vue图片预览(带缩略图)

效果图：

可以结合上一篇把放大缩小旋转也加上

// 父组件需要传的参数
companyPreview: {
        imgList: [], // 所有图片数组
        index: 0, // 当前点击的图片的索引
        infinite: true,  // 是否可以循环切换
        popup: false // 弹窗的显示隐藏
      }

预览组件
<template>
  <div v-if="previewImg.popup" class="rlPopup">
    <div class="close-big-img" @click="close()">
      <em class="font_family icon-close-circle"></em>
    </div>
    <div class="prev handle-btn" v-if="!isSingle" @click="prev()">
      <em class="font_family icon-left-line"></em>
    </div>
    <div class="next handle-btn" v-if="!isSingle" @click="next()">
      <em class="font_family icon-right--line"></em>
    </div>
    <!--缩略图-->
    <div class="thumb-wrap">
      <ul>
        <li
          v-for="(img, index) in previewImg.imgList"
          :key="img"
          :class="{ active:previewImg.index === index}"
          @click="showCurrent(index)">
          <img :src="img">
        </li>
      </ul>
    </div>
    <div class="img-list-wrap">
      <div v-for="(img, i) in previewImg.imgList" :key="img">
        <img
          ref="img"
          :src="img"
          v-if="i === previewImg.index"
          :style="imgStyle">
      </div>
    </div>
  </div>
</template>

<script>
export default {
  name: 'PreviewImage',
  props: {
    previewImg: {
      type: Object,
      default: () => {}
    }
  },
  data() {
    return {
      transform: {
        scale: 1,
        degree: 0
      }
    }
  },
  computed: {
    isSingle() {
      return this.previewImg.imgList.length <= 1
    },
    isFirst() {
      return this.previewImg.index === 0
    },
    isLast() {
      return this.previewImg.index === this.previewImg.imgList.length - 1
    },
    imgStyle() {
      const { scale, degree } = this.transform
      const style = {
        transform: `scale(${scale}) rotate(${degree}deg)`
      }
      return style
    }
  },
  methods: {
    prev() {
      if (this.isFirst && !this.previewImg.infinite) return
      if (this.$parent.companyPreview.index >= 0) {
        const len = this.previewImg.imgList.length
        this.$parent.companyPreview.index = (this.$parent.companyPreview.index - 1 + len) % len
        this.reset()
      }
    },
    next() {
      if (this.isLast && !this.previewImg.infinite) return
      if (this.previewImg.imgList.length > this.$parent.companyPreview.index) {
        const len = this.previewImg.imgList.length
        this.$parent.companyPreview.index = (this.$parent.companyPreview.index + 1) % len
        this.reset()
      }
    },
    reset() {
      this.transform = {
        scale: 1,
        degree: 0
      }
    },
    showCurrent(index) {
      this.previewImg.index = index
    },
    close() {
      this.$parent.companyPreview.popup = false
    }
  }
}
</script>

<style lang="less" scoped>
  // 查看大图
  .rlPopup {
    background: rgba(0,0,0,0.7);
    .close-big-img {
      position: absolute;
      top: 20px;
      right: 2%;
      z-index: 1000;

      em {
        cursor: pointer;
        color: #ffffff;
        font-size: 36px;
      }
    }

    .handle-btn {
      position: absolute;
      top: 50%;
      transform: translateY(-50%);
      width: 66px;
      height: 66px;
      line-height: 63px;
      color: #fff;
      background-color: rgba(0, 0, 0, 0.6);
      border-radius: 4px;
      cursor: pointer;
      text-align: center;
      z-index: 10000;
      em {
        font-size: 50px;
      }
    }

    .prev {
      left: 5%;
    }

    .next {
      right: 5%;
    }

    .img-list-wrap {
      width: 100%;
      height: 100%;
      display: flex;
      justify-content: center;
      align-items: center;

      img {
        display: block;
        object-fit: scale-down;
        transition: all 0.3s;
        max-width: 800px;
        max-height: 600px;
      }
    }

    .thumb-wrap {
      position: absolute;
      bottom: 2%;
      left: 50%;
      transform: translateX(-50%);

      li {
        float: left;
        width: 60px;
        height: 45px;
        border: solid 1px #ececec;
        position: relative;
        margin-right: 5px;
        cursor: pointer;

        &:last-child {
          margin-right: 0;
        }

        img {
          max-width: 57px;
          max-height: 42px;
          display: block;
          object-fit: scale-down;
          position: absolute;
          top: 50%;
          left: 50%;
          transform: translate(-50%, -50%);
        }
      }

      .active {
        border-color: #e5242b;
      }
    }
  }
</style>