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a2ff340b4d
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e1f360094e |
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@ -1,16 +1,23 @@
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// 引入 React 核心库
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import * as React from "react";
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import * as React from "react";
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// 引入 Embla Carousel 的自动播放插件
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import Autoplay from "embla-carousel-autoplay";
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import Autoplay from "embla-carousel-autoplay";
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// 引入自定义 UI 组件:Card 和 CardContent(通常用于内容容器)
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import { Card, CardContent } from "@/ui/card";
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import { Card, CardContent } from "@/ui/card";
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// 引入自定义轮播组件及其子组件和类型定义
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import {
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import {
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Carousel,
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Carousel,
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CarouselContent,
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CarouselContent,
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CarouselItem,
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CarouselItem,
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CarouselNext,
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CarouselNext,
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CarouselPrevious,
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CarouselPrevious,
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type CarouselApi,
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type CarouselApi, // Embla 轮播实例的类型定义
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} from "@/ui/carousel";
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} from "@/ui/carousel";
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// 定义轮播图使用的图片资源路径数组
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const imageUrls = [
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const imageUrls = [
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"/images/carousel-1.jpg",
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"/images/carousel-1.jpg",
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"/images/carousel-2.jpg",
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"/images/carousel-2.jpg",
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@ -20,80 +27,122 @@ const imageUrls = [
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"/images/carousel-6.jpg",
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"/images/carousel-6.jpg",
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];
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];
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// 定义组件接收的 props 接口,提供类型安全
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export interface CarouselDemoProps {
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export interface CarouselDemoProps {
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paginationPosition?: 'left' | 'right'; // 默认右下角
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// 分页指示器位置:'left' 表示左下角,'right' 表示右下角,默认为 'right'
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paginationStyle?: 'dot' | 'bar'; // 默认圆形
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paginationPosition?: 'left' | 'right';
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// 分页指示器样式:'dot' 为圆形小点,'bar' 为横向小条,默认为 'dot'
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paginationStyle?: 'dot' | 'bar';
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}
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}
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// 导出 CarouselDemo 组件,接收两个可选 props,并设置默认值
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export function CarouselDemo({
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export function CarouselDemo({
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paginationPosition = 'right',
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paginationPosition = 'right', // 默认右下角
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paginationStyle = 'dot',
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paginationStyle = 'dot', // 默认圆形指示器
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}: CarouselDemoProps) {
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}: CarouselDemoProps) {
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// 存储 Embla 轮播实例的引用,用于控制滚动等操作
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const [api, setApi] = React.useState<CarouselApi>();
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const [api, setApi] = React.useState<CarouselApi>();
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// 当前激活的幻灯片索引(从 0 开始)
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const [current, setCurrent] = React.useState(0);
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const [current, setCurrent] = React.useState(0);
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// 总共的幻灯片数量(由 Embla API 动态获取)
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const [count, setCount] = React.useState(0);
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const [count, setCount] = React.useState(0);
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// 图片总数(用于渲染轮播项)
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const totalSlides = imageUrls.length;
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const totalSlides = imageUrls.length;
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// 副作用:监听 api 变化,初始化轮播状态并绑定 select 事件
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React.useEffect(() => {
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React.useEffect(() => {
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if (!api) return;
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if (!api) return; // 如果 api 尚未就绪,直接返回
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// 获取所有 snap 点的数量(即幻灯片总数)
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setCount(api.scrollSnapList().length);
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setCount(api.scrollSnapList().length);
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// 设置当前选中的 snap 索引
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setCurrent(api.selectedScrollSnap());
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setCurrent(api.selectedScrollSnap());
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// 监听轮播切换事件(用户手动滑动或自动播放时触发)
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api.on("select", () => {
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api.on("select", () => {
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setCurrent(api.selectedScrollSnap());
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setCurrent(api.selectedScrollSnap()); // 更新当前激活项
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});
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});
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}, [api]);
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}, [api]); // 仅当 api 发生变化时重新执行
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// 渲染组件
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return (
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return (
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// 外层容器:相对定位,占满父容器宽高
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<div className="relative w-full h-full">
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<div className="relative w-full h-full">
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{/* 轮播主容器 */}
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<Carousel
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<Carousel
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opts={{ loop: true }}
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opts={{
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loop: true, // 启用循环播放(最后一张后回到第一张)
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}}
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plugins={[
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plugins={[
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// 配置自动播放插件:每 3 秒切换一次,且用户交互时不暂停
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Autoplay({
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Autoplay({
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delay: 3000,
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delay: 3000,
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stopOnInteraction: false,
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stopOnInteraction: false,
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}),
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}),
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]}
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]}
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setApi={setApi}
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setApi={setApi} // 将 Embla 实例保存到 state 中
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className="w-full h-full"
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className="w-full h-full" // 占满容器
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>
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>
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{/* 轮播内容区域 */}
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<CarouselContent className="h-full w-full -ml-0">
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<CarouselContent className="h-full w-full -ml-0">
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{/* 遍历图片数组,为每张图创建一个轮播项 */}
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{imageUrls.map((src, index) => (
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{imageUrls.map((src, index) => (
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<CarouselItem key={index} className="w-full h-full pl-0">
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<CarouselItem
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key={index}
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className="w-full h-full pl-0" // 移除默认内边距
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>
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{/* 内部包裹层:无内边距,占满 */}
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<div className="p-0 w-full h-full">
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<div className="p-0 w-full h-full">
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{/* 使用 CardContent 包裹图片,移除默认间距 */}
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<CardContent className="flex items-center justify-center p-0 w-full h-full m-0">
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<CardContent className="flex items-center justify-center p-0 w-full h-full m-0">
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{/* 图片元素:自动填充容器,保持比例裁剪 */}
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<img
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<img
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src={src}
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src={src}
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alt={`Slide ${index + 1}`}
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alt={`Slide ${index + 1}`} // 无障碍访问描述
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className="w-full h-full object-cover"
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className="w-full h-full object-fill" // 关键:使图片覆盖整个区域
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loading="lazy"
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loading="lazy" // 懒加载优化性能
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/>
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/>
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</CardContent>
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</CardContent>
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</div>
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</div>
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</CarouselItem>
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</CarouselItem>
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))}
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))}
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</CarouselContent>
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</CarouselContent>
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{/* 上一张按钮(左箭头) */}
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<CarouselPrevious className="absolute left-2 top-1/2 -translate-y-1/2 z-10" />
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<CarouselPrevious className="absolute left-2 top-1/2 -translate-y-1/2 z-10" />
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{/* 下一张按钮(右箭头) */}
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<CarouselNext className="absolute right-2 top-1/2 -translate-y-1/2 z-10" />
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<CarouselNext className="absolute right-2 top-1/2 -translate-y-1/2 z-10" />
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</Carousel>
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</Carousel>
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{/* 分页指示器 */}
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{/* 分页指示器容器:绝对定位在底部 */}
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<div
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<div
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className={`absolute bottom-4 ${
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className={`absolute bottom-4 ${
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paginationPosition === 'left' ? 'left-4' : 'right-4'
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paginationPosition === 'left' ? 'left-4' : 'right-4' // 根据 prop 控制左右位置
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} flex gap-2 z-10`}
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} flex gap-2 z-10`} // 水平排列,间距 0.5rem,置于轮播图上方
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>
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>
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{/* 动态生成指示器按钮 */}
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{Array.from({ length: count }).map((_, index) => (
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{Array.from({ length: count }).map((_, index) => (
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<button
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<button
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key={index}
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key={index}
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onClick={() => api?.scrollTo(index)}
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onClick={() => api?.scrollTo(index)} // 点击跳转到对应幻灯片
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className={`transition-colors ${
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className={`transition-colors ${
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// 根据 paginationStyle 决定形状
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paginationStyle === 'dot'
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paginationStyle === 'dot'
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? 'h-2 w-2 rounded-full'
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? 'h-2 w-2 rounded-full' // 圆形:宽高相等 + 全圆角
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: 'h-2 w-8 rounded'
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: 'h-2 w-8 rounded' // 块状:宽 2rem,高 0.5rem,带圆角
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} ${index === current ? 'bg-white' : 'bg-white/50'}`}
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} ${
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aria-label={`Go to slide ${index + 1}`}
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index === current
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? 'bg-white' // 当前项为纯白色
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: 'bg-white/50' // 非当前项为半透明白色
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}`}
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aria-label={`Go to slide ${index + 1}`} // 无障碍支持
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/>
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/>
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))}
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))}
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</div>
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</div>
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@ -14,7 +14,10 @@ import { Hotline } from "@/components/news/body/FireNews/Hotline";
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import { AutoCarouselDemo } from "@/components/AutoCarousel";
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import { AutoCarouselDemo } from "@/components/AutoCarousel";
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import { Footer } from "@/components/news/footer/footer";
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import { Footer } from "@/components/news/footer/footer";
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import { CarouselDemo } from "@/components/Carousel";
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import { CarouselDemo } from "@/components/Carousel";
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<<<<<<< HEAD
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=======
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>>>>>>> c14daff3c048d7b97f1a2e62ab201d234aaf0e77
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export function meta( ) {
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export function meta( ) {
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return [
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return [
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