index.vue
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<template>
<el-image-viewer
:on-close="closeViewer"
:url-list="urlList">
</el-image-viewer>
</template>
<script>
import ElImageViewer from 'element-ui/packages/image/src/image-viewer'
export default {
components: {
ElImageViewer,
},
props: {
urlList: {
type: Array,
default: function () {
return []
},
},
},
data () {
return {
wrapperElem: null,
}
},
mounted () {
this.$nextTick(() => {
let wrapper = document.getElementsByClassName(
'el-image-viewer__actions__inner'
)
let downImg = document.createElement('i')
downImg.setAttribute('class', 'el-icon-download')
wrapper[0].appendChild(downImg)
if (wrapper.length > 0) {
this.wrapperElem = wrapper[0]
this.wrapperElem.addEventListener('click', this.hideCusBtn)
}
})
},
methods: {
closeViewer () {
this.$emit('close-viewer')
},
hideCusBtn (e) {
let className = e.target.className
if (className === 'el-icon-download') {
let imgUrl = document.getElementsByClassName(
'el-image-viewer__canvas'
)[0].children[0].src
this.downloadImage(imgUrl)
}
},
downloadImage (imgUrl) {
let tmpArr = imgUrl.split('/')
let fileName = tmpArr[tmpArr.length - 1]
window.URL = window.URL || window.webkitURL
let xhr = new XMLHttpRequest()
xhr.open('get', imgUrl, true)
xhr.responseType = 'blob'
xhr.onload = function () {
if (this.status == 200) {
//得到一个blob对象
let blob = this.response
let fileUrl = window.URL.createObjectURL(blob)
let a = document.createElement('a')
; (document.body || document.documentElement).appendChild(a)
a.href = fileUrl
if ('download' in a) {
a.download = fileName
} else {
a.setAttribute('download', fileName)
}
a.target = '_self'
a.click()
a.remove()
}
}
xhr.send()
},
},
}
</script>
<style lang="scss" scoped>
/deep/ .el-image-viewer__close {
color: #ffffff;
}
</style>