React如何自定義輪播圖Carousel組件

更新時間：2023年11月14日 15:07:33 作者：賀知葉

這篇文章主要介紹了React如何自定義輪播圖Carousel組件問題,具有很好的參考價(jià)值,希望對大家有所幫助,如有錯誤或未考慮完全的地方,望不吝賜教

自定義輪播圖Carousel組件

需求：

要求0-1自定義輪播圖組件，默認(rèn)自動翻頁，無限翻頁，允許點(diǎn)擊翻頁，底部有動畫進(jìn)度條，且可配置輪播時間，可以操作Children.

架構(gòu)

React: ^18.0. Hooks. Css. FunctionComponent

React : ^18.0 //未使用其他第三方庫
Hooks //進(jìn)行狀態(tài)管理模塊化設(shè)計(jì)
Css //進(jìn)行樣式分離，xxx.module.css. 局部作用域樣式。防止Css全局污染函數(shù)式編程.

需求解析

可點(diǎn)擊 + 可定義輪博時間 + 可無限輪播項(xiàng) + 動畫進(jìn)度條 + 可配置輪播圖單項(xiàng)內(nèi)容 + 業(yè)務(wù)定制化

可點(diǎn)擊：允許用戶點(diǎn)擊底部進(jìn)度條進(jìn)行對應(yīng)索引翻頁
可定義輪播時間：當(dāng)前默認(rèn)為3秒，可以根據(jù)業(yè)務(wù)來調(diào)節(jié)時間 3000ms = 3s
可無限輪播項(xiàng)：useEffect 進(jìn)行監(jiān)聽并進(jìn)行相應(yīng)的操作實(shí)現(xiàn)無線輪播
動畫進(jìn)度條：底色 #0000001a 黑色+10%的透明度固定寬度，動畫顏色為 #FFFFFF 動態(tài)寬度

.css{
 animation-name: progressBar; // 指定要綁定到選擇器的關(guān)鍵幀的名稱 name = progressBar
 animation-fill-mode: forwards; // 指定動畫在執(zhí)行時間之外應(yīng)用的值 forwards = 保留最后一個關(guān)鍵幀設(shè)置的樣式值
 animation-iteration-count: infinite; // 指定動畫播放的次數(shù) infinite = 播放無限次
 animation-duration: 3s // 一個周期所需的時間長度 3s = 3秒
}

可配置輪播圖單項(xiàng)內(nèi)容：React.Children.map 和 React.cloneElement

需求解決

一、import Carousel, { CarouselItem, CarouselInfo } from “./Carousel”;

import React, { useState, useEffect } from "react";
import style from "./carousel.module.css";

/**
 * @param {children} children ReactNode
 * @param {width} width 寬度
 * @param {height} height 高度
 * @param {styles} styles 樣式
 * @returns 輪播圖 單項(xiàng)
 */
export const CarouselItem = ({
  children = React.createElement("div"),
  width = "100%",
  height = "100%",
  styles = {},
}) => {
  return (
    <div
      className={style.carousel_item}
      style={{ width: width, height: height, ...styles }}
    >
      {children}
    </div>
  );
};

/**
 * @param {title} title 標(biāo)題
 * @param {describe} describe 描述
 * @param {image} image 圖片
 * @returns 輪播圖 主體
 */
export const CarouselInfo = ({ title = "", describe = "", image = "" }) => {
  return (
    <div className="carousel_info_container">
      <div className="carousel_info_info">
        <h1>{title}</h1>
        <span>{describe}</span>
      </div>
      <div className="carousel_info_image_container">
        <img src={image} alt="Jay" className="carousel_info_image" />
      </div>
    </div>
  );
};

/**
 * @param {children} children ReactNode
 * @param {switchingTime} switchingTime 間隔時間 默認(rèn)3秒 以毫秒為單位 3000ms = 3s
 * @returns 輪播圖 容器
 */
const Carousel = ({
  children = React.createElement("div"),
  switchingTime = 3000,
}) => {
  const time = ((switchingTime % 60000) / 1000).toFixed(0); // 將毫秒轉(zhuǎn)換為秒
  const [activeIndex, setActiveIndex] = useState(0); // 對應(yīng)索引

  /**
   * 更新索引
   * @param {newIndex} newIndex 更新索引
   */
  const onUpdateIndex = (newIndex) => {
    if (newIndex < 0) {
      newIndex = React.Children.count(children) - 1;
    } else if (newIndex >= React.Children.count(children)) {
      newIndex = 0;
    }
    setActiveIndex(newIndex);
    replayAnimations();
  };

  /**
   * 重置動畫
   */
  const replayAnimations = () => {
    document.getAnimations().forEach((anim) => {
      anim.cancel();
      anim.play();
    });
  };

  /**
   * 底部加載條點(diǎn)擊事件
   * @param {index} index 跳轉(zhuǎn)索引
   */
  const onClickCarouselIndex = (index) => {
    onUpdateIndex(index);
    replayAnimations();
  };

  useEffect(() => {
    const interval = setInterval(() => {
      onUpdateIndex(activeIndex + 1);
    }, switchingTime);

    return () => {
      if (interval) {
        clearInterval(interval);
      }
    };
  });

  return (
    <div className={style.container}>
      <div
        className={style.inner}
        style={{ transform: `translateX(-${activeIndex * 100}%)` }}
      >
        {React.Children.map(children, (child) => {
          return React.cloneElement(child, { width: "100%", height: "100vh" });
        })}
      </div>
      <div className={style.loading}>
        {React.Children.map(children, (child, index) => {
          return (
            <div
              className={style.indicator_outer}
              onClick={() => onClickCarouselIndex(index)}
            >
              <div
                className={style.indicator_inside}
                style={{
                  animationDuration: index === activeIndex ? `${time}s` : "0s",
                  backgroundColor: index === activeIndex ? "#FFFFFF" : null,
                }}
              />
            </div>
          );
        })}
      </div>
    </div>
  );
};

export default Carousel;

二、import style from “./carousel.module.css”;

.container {
  overflow: hidden;
}

.inner {
  white-space: nowrap;
  transition: transform 0.3s;
}

.carousel_item {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 200px;
  color: #fff;
  background-color: #312520;
}

.loading {
  position: absolute;
  bottom: 0;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  margin-bottom: 10px;
  width: 100%;
}

.indicator_outer {
  width: 90px;
  height: 7px;
  background-color: #0000001a;
  margin-left: 20px;
  border-radius: 5px;
}

.indicator_inside {
  height: 100%;
  border-radius: 5px;
  animation-fill-mode: forwards;
  animation-name: progressBar;
  animation-iteration-count: infinite;
}

@keyframes progressBar {
  0% {
    width: 0%;
  }
  100% {
    width: 100%;
  }
}

三、 App.js

import "./App.css";
import React, { useState } from "react";

import JayOne from "./assets/1.jpeg";
import JayTwo from "./assets/2.jpeg";
import JayThree from "./assets/3.jpeg";
import JayFour from "./assets/4.jpeg";

import Carousel, { CarouselItem, CarouselInfo } from "./Carousel";

// 輪播圖數(shù)據(jù)
const info = [
  {
    id: 1,
    title: "Jay",
    describe: "2000—11—07",
    image: JayOne,
    backgroundColor: "#425066",
  },
  {
    id: 2,
    title: "范特西",
    describe: "2001—09—20",
    image: JayTwo,
    backgroundColor: "#1bd1a5",
  },
  {
    id: 3,
    title: "范特西PLUS",
    describe: "2001—12—28",
    image: JayThree,
    backgroundColor: "#a78e44",
  },
  {
    id: 4,
    title: "八度空間",
    describe: "2002—07—18",
    image: JayFour,
    backgroundColor: "#493131",
  },
];

const App = () => {
  return (
        <Carousel>
          {info?.map((item) => {
            return (
              <CarouselItem
                key={item.id}
                styles={{ backgroundColor: item.backgroundColor }}
              >
                <CarouselInfo
                  title={item.title}
                  describe={item.describe}
                  image={item.image}
                />
              </CarouselItem>
            );
          })}
        </Carousel>
  );
};

export default App;

效果圖