应用场景：需要在header区域，写24小时天气预测轮播，按钮在轮播图外面，默认隐藏左侧按钮，当点击右侧按钮后，左侧按钮显示，当点击到最后一个轮播图的显示时，隐藏右侧按钮。通过获取索引，监听索引的方法实现。

项目里以前使用的是swiper6.7，所以这次写这个轮播还用了6版本，没有升级。

效果：

<template>
  <div class="swiper-container">
    <div class="swiper-wrapper">
      <div class="swiper-slide swiper-no-swiping" v-for="(item, index) in hoursData" :key="item">
        <span class="icon">
          <i class="iconfont iconshijian" style="font-size: 14px;color: #5A5A68;"></i>
        </span>
        <span class="time">
          {{ item.weatherTime }}
        </span>
        <span class="day">
          {{ item.weather }}
        </span>
        <span class="temp">
          {{ item.outTemp }}℃
        </span>
      </div>
    </div>
    <!-- 前进后退按钮 -->
    <span class="swiper-button-prev" id="prev" v-show="showPrevButton" @click="handlePrevClick"></span>
    <span class="swiper-button-next" id="next" v-show="showNextButton" @click="handleNextClick"></span>
  </div>
</template>
<script>
import { Swiper, Navigation } from "swiper";
import "swiper/swiper-bundle.css";
import { onMounted, reactive, nextTick, toRefs, ref, watch } from "vue";
import { getNowAnd24HoursData } from "@/api/RunMonitor/GroupMonitorSystem"
import { getRefreshInterval } from '@/api/sourceMonitor/home.ts';

Swiper.use([Navigation]);

export default {
  props: {
    hoursData: {
      type: Array,
      default: [],
    },
    nextHourIndex: {
      type: Number,
      default: 0,
    }
  },

  setup(props) {

    const state = reactive({
      // data: [
      //   { weatherTime: '00:00', weather: '晴', outTemp: "20.3℃" },
      //   { weatherTime: '01:00', weather: '多云', outTemp: "20.3℃" },
      //   { weatherTime: '02:00', weather: '晴', outTemp: "20.3℃" },
      // ],
      showPrevButton: false, // 控制左按钮的显示和隐藏
      showNextButton: true, // 控制右按钮的显示和隐藏
      index: 0
    });

    let GalleryTop;

    const initGalleryTop = () => {
      GalleryTop = new Swiper(".swiper-container", {
        navigation: {
          nextEl: "#next",
          prevEl: "#prev",
        },
        loop: false, // 禁止循环
        noSwiping: true, // 禁止滑动
        spaceBetween: 1, // 间距
        slidesPerView: 3, // 显示数量
        freeMode: false, // 不开启自由模式
        watchSlidesVisibility: true, // 监视slide的可见性
        watchSlidesProgress: true, // 监视slide的进度
        initialSlide: props.nextHourIndex, // 初始slide的索引值
        virtual: true, //开启虚拟slides
        centeredSlides: false, // 不居中显示slides
      });
    };

    const handlePrevClick = (() => {
      return () => {
        // 在此处处理右按钮点击事件
        // console.log("点击左按钮，当前item：", props.hoursData[state.index], "当前index：", state.index);
        state.index--; // 每次点击右按钮，增加index的值
      };
    })();

    const handleNextClick = (() => {
      return () => {
        // 在此处处理右按钮点击事件
        // console.log("点击右按钮，当前item：", props.hoursData[state.index], "当前index：", state.index);
        state.index++; // 每次点击右按钮，增加index的值
      };
    })();

    watch([() => props.hoursData, () => props.nextHourIndex], () => {
      if (props.hoursData || props.nextHourIndex) {
        nextTick(() => {
          initGalleryTop();
        })
      }
      if (props.hoursData.length < 1) {
        state.showNextButton = false; // 隐藏右按钮
      }
    }, { deep: true })

    watch(() => state.index, (n) => {

      if (n > 0) {
        state.showPrevButton = true; // 显示左按钮
      } else if (n === 0) {
        state.showPrevButton = false; // 隐藏左按钮 
      }

      if (n === props.hoursData.length - 3) {
        state.showNextButton = false; // 隐藏右按钮
      } else {
        state.showNextButton = true; // 显示右按钮
      }
    })

    onMounted(() => {
    });

    return {
      ...toRefs(state),
      handleNextClick,
      handlePrevClick
    };
  },
};
</script>
<style lang="less" scoped>
.swiper-container {
  position: relative;
  width: 520px;
  height: 100%;
  padding: 0 14px;
  --swiper-navigation-size: 13px;
  --swiper-theme-color: var(--gdky-placeholder-tip-color);
  overflow: hidden;
}

.swiper-wrapper {
  position: initial;

}

.swiper-slide {
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: MicrosoftYaHei;
  height: 52px;

  .icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 14px;
    height: 14px;
    padding-top: 1px;
  }

  .time {
    color: var(--gdky-placeholder-tip-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;

  }

  .temp,
  .day {
    font-size: 14px;
    margin-left: 2px;
    color: var(--gdky-third-content-color);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
  }
}

.swiper-button-prev::after {
  margin-left: -10px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.swiper-button-next::after {
  margin-left: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}
</style>