Flutter悬浮交互插件hover的使用
Flutter悬浮交互插件hover的使用
Hover
是一个用于导航、主题切换、响应式设计等的辅助库和小部件库。该库旨在减少 Flutter 应用开发中的样板代码。
示例代码
以下是 Hover
插件的完整示例代码:
import 'package:flutter/material.dart';
import 'package:hover/hover.dart';
import 'app/profile_example.dart';
import 'app/forms/login_form_example.dart';
import 'app/mobile_responsiveness_example.dart';
import 'app/forms/sign_up_form_example.dart';
import 'app/view_splitter_example.dart';
import 'app/widgets_gallery.dart';
void main() => runApp(HoverExample());
class HoverExample extends StatelessWidget {
final MobileResponsivenessExample mobileResponsivenessExample =
MobileResponsivenessExample();
final ProfileExample profilePage = ProfileExample();
final LoginFormExample signInFormExample = LoginFormExample();
final SignUpFormExample signUpFormExample = SignUpFormExample();
final WidgetsGallery widgetsGallery = WidgetsGallery();
final ViewSplitterExample viewSplitterExample = ViewSplitterExample();
@override
Widget build(BuildContext context) {
return Hover.create(
pages: [
signUpFormExample,
mobileResponsivenessExample,
widgetsGallery,
signInFormExample,
viewSplitterExample,
profilePage,
],
themes: {
"light": ThemeData.light(),
"dark": ThemeData.dark(),
},
providers: [],
appBarBuilder: _buildAppBar,
drawerBuilder: _buildDrawer,
);
}
///
/// A Drawer builder function that will be used to
/// create a globally accessible navigation drawer
///
Drawer _buildDrawer(BuildContext context) {
final items = {
"Login": signInFormExample,
"Sign Up": signUpFormExample,
"Profile": profilePage,
"Hover Widgets": widgetsGallery,
"Mobile Responsive Example": mobileResponsivenessExample,
"View Splitter Example": viewSplitterExample,
};
return Drawer(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
UserAccountsDrawerHeader(
accountName: Text("Jane Doe"),
accountEmail: Text("sample@email.com"),
currentAccountPicture: CircleAvatar(
radius: 80,
backgroundImage: NetworkImage(
"https://images.pexels.com/photos/1102341/pexels-photo-1102341.jpeg?auto=compress&cs=tinysrgb&dpr=2&h=750&w=1260"),
),
),
Expanded(
child: ListView.builder(
itemCount: items.length,
itemBuilder: (context, i) {
return ListTile(
onTap: () {
Hover.router.navigateTo(
items.values.elementAt(i).routeName,
context,
);
},
title: Text(items.keys.elementAt(i)),
);
}),
),
],
),
);
}
///
/// An AppBar builder function that will be used
/// to create an app bar widget that will be
/// displayed globally
///
AppBar _buildAppBar(BuildContext context) {
return AppBar(
title: Text("Hover Sample App"),
leading: TextButton(
onPressed: () {
Hover.toggleDrawer(context);
},
child: Icon(Icons.menu, color: Colors.white),
),
);
}
}
代码解析
-
导入必要的包
import 'package:flutter/material.dart'; import 'package:hover/hover.dart';
-
定义主应用类
void main() => runApp(HoverExample());
-
创建应用类
class HoverExample extends StatelessWidget { // 定义各个页面实例 final MobileResponsivenessExample mobileResponsivenessExample = MobileResponsivenessExample(); final ProfileExample profilePage = ProfileExample(); final LoginFormExample signInFormExample = LoginFormExample(); final SignUpFormExample signUpFormExample = SignUpFormExample(); final WidgetsGallery widgetsGallery = WidgetsGallery(); final ViewSplitterExample viewSplitterExample = ViewSplitterExample(); @override Widget build(BuildContext context) { return Hover.create( pages: [ // 定义页面列表 signUpFormExample, mobileResponsivenessExample, widgetsGallery, signInFormExample, viewSplitterExample, profilePage, ], themes: { // 定义主题 "light": ThemeData.light(), "dark": ThemeData.dark(), }, providers: [], // 定义服务提供者 appBarBuilder: _buildAppBar, // 定义AppBar构建函数 drawerBuilder: _buildDrawer, // 定义Drawer构建函数 ); } }
-
定义Drawer构建函数
Drawer _buildDrawer(BuildContext context) { final items = { "Login": signInFormExample, "Sign Up": signUpFormExample, "Profile": profilePage, "Hover Widgets": widgetsGallery, "Mobile Responsive Example": mobileResponsivenessExample, "View Splitter Example": viewSplitterExample, }; return Drawer( child: Column( crossAxisAlignment: CrossAxisAlignment.start, children: <Widget>[ UserAccountsDrawerHeader( accountName: Text("Jane Doe"), accountEmail: Text("sample@email.com"), currentAccountPicture: CircleAvatar( radius: 80, backgroundImage: NetworkImage( "https://images.pexels.com/photos/1102341/pexels-photo-1102341.jpeg?auto=compress&cs=tinysrgb&dpr=2&h=750&w=1260"), ), ), Expanded( child: ListView.builder( itemCount: items.length, itemBuilder: (context, i) { return ListTile( onTap: () { Hover.router.navigateTo( items.values.elementAt(i).routeName, context, ); }, title: Text(items.keys.elementAt(i)), ); }), ), ], ), ); }
-
定义AppBar构建函数
AppBar _buildAppBar(BuildContext context) { return AppBar( title: Text("Hover Sample App"), leading: TextButton( onPressed: () { Hover.toggleDrawer(context); }, child: Icon(Icons.menu, color: Colors.white), ), ); }
更多关于Flutter悬浮交互插件hover的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html
1 回复
更多关于Flutter悬浮交互插件hover的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html
当然,以下是一个关于如何在Flutter中使用hover
插件来实现悬浮交互效果的代码案例。hover
插件允许开发者在Flutter应用中创建悬浮菜单、按钮或其他悬浮元素。不过需要注意的是,由于hover
并非Flutter官方插件,这里假设你已经在pubspec.yaml
文件中添加了相应的依赖,并且已经运行了flutter pub get
。
首先,确保你的pubspec.yaml
文件中包含了对hover
插件的依赖(注意:这里hover
是一个假设的包名,实际使用时请替换为真实的包名及其版本):
dependencies:
flutter:
sdk: flutter
hover: ^x.y.z # 替换为实际的版本号
然后,在你的Flutter应用中,你可以这样使用hover
插件来创建一个悬浮按钮:
import 'package:flutter/material.dart';
import 'package:hover/hover.dart'; // 假设hover插件的导入路径
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Hover Example',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: Scaffold(
appBar: AppBar(
title: Text('Hover Example'),
),
body: Center(
child: HoverWidgetExample(),
),
),
);
}
}
class HoverWidgetExample extends StatefulWidget {
@override
_HoverWidgetExampleState createState() => _HoverWidgetExampleState();
}
class _HoverWidgetExampleState extends State<HoverWidgetExample> {
bool isHovered = false;
@override
Widget build(BuildContext context) {
return HoverWidget(
onHover: (isHovering) {
setState(() {
isHovered = isHovering;
});
},
child: Container(
width: 100,
height: 100,
decoration: BoxDecoration(
color: isHovered ? Colors.red : Colors.grey,
borderRadius: BorderRadius.circular(10),
),
child: Center(
child: Text(
isHovered ? 'Hovered' : 'Not Hovered',
style: TextStyle(color: Colors.white),
),
),
),
);
}
}
// 假设HoverWidget是hover插件提供的一个组件,用于检测悬浮状态
// 实际使用时,请参考hover插件的文档来了解如何正确使用其API
class HoverWidget extends StatelessWidget {
final Widget child;
final ValueChanged<bool> onHover;
HoverWidget({required this.child, required this.onHover});
@override
Widget build(BuildContext context) {
// 这里只是一个示例,实际插件可能会有不同的API来实现悬浮检测
// 通常情况下,你需要使用插件提供的HoverDetector或其他组件
return GestureDetector(
onEnter: (_) => onHover(true),
onExit: (_) => onHover(false),
child: child,
);
}
}
注意:
- 上述代码中的
HoverWidget
是一个假设的组件,用于说明如何使用悬浮检测功能。在实际使用中,你需要参考hover
插件的文档来了解如何正确使用其API。 - 在Flutter中,悬浮检测通常是通过
GestureDetector
的onEnter
和onExit
回调来实现的,但具体的悬浮插件可能会提供更高级或更定制化的API。 - 由于
hover
并非一个真实存在的Flutter插件(至少在我最后的知识更新日期之前),你需要找到一个实际的悬浮交互插件,并按照其文档进行集成和使用。常见的插件搜索平台包括pub.dev
(Flutter的官方包管理器)。
希望这个示例能帮助你理解如何在Flutter中实现悬浮交互效果!