Flutter悬浮交互插件hover的使用

发布于 1周前 作者 h691938207 来自 Flutter

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

  1. 导入必要的包

    import 'package:flutter/material.dart';
    import 'package:hover/hover.dart';
    
  2. 定义主应用类

    void main() => runApp(HoverExample());
    
  3. 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
        );
      }
    }
    
  4. 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)),
                    );
                  }),
            ),
          ],
        ),
      );
    }
    
  5. 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

  1. 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。
  2. 在Flutter中,悬浮检测通常是通过GestureDetectoronEnteronExit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。
  3. 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!

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