uni-app中轮播图实现大图预览

参考效果

当轮播图滑动切换的时候更新自定义下标，当图片被点击的时候大图预览。

参考代码

商品详情页轮播图交互

<script setup lang="ts">
// 轮播图变化时
const currentIndex = ref(0)
const onChange: UniHelper.SwiperOnChange = (ev) => {
  currentIndex.value = ev.detail.current
}

// 点击图片时
const onTapImage = (url: string) => {
  // 大图预览方法
  uni.previewImage({
    current: url, //图片路径
    urls: goods.value!.mainPictures, //预览图片列表
  })
}
</script>

<template>
  <!-- 商品主图 -->
  <view class="preview">
    <swiper @change="onChange" circular>
      <swiper-item v-for="item in goods?.mainPictures" :key="item">
        <image @tap="onTapImage(item)" mode="aspectFill" :src="item" />
      </swiper-item>
    </swiper>
    <view class="indicator">
      <text class="current">{{ currentIndex + 1 }}</text>
      <text class="split">/</text>
      <text class="total">{{ goods?.mainPictures.length }}</text>
    </view>
  </view>
</template>