图片预览

借助element的图片预览组件

功能

  1. 当点击点击遮罩层时, 关闭 preview hide-on-click-modal
  2. 预览图片时, 关闭页面的鼠标滚轮 stopScroll
  3. 可以在图片预览处切换查看的图片 imageList

基础封装

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
<script setup>
import { ref } from 'vue'

const props = defineProps({
  imageList: {
    type: Array,
  },
})
//开始预览的
const previewImageIndex = ref(null)

//关闭图片预览
const closeImgViewer = () => {
  startScroll()
  previewImageIndex.value = null
}

const show = (index) => {
  stopScroll()
  previewImageIndex.value = index
}

//禁止滚动
const stopScroll = () => {
  document.body.style.overflow = "hidden"
}
//开始滚动
const startScroll = () => {
  document.body.style.overflow = "auto"
}

defineExpose({show})
</script>

<template>
  <div class="image-view">
    <el-image-viewer
     :initial-index="previewImageIndex"
     hide-on-click-modal
     :url-list="imageList"
     @close="closeImgViewer"
     v-if="previewImageIndex != null"
     >

    </el-image-viewer>
  </div>
</template>

<style scoped>
.image-view {
  el-image-viewer__mask {
  /* 背景透明度 */
    opacity: 0.9;
  }
}
</style>

调用

1
2
3
4
5
6
<!-- 图片预览 -->
 <ImageViewer 
 ref="imageViewerRef"
 :imageList="previewImageList"
>		
</ImageViewer>
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
//图片预览
const imageViewerRef = ref(null)
const previewImageList = ref([])
const imagePreview = () => {
  nextTick(() => { 
//等待下一次 DOM 更新循环结束后执行回调函数中的代码
    const imageNodeList = document
    .querySelector('#detail')
    .querySelectorAll("img")

    const imageList = []
    imageNodeList.forEach((item, index) => {
      const src = item.getAttribute("src")
      imageList.push(src)
      item.addEventListener("click", () => {
        imageViewerRef.value.show(index)
      })
    })
    previewImageList.value = imageList
  })
}