可拖动的轮播图滑块

Draggable Carousel Slider is a Flutter package that provides a customizable carousel slider widget with draggable functionality. It allows users to easily create interactive carousel sliders where items can be dragged.

Features

• Draggable functionality: Items in the carousel slider can be dragged horizontally, providing an interactive user experience.
• Looping option: The carousel slider supports looping through items, allowing seamless navigation from the last item back to the first.
• Responsive design: The package includes features for handling various screen sizes and orientations, ensuring a consistent user experience across different devices.
• Custom child widget: Users can supply their own custom widgets as carousel items, enabling a wide range of design possibilities.

Getting started

To start using the Draggable Carousel Slider package, you can simply add the package to your pubspec.yaml file and import it into your Flutter project.

dependencies:
  ...
  draggable_carousel_slider:

Usage

import 'package:draggable_carousel_slider/draggable_carousel_slider.dart';
import 'package:flutter/material.dart';
import 'package:shimmer/shimmer.dart';

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

class MyApp extends StatefulWidget {
  const MyApp({super.key});
  @override
  State<MyApp> createState() => _MyAppPageState();
}

class _MyAppPageState extends State<MyApp> {
  @override
  void initState() {
    super.initState();
  }

  Widget _image(
    String path,
    double width,
    double height, [
    bool shimmer = false,
  ]) =>
      ClipRRect(
        borderRadius: BorderRadius.circular(16),
        child: Image.network(
          path,
          width: width,
          height: height,
          fit: BoxFit.cover,
          loadingBuilder: (
            BuildContext context,
            Widget child,
            ImageChunkEvent? loadingProgress,
          ) => AnimatedCrossFade(
              firstChild: child,
              secondChild: Shimmer.fromColors(
                baseColor: Colors.grey.shade400,
                highlightColor: Colors.grey.shade700,
                enabled: true,
                period: const Duration(seconds: 2),
                child: Container(
                  width: width,
                  height: height,
                  color: Colors.black,
                ),
              ),
              crossFadeState: shimmer ||
                      ((child as Semantics).child as RawImage).image == null
                  ? CrossFadeState.showSecond
                  : CrossFadeState.showFirst,
              duration: const Duration(milliseconds: 300),
            ),
        ),
      );

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(
          seedColor: Colors.deepPurple,
        ),
        useMaterial3: true,
      ),
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        body: SafeArea(
          child: Padding(
            padding: const EdgeInsets.symmetric(vertical: 16.0),
            child: Center(
              child: DraggableSlider(
                loop: true,
                children: [
                  _image('https://picsum.photos/id/230/600/600', 300, 300),
                  _image(
                      'https://picsum.photos/id/431/600/600', 300, 300, true),
                  _image('https://picsum.photos/id/232/600/600', 300, 300),
                  _image('https://picsum.photos/id/433/600/600', 300, 300),
                  _image('https://picsum.photos/id/234/600/600', 300, 300),
                ],
              ),
            ),
          ),
        ),
      ),
    );
  }
}