Flutter重叠滑块插件overlapped_slider的使用

Overlapped Slider

一个水平方向的重叠滑块小部件。中间的小部件会位于堆栈的顶部。

Demo

安装

在 pubspec.yaml 文件中添加依赖：

dependencies:
  overlapped_slider: ^1.0.0

然后导入包：

import 'package:overlapped_slider/overlapped_slider.dart';

如何使用

只需添加一个 OverlappedSlider 小部件，并传入必要的参数。

以下是一个完整的示例代码：

import 'dart:math';
import 'package:flutter/material.dart';
import 'package:overlapped_slider/overlapped_slider.dart';

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

class MyApp extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'Overlapped Slider',
      theme: ThemeData(
        primarySwatch: Colors.blue,
        visualDensity: VisualDensity.adaptivePlatformDensity,
      ),
      home: MyHomePage(title: 'Overlapped Slider'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key? key, this.title}) : super(key: key);

  final String? title;

  [@override](/user/override)
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  // 生成一个包含多个小部件的列表。您可以使用其他方法
  List<Widget> widgets1 = List.generate(
    5,
    (index) => ClipRRect(
      borderRadius: const BorderRadius.all(
        Radius.circular(5.0),
      ),
      child: Image.asset(
        'assets/images/$index.jpg', // 图片存储在 assets 文件夹中
        fit: BoxFit.fill,
      ),
    ),
  );
  List<Widget> widgets2 = List.generate(
    5,
    (index) => Container(
      height: 60,
      clipBehavior: Clip.hardEdge,
      decoration: BoxDecoration(
          shape: BoxShape.circle,
          color: Colors.white,
          image: DecorationImage(
              fit: BoxFit.contain,
              image: AssetImage("assets/images/$index.jpg"))),
    ),
  );

  [@override](/user/override)
  Widget build(BuildContext context) {
    var screenWidth = MediaQuery.of(context).size.width;
    var screenHeight = MediaQuery.of(context).size.height;

    return Scaffold(
      backgroundColor: Colors.blueGrey,
      // 使用 Center 将滑块放置在屏幕中心
      body: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          const SizedBox(
            height: 20,
          ),
          SizedBox(
            // 使用 SizedBox 设置滑块的高度。不需要指定宽度。
            height: min(screenWidth / 3.3 * (16 / 9), screenHeight * .9),
            child: OverlappedSlider(
              widgets: widgets1, // 小部件列表
              currentIndex: 2,
              onClicked: (index) {},
            ),
          ),
          const SizedBox(
            height: 20,
          ),
          SizedBox(
            // 使用 SizedBox 设置滑块的高度。不需要指定宽度。
            height: min(
              screenWidth / 3 * (2 / 1),
              screenHeight * 0.5 * screenWidth,
            ),
            child: OverlappedSlider(
              widgets: widgets2, // 小部件列表
              currentIndex: 2,
              onClicked: (index) {},
            ),
          ),
        ],
      ),
    );
  }
}