(appBar: AppBar(title: const Text('Slidable TabBar Demo'),bottom: TabBar(controller: _tabController,tabs: _tabs.map((String tab) => Tab(text: tab)).toList(),),),body: SlidableAutoCloseBehavior( // 自动关闭其他Slidablechild:  TabBarView(controller: _tabController,children: _items.map((tabItems) => KeepAliveListView(items: tabItems)).toList(),),),);}
}class KeepAliveListView extends StatefulWidget {final List<String> items;const KeepAliveListView({super.key,required this.items,});@overrideState<KeepAliveListView> createState() => _KeepAliveListViewState();
}// 保持状态的生命周期
class _KeepAliveListViewState extends State<KeepAliveListView>with AutomaticKeepAliveClientMixin { @overridebool get wantKeepAlive => true; // 必须实现@overrideWidget build(BuildContext context) {super.build(context); // 必须调用return ListView.builder(itemCount: widget.items.length,itemBuilder: (context, index) {return Slidable(key: ValueKey(widget.items[index]),endActionPane: // 滑动动作面板，可以自定义ActionPane(motion: const ScrollMotion(),children: [SlidableAction(onPressed: (context) {ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text('Delete ${widget.items[index]}')),);// 删除操作if (mounted){setState(() {widget.items.removeAt(index);});}},backgroundColor: Colors.red,foregroundColor: Colors.white,icon: Icons.delete,label: 'Delete',),SlidableAction(onPressed: (context) {ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text('Share ${widget.items[index]}')),);if (mounted){setState(() {widget.items.removeAt(index);});}},backgroundColor: Colors.blue,foregroundColor: Colors.white,icon: Icons.share,label: 'Share',),],),child: ListTile(title: Text(widget.items[index]),),);},);}
}

核心功能说明

SlidableAutoCloseBehavior
用于自动关闭其他已打开的滑动项：

SlidableAutoCloseBehavior(child: yourWidget,
)

ActionPane
定义滑动操作面板：

ActionPane(motion: ScrollMotion(), // 滑动动画效果children: [SlidableAction(onPressed: (context) {// 处理点击事件},backgroundColor: Colors.red,foregroundColor: Colors.white,icon: Icons.delete,label: 'Delete',),],
)

滑动方向
Slidable 支持从左侧或右侧滑动：
- startActionPane: 从左侧滑动显示
- endActionPane: 从右侧滑动显示
状态保持
结合 AutomaticKeepAliveClientMixin 保持滑动列表状态：

class _KeepAliveListViewState extends State<KeepAliveListView>with AutomaticKeepAliveClientMixin {@overridebool get wantKeepAlive => true;@overrideWidget build(BuildContext context) {super.build(context); // 必须调用}
}