Flutter交互式滑块插件interactive_slider的使用

描述

interactive_slider 是一个受苹果音乐应用程序音量滑块启发的连续或分段滑块小部件。此小部件几乎无需设置即可使用，但仍然可以完全自定义！

功能特性

• 内置填充方便使用
• 可调整大小过渡效果
• 使用任何小部件作为开始/结束图标和中心标签
• 使用任何过渡持续时间和曲线
• 为进度条提供任何形状边界
• 使用归一化的进度值或轻松提供最小值/最大值以自动转换
• 使用滑块进度动画开始和结束图标
• 使用渐变颜色着色滑块的进度
• 创建任意数量的离散段来滑动

开始使用

添加依赖项

在您的 pubspec.yaml 文件中添加以下内容：

dependencies:
  interactive_slider: ^0.5.0

导入包

然后在 Dart 文件中导入：

import 'package:interactive_slider/interactive_slider.dart';

使用方法

以下是一个简单的示例代码，演示了如何使用 InteractiveSlider 小部件：

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:interactive_slider/interactive_slider.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(
        colorScheme: ColorScheme.fromSeed(
          brightness: Brightness.dark,
          seedColor: Colors.deepPurple,
        ),
        useMaterial3: true,
      ),
      home: const MyHomePage(title: 'Interactive Slider'),
    );
  }
}

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

  final String title;

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

class _MyHomePageState extends State<MyHomePage> {
  final _controller = InteractiveSliderController(0.5);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
        title: Text(widget.title),
      ),
      body: ListView(
        padding: const EdgeInsets.symmetric(vertical: 16),
        children: [
          Padding(
            padding: const EdgeInsets.symmetric(horizontal: 28),
            child: Row(
              mainAxisAlignment: MainAxisAlignment.spaceBetween,
              children: [
                ElevatedButton(
                  onPressed: () => _controller.value = 0.0,
                  child: const Text('Min'),
                ),
                ValueListenableBuilder<double>(
                  valueListenable: _controller,
                  builder: (context, progress, child) =>
                      Text(progress.toStringAsFixed(3)),
                ),
                ElevatedButton(
                  onPressed: () => _controller.value = 1.0,
                  child: const Text('Max'),
                ),
              ],
            ),
          ),
          InteractiveSlider(
            controller: _controller,
            startIcon: const Icon(CupertinoIcons.minus_circle),
            endIcon: const Icon(CupertinoIcons.add_circled),
            onChanged: (value) {
              // This callback runs repeatedly for every update
            },
            onProgressUpdated: (value) {
              // This callback runs once when the user finishes updating the slider
            },
          ),
          const Divider(),
          const InteractiveSlider(
            enabled: true,
            startIcon: Icon(CupertinoIcons.volume_down),
            endIcon: Icon(CupertinoIcons.volume_up),
          ),
          const InteractiveSlider(
            iconPosition: IconPosition.below,
            startIcon: Icon(CupertinoIcons.volume_down),
            endIcon: Icon(CupertinoIcons.volume_up),
            centerIcon: Text('Center'),
          ),
          const InteractiveSlider(
            iconPosition: IconPosition.inside,
            startIcon: Icon(CupertinoIcons.volume_down),
            endIcon: Icon(CupertinoIcons.volume_up),
            centerIcon: Text('Center'),
            unfocusedHeight: 40,
            focusedHeight: 50,
            iconGap: 16,
          ),
          const Divider(),
          const InteractiveSlider(
            unfocusedHeight: 30,
            focusedHeight: 40,
            numberOfSegments: 7,
          ),
          const InteractiveSlider(
            unfocusedHeight: 30,
            focusedHeight: 40,
            shapeBorder: RoundedRectangleBorder(
              borderRadius: BorderRadius.all(Radius.circular(8)),
            ),
          ),
          const InteractiveSlider(
            unfocusedHeight: 30,
            focusedHeight: 40,
            shapeBorder: BeveledRectangleBorder(
              borderRadius: BorderRadius.all(Radius.circular(8)),
            ),
          ),
          const Divider(),
          const InteractiveSlider(
            unfocusedOpacity: 1,
            unfocusedHeight: 30,
            focusedHeight: 40,
            foregroundColor: Colors.deepPurple,
          ),
          const InteractiveSlider(
            unfocusedOpacity: 1,
            unfocusedHeight: 30,
            focusedHeight: 40,
            gradient: LinearGradient(colors: [Colors.green, Colors.red]),
          ),
          const InteractiveSlider(
            unfocusedOpacity: 1,
            unfocusedHeight: 30,
            focusedHeight: 40,
            gradient: LinearGradient(colors: [Colors.green, Colors.red]),
            gradientSize: GradientSize.progressWidth,
          ),
        ],
      ),
    );
  }
}

这个示例展示了如何创建一个具有不同配置的 InteractiveSlider 滑块，并且通过 InteractiveSliderController 控制滑块的状态。你可以根据需要修改这些属性来自定义你的滑块。

如果您遇到任何问题或有改进建议，请随时通过 GitHub 提交问题或拉取请求。