一、简介

uView组件的上传功能,单图上传、多图上传等。
官方文档地址:
https://www.uviewui.com/components/upload.html

二、步骤

(一)单图上传

1.效果演示:

只能上传一张,选完之后,上传的按钮消失,当然,如果图片不合适,删掉再换一张,但就是只能上传一张。

2.代码:
<template><view class="content"><u-upload :fileList="fileList1" @afterRead="afterRead" @delete="deletePic" name="1" :multiple="false" :maxCount="1" width="112rpx" height="109rpx" :deletable="true" :previewImage="true"><image src="/static/function/uploadImg.png" mode="widthFix" style="width: 112rpx;height: 110rpx;"></image></u-upload></view></template><script>export default {data() {return {// 上传图片fileList1: [],}},onLoad() {},methods: {//删除图片deletePic(e) {console.log(e);this[`fileList${e.name}`].splice(e.index, 1)},// 新增图片async afterRead(event) {console.log(event)// 当设置 mutiple 为 true 时, file 为数组格式,否则为对象格式let lists = [].concat(event.file)let fileListLen = this[`fileList${event.name}`].lengthlists.map((item) => {this[`fileList${event.name}`].push({...item,status: 'uploading',message: '上传中'})})for (let i = 0; i < lists.length; i++) {const result = await this.uploadFilePromise(lists[i].url)let item = this[`fileList${event.name}`][fileListLen]this[`fileList${event.name}`].splice(fileListLen, 1, Object.assign(item, {status: 'success',message: '',url: result}))fileListLen++}},//上传图片uploadFilePromise(url) {return new Promise((resolve, reject) => {let a = uni.uploadFile({//url: this.$common.domain+'/api/common/upload', // 仅为示例,非真实的接口地址url:'http://192.168.2.21:7001/upload', // 仅为示例,非真实的接口地址filePath: url,name: 'file',formData: {user: 'test'},success: (res) => {let data=JSON.parse(res.data) //最终传给的是字符串,这里需要转换格式resolve(data.data.url)}});})},}}</script><style lang="scss"></style>

(二)多图上传

1.效果演示:

可一次性选多张,我这里限制为两张,上传满两张则不会显示上传的logo。点击图片可预览。

2.代码:
<template><view class="content"><u-upload :fileList="fileList1" @afterRead="afterRead" @delete="deletePic" name="1" :multiple="true" :maxCount="2" width="112rpx" height="109rpx" :deletable="true" :previewImage="true"><image src="/static/function/uploadImg.png" mode="widthFix" style="width: 112rpx;height: 110rpx;"></image></u-upload></view></template><script>export default {data() {return {// 上传图片fileList1: [],}},onLoad() {},methods: {//删除图片deletePic(e) {console.log(e);this[`fileList${e.name}`].splice(e.index, 1)},// 新增图片async afterRead(event) {console.log(event)// 当设置 mutiple 为 true 时, file 为数组格式,否则为对象格式let lists = [].concat(event.file)let fileListLen = this[`fileList${event.name}`].lengthlists.map((item) => {this[`fileList${event.name}`].push({...item,status: 'uploading',message: '上传中'})})for (let i = 0; i < lists.length; i++) {const result = await this.uploadFilePromise(lists[i].url)let item = this[`fileList${event.name}`][fileListLen]this[`fileList${event.name}`].splice(fileListLen, 1, Object.assign(item, {status: 'success',message: '',url: result}))fileListLen++}},//上传图片uploadFilePromise(url) {return new Promise((resolve, reject) => {let a = uni.uploadFile({//url: this.$common.domain+'/api/common/upload', // 仅为示例,非真实的接口地址url:'http://192.168.2.21:7001/upload', // 仅为示例,非真实的接口地址filePath: url,name: 'file',formData: {user: 'test'},success: (res) => {setTimeout(() => {resolve(res.data.data)}, 1000)}});})},}}</script><style lang="scss"></style>

三、其余补充


如果一个页面上有多处上传,操作也不是很复杂,大家都是共用同一个方法。

整体搬过来用即可。

请求接口的地方需要用join处理一下

getData() {let images=[]this.fileList1.forEach((item)=>{images.push(item.url)})this.$common.request('post', '/Coupon/addCoupon', {image:images.join(','),}).then(res => {if (res.code == 1) {this.$common.success(res.msg)setTimeout(()=>{this.$common.back()},1200)}})},

新上传代码:(多图处理)

<view class="imgBox"><u-upload :fileList="fileList" @afterRead="afterRead" @delete="deletePic" :multiple="true" :maxCount="9"><image :src="$common.image('/static/talentZone/addImg.png')" mode="aspectFill"class="fileImg"></image></u-upload></view>
data() {return {// 图片列表fileList: []}},methods: {// 图片上传//删除图片deletePic(e) {console.log(e);this.fileList.splice(e.index, 1)},// 新增图片async afterRead(event) {// 当设置 mutiple 为 true 时, file 为数组格式,否则为对象格式let lists = [].concat(event.file)let fileListLen = this.fileList.lengthlists.map((item) => {this.fileList.push({...item,status: 'uploading',message: '上传中'})})for (let i = 0; i < lists.length; i++) {const result = await this.uploadFilePromise(lists[i].url)console.log(result);if(result.success){let item = this.fileList[fileListLen]this.fileList.splice(fileListLen, 1, Object.assign(item, {status: 'success',message: '',url: result}))fileListLen++}else{this.fileList.splice(fileListLen, 1)}}},//上传图片uploadFilePromise(url) {return new Promise((resolve, reject) => {let a = uni.uploadFile({url:'http://192.168.2.21:7001/upload', // 仅为示例,非真实的接口地址,换成自己上传图片的接口filePath: url,name: 'file',success: (uploadRes) => {setTimeout(()=>{let res = JSON.parse(uploadRes.data) //最终传给的是字符串,这里需要转换格式if(res.code == 0){this.$common.msg(res.msg)resolve({success:false,url:''})return;}resolve({success:true,url:res.data.url})},2000)}});})},//点击确认还需要些许修改fabu() {let images = []this.fileList.forEach((item) => {images.push(item.url.url)})// 其他接口request('post', '其他接口地址', {title: this.textValue,info: this.textValue,images: images.join(',')//重点是这里,需要看后台接收的类型进行更改}).then(res => {if (res.code == 1) {console.log(res);}})},}

图片上传

// 图片上传//删除图片deletePic(event) {this[`fileList${event.name}`].splice(event.index, 1)},// 新增图片async afterRead(event) {// 当设置 multiple 为 true 时, file 为数组格式,否则为对象格式let lists = [].concat(event.file)let fileListLen = this[`fileList${event.name}`].lengthlists.map((item) => {this[`fileList${event.name}`].push({...item,status: 'uploading',message: '上传中'})})for (let i = 0; i < lists.length; i++) {const result = await this.uploadFilePromise(lists[i].url)console.log("结果", result);if (result.success) {let item = this.fileList[fileListLen]this.fileList.splice(fileListLen, 1, Object.assign(item, {status: 'success',message: '',url: result}))fileListLen++} else {this.fileList.splice(fileListLen, 1)}}},uploadFilePromise(url) {return new Promise((resolve, reject) => {let a = uni.uploadFile({url: config[config.env].apiUrl + '/api/common/upload', // 仅为示例,非真实的接口地址filePath: url,name: 'file',formData: {user: 'test'},success: (uploadRes) => {setTimeout(() => {let res = JSON.parse(uploadRes.data) //最终传给的是字符串,这里需要转换格式if (res.code == 0) {this.$common.msg(res.msg)resolve({success: false,url: ''})return;}console.log("图片", res);resolve({success: true,url: res.data.url})}, 1000)}});})},

单图传值

data(){return{payment_credentials:''//支付凭证(线下必填)}},methods: {aaa(){if (this.fileList.length > 0) {this.payment_credentials = this.fileList[0].url.url}}}

图片回显

当内容进行修改时,需要先将上次上传过的图片进行显示(后台会返回图片数组),之后或许删除上次中的某种图片,也有可能会新上传一些图片。最后提交给后台的数据的图片数组是不带域名的。
整体步骤如下:

data() {return {// 图片列表fileList: [],//修改功能 需要提交的图片数组subImg:[]}},

1.修改,根据id 进行查询此条数据的信息,后台返回该条数据信息,这里只说图片的事。首先对images进行处理,字符串转化为数组,之后对分割后的数组subImg进行遍历循环,把图片路径(拼接好域名之后)push到fileList数组里面,这时候页面的图片就能显示了。

this.subImg = res.data.images.split(',') //字符串转化为数组this.subImg.forEach(item=>{console.log(item);this.fileList.push({url:this.$common.image(item)//拼接好域名之后push进去})})console.log(this.fileList);

2.由于修改之后提交给后台的图片数组是不带域名的,所以自定义了一个subImg数组,刚上来的时候就已经赋进去了最初始的两张图,如果删除,就根据删除的下标删除掉此数组里面的图片,每次上传新图片的时候,就把新上传后返回的图片路径push进去,这样 不管是删除还是新增都能保证sunImg数组里面的图片都是最新的,且不带域名

核心代码:

this.subImg.splice(e.index, 1)
this.subImg.push(res.data.url)

具体代码:

//删除图片deletePic(e) {console.log(e);this.fileList.splice(e.index, 1)this.subImg.splice(e.index, 1)//新增删除代码},// 新增图片async afterRead(event) {// 当设置 mutiple 为 true 时, file 为数组格式,否则为对象格式let lists = [].concat(event.file)let fileListLen = this.fileList.lengthlists.map((item) => {this.fileList.push({...item,status: 'uploading',message: '上传中'})})for (let i = 0; i < lists.length; i++) {const result = await this.uploadFilePromise(lists[i].url)console.log(result);if (result.success) {let item = this.fileList[fileListLen]this.fileList.splice(fileListLen, 1, Object.assign(item, {status: 'success',message: '',url: result}))fileListLen++} else {this.fileList.splice(fileListLen, 1)}}},//上传图片uploadFilePromise(url) {return new Promise((resolve, reject) => {let a = uni.uploadFile({url: config[config.env].apiUrl + '/api/common/upload',filePath: url,name: 'file',success: (uploadRes) => {setTimeout(() => {let res = JSON.parse(uploadRes.data) //最终传给的是字符串,这里需要转换格式if (res.code == 0) {this.$common.msg(res.msg)resolve({success: false,url: ''})return;}console.log("图片", res.data.url);this.subImg.push(res.data.url)//新增添加代码resolve({success: true,url: res.data.url})}, 2000)}});})},