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这篇文章给大家分享的是有关vue中vantUI如何实现文件上传功能的内容。小编觉得挺实用的，因此分享给大家做个参考，一起跟随小编过来看看吧。
说在前面
网上有很多种文件上传的方法，根据公司最近的业务需求，要求实现多种文件的上传，在实现过程中，查阅了很多资料，最后，终于把功能实现了，开心！
<template>
<div>
<v-header :left-text="`上传${columnName}`"></v-header>
<div class="upload">
<div v-if="columnName === '视频'">
<div class="forPreview_video" v-for="(item, index) in uploadVideoList" :key="index">
<video :src="videoSrc"></video>
<van-icon name="delete" @click="delBtn(index)" class="delte"/>
</div>
<van-uploader v-show="uploadVideoList.length < 2" preview-size="80px" accept="video/*" :before-read="beforeRead" :after-read="afterRead"></van-uploader>
</div>
<div v-if="columnName === '文档'">
<div class="forPreview_doc" v-for="(item, index) in uploadDocList" :key="index">
<img src="../../assets/img/resource_doc_b@2x.png" alt="">
<span>{{item.name}}</span>
<span>{{item.size | formatSize}}</span>
<van-icon name="delete" @click="delBtn(index)" class="delte"/>
</div>
<van-uploader v-show="uploadDocList.length < 2" preview-size="80px" accept=".doc, .docx, .xml, .xlsx, .pdf" :before-read="beforeRead" :after-read="afterRead"></van-uploader>
</div>
<div v-if="columnName === '音频'">
<div class="forPreview_audio" v-for="(item, index) in uploadAudioList" :key="index">
<img src="../../assets/img/resource_audio@2x.png" alt="">
<span>{{item.name}}</span>
<span>{{item.size | formatSize}}</span>
<van-icon name="delete" @click="delBtn(index)" class="delte"/>
</div>
<van-uploader v-show="uploadAudioList.length < 2" preview-size="80px" accept="audio/*" :before-read="beforeRead" :after-read="afterRead"></van-uploader>
</div>
<div v-if="columnName === '图片'">
<div class="forPreview_pic" v-for="(item, index) in uploadPicList" :key="index">
<img :src="picSrc" alt="">
<van-icon name="delete" @click="delBtn(index)" class="delte"/>
</div>
<van-uploader v-show="uploadPicList.length < 2" accept="image/*" preview-size="80px" :before-read="beforeRead" :after-read="afterRead"></van-uploader>
</div>
<div class="diy-submit">
<van-button @click="doSubmit($event)">提交</van-button>
</div>
</div>
</div>
</template>上述html代码是在同一页面根据前一页面传回的columnName的值来判断需要上传哪种类型文件。
<script>
import VHeader from '../../common/header'
import {classifyList, uploadFile, addResources} from '../../http/mock'
import Toast from 'vant'
export default {
name: "uploadFile",
components: {
VHeader
},
data(){
return{
tagList: [],
uploadTitle: '',
currentTag: null,
tagId: null,
columnName: localStorage.getItem('columnName'),
fileIdArr: [],
uploadVideoList: [], // 选中的上传视频列表
videoSrc: '', // 选中的视频的src，用来显示视频
uploadDocList: [], // 选中的上传文档列表
uploadAudioList: [], // 选中的上传音频列表
uploadPicList: [], // 选中的上传图片列表
picSrc: '', // 选中的图片的src，用来显示图片缩略图
}
},
filters: {
formatSize(val) { // 格式化文件大小
if (val > 0) {
return (val / 1024 / 1024).toFixed(2) + 'M';
} else {
return '0M';
}
},
},
methods: {
// vant上传文件前校验文件事件
// 文件选中后先提交给后台，后台根据选中的文件，返回数组（这一业务根据后台而定）
beforeRead(file){
let formData = new FormData(); // 为上传文件定义一个formData对象
let config = {
headers: {
'Content-Type': 'multipart/form-data'
}
};
let uploadUrl = URL.createObjectURL(file); // 将选中的上传文件转化为二进制文件，显示在页面上
if(this.columnName === '视频'){
this.uploadVideoList.push(file);
this.videoSrc = uploadUrl;
// 这里使用foreach是为了将选中的多个文件都添加进定义的formdata变量中
this.uploadVideoList.forEach(item => {
formData.append(item.name, item)
})
}else if(this.columnName === '文档'){
this.uploadDocList.push(file);
this.uploadDocList.forEach(item => {
formData.append(item.name, item)
})
}else if(this.columnName === '音频'){
this.uploadAudioList.push(file);
this.uploadAudioList.forEach(item => {
formData.append(item.name, item)
})
}else if(this.columnName === '图片'){
this.uploadPicList.push(file);
this.picSrc = uploadUrl;
this.uploadPicList.forEach(item => {
formData.append(item.name, item)
})
}
// formData.append(file.name, file); // 单个文件上传时可以这么写，上面的foreach就可以删掉
this.$api.post(uploadFile, formData, config).then(res => {
this.fileIdArr = res.data.data; // 把選中的文件傳送給後台
}).catch(err => {
Toast('文件上傳失敗！')
})
},
// 删除待上传的文件
delBtn(index){
if(this.columnName === '视频'){
// 先判断当前的选中的索引是否是在有效范围中，如果不是则跳出方法
if(isNaN(index) || index >= this.uploadVideoList.length){
return false;
}
let tmp = [];
// 将没被选中的上传文件存放进一个临时数组中
for(let i = 0; i < this.uploadVideoList.length; i++){
if(this.uploadVideoList[i] !== this.uploadVideoList[index]){
tmp.push(this.uploadVideoList[i]);
}
}
// 存放当前未被选中的上传文件
this.uploadVideoList = tmp;
}
if(this.columnName === '文档'){
console.log(this.uploadDocList.length)
if(isNaN(index) || index >= this.uploadDocList.length){
return false;
}
let tmp = [];
for(let i = 0; i < this.uploadDocList.length; i++){
if(this.uploadDocList[i] !== this.uploadDocList[index]){
tmp.push(this.uploadDocList[i]);
}
}
this.uploadDocList = tmp;
}
if(this.columnName === '音频'){
if(isNaN(index) || index >= this.uploadAudioList.length){
return false;
}
let tmp = [];
for(let i = 0; i < this.uploadAudioList.length; i++){
if(this.uploadAudioList[i] !== this.uploadAudioList[index]){
tmp.push(this.uploadAudioList[i]);
}
}
this.uploadAudioList = tmp;
}
if(this.columnName === '图片'){
if(isNaN(index) || index >= this.uploadPicList.length){
return false;
}
console.log('uuu')
let tmp = [];
for(let i = 0; i < this.uploadPicList.length; i++){
if(this.uploadPicList[i] !== this.uploadPicList[index]){
tmp.push(this.uploadPicList[i]);
}
}
this.uploadPicList = tmp;
}
},
doSubmit(){
let params = {
classify: this.tagId, // 针对视频资源时对应的分类id
file: this.fileIdArr, // 选择完文件后，调用uploadFile这个接口，后端返回的数组
resourceColumnId: JSON.parse(localStorage.getItem('columnId')), // 资源栏目id(视频、图片、音频、文档)
title: this.uploadTitle // 上传时填写的标题
};
let columnName = localStorage.getItem('columnName')
this.$api.post(addResources, params).then(res => {
if(res.data.code === 1001){
if(columnName === '视频'){
this.$router.push({name: 'myVideo'});
}else {
this.$router.push({name: 'myResourceClassify'});
}
}
}).catch(err => {
console.log(err)
})
},
},
mounted(){
this.getClassifyList();
}
}
</script>
<style lang="less" scoped>
.upload{
padding: 140px 36px 160px 36px;
box-sizing: border-box;
}
.forPreview_video{
position: relative;
/*background: rgba(0,0,0,.7);*/
video{
width: 95%;
max-height: 430px;
}
.delte{
position: absolute;
right: 0;
bottom: 0;
}
}
.forPreview_doc, .forPreview_audio{
display: flex;
margin-bottom: 10px;
align-items: center;
img{
width: 56px;
height: 56px;
margin-right: 20px;
}
span:nth-of-type(1){
flex: 1;
}
span:nth-of-type(2){
margin-right: 20px;
}
}
.forPreview_pic{
display: flex;
align-items: flex-end;
img{
width: 160px;
height: 160px;
}
}
.diy-detail{
width: 100%;
overflow: hidden;
.btn{
span{
margin-bottom: 10px;
}
}
.van-cell{
background-color: #F0F0F0;
border-radius: 35px;
font-size: 26px;
height: 69px;
line-height: 69px;
padding: 0 22px;
color: #999;
}
.van-hairline--top-bottom::after, .van-hairline-unset--top-bottom::after {
border-width: 0;
}
p{
height: 64px;
line-height: 64px;
font-size: 32px;
color: #333;
position: relative;
padding-left: 16px;
}
p::before{
position: absolute;
top: 0;
left: 0;
content: '*';
color: #FF0000;
}
span{
display: inline-block;
width: 157px;
background: #F0F0F0;
border-radius: 35px;
color: #999;
font-size: 26px;
padding: 14px 18px;
margin-right: 28px;
text-align: center;
}
.active{
color: #fff;
background: linear-gradient(to right,#FD5130,#FA6C34);
}
}
.diy-submit {
position: fixed;
height: 150px;
width: 90%;
bottom: 0;
background: #fff;
.van-button {
width: 100%;
height: 90px;
border-radius: 45px;
font-size: 36px;
color: #fff;
background: linear-gradient(to right, #FD5130, #FA6C34);
top: 50%;
transform: translate(0, -50%);
}
.van-button--default {
border: none;
}
}
</style>感谢各位的阅读！关于“vue中vantUI如何实现文件上传功能”这篇文章就分享到这里了，希望以上内容可以对大家有一定的帮助，让大家可以学到更多知识，如果觉得文章不错，可以把它分享出去让更多的人看到吧！
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