Flutter长按按钮功能插件hold_down_button的使用

插件介绍

hold_down_button 是一个Flutter包，当一个小部件被长按时可以触发重复的动作。它允许用户自定义时间延迟曲线，以更快或更慢的速度触发动作，并设置周期性函数调用的时间延迟。

获取开始

添加到依赖项

在 pubspec.yaml 文件中添加以下内容：

dependencies:
  hold_down_button: ^1.1.0

导入包

在Dart文件中导入该包：

import 'package:hold_down_button/hold_down_button.dart';

使用方法

使用默认值的小部件

最简单的用法是使用默认参数创建一个 HoldDownButton 小部件：

HoldDownButton(
  onHoldDown: () => print('Pressed'),
  child: ElevatedButton(
    onPressed: () => print('Pressed'),
    child: const Text('ElevatedButton'),
  ),
),

自定义初始延迟曲线

您可以自定义不同的等待时间来改变触发行为：

HoldDownButton(
  onHoldDown: () => print('Pressed'),
  longWait: const Duration(seconds: 1),
  middleWait: const Duration(milliseconds: 750),
  minWait: const Duration(milliseconds: 500),
  child: ElevatedButton(
    onPressed: () => print('Pressed'),
    child: const Text('ElevatedButton'),
  ),
),

改变周期性函数调用的时间延迟

通过设置 holdWait 参数来调整周期性函数调用的时间间隔：

HoldDownButton(
  onHoldDown: () => print('Pressed'),
  holdWait: const Duration(milliseconds: 200),
  child: ElevatedButton(
    onPressed: () => print('Pressed'),
    child: const Text('ElevatedButton'),
  ),
),

完整示例代码

下面是一个完整的示例代码，展示了如何在一个应用程序中使用 hold_down_button 包：

// Flutter Packages
import 'package:flutter/material.dart';

// This Package
import 'package:hold_down_button/hold_down_button.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.purple,
      ),
      darkTheme: ThemeData(
        brightness: Brightness.dark,
        primarySwatch: Colors.purple,
      ),
      themeMode: ThemeMode.dark,
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;

  void _incrementCounter() {
    setState(() {
      _counter++;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.spaceEvenly,
          children: <Widget>[
            const Text(
              'You have pushed the button this many times:',
            ),
            Text(
              '$_counter',
              style: Theme.of(context).textTheme.headlineMedium,
            ),
            const Divider(
              thickness: 2,
            ),
            HoldDownButton(
              onHoldDown: _incrementCounter,
              child: const Text('Text'),
            ),
            const Divider(
              thickness: 2,
            ),
            HoldDownButton(
              onHoldDown: _incrementCounter,
              longWait: const Duration(milliseconds: 1000),
              middleWait: const Duration(milliseconds: 600),
              minWait: const Duration(milliseconds: 300),
              child: ElevatedButton(
                onPressed: _incrementCounter,
                child: const Text('ElevatedButton'),
              ),
            ),
            const Divider(
              thickness: 2,
            ),
            HoldDownButton(
              onHoldDown: _incrementCounter,
              longWait: const Duration(milliseconds: 2000),
              middleWait: const Duration(milliseconds: 1500),
              minWait: const Duration(milliseconds: 1200),
              holdWait: const Duration(milliseconds: 1000),
              child: TextButton(
                onPressed: _incrementCounter,
                child: const Text('TextButton'),
              ),
            ),
            const Divider(
              thickness: 2,
            ),
            HoldDownButton(
              onHoldDown: _incrementCounter,
              longWait: const Duration(milliseconds: 100),
              middleWait: const Duration(milliseconds: 100),
              minWait: const Duration(milliseconds: 100),
              holdWait: const Duration(milliseconds: 100),
              child: InkWell(
                onTap: _incrementCounter,
                child: Ink(
                  width: 100,
                  height: 100,
                  color: Colors.red,
                  child: const Center(
                    child: Text('Ink & InkWell'),
                  ),
                ),
              ),
            ),
          ],
        ),
      ),
      floatingActionButton: HoldDownButton(
        onHoldDown: _incrementCounter,
        child: FloatingActionButton(
          onPressed: _incrementCounter,
          child: const Icon(Icons.add),
        ),
      ),
    );
  }
}

以上代码展示了如何在一个Flutter应用中集成并使用 hold_down_button 插件，包括基本用法和一些高级配置选项。希望这能帮助您更好地理解和使用这个插件！如果觉得这个包有用，请记得给它点赞👍🏼和加星⭐哦！