微信小程序多图上传
最近在写小程序的商品上传，为方便需要使用多张图片的上传的功能。因为小程序不支持数组的多张图片同时上传，然后根据自己的需求创建了一个组件希望能够帮到大家
效果图
- 创建一个图片上传的promise
uploadFilePromise(filePath, Authorization) {
return new Promise(function(resolve, reject) {
wx.uploadFile({
url: `${DOMAIN}File/Image/upload`,
filePath,
name: 'file',
header: {
Authorization,
},
success: res => {
// 触发图片上传事件
let data = JSON.parse(res.data);
if (data.code != SUCCESS_CODE) { //SUCCESS_CODE为本项目请求成功的判断无需在意
wx.showToast({
title: data.message || '上传失败',
icon: 'none'
})
} else {
resolve(res)
}
},
fail: res => {
reject(res)
}
});
})
},
- 创建一个promise.all （多个图片上传成功后再改变dom)
chooseImage(){
wx.chooseImage({
count,
sizeType: ['original', 'compressed'],
sourceType: ['album', 'camera'],
success(res) {
const tempFilePaths = res.tempFilePaths; //拿到选择的图片地址
that.triggerEvent('disableBtn', {}, {}); //上传过程中禁用父组件中的保存按钮，防止图片未上传成功
let promiseList = tempFilePaths.map(temp => that.uploadFilePromise(temp, Authorization)); //获取promise 队列数组
Promise.all(promiseList).then((result) => {
let uploadImgList = result.map(item => ({ file_key: JSON.parse(item.data).data.key, url: JSON.parse(item.data).data.url })).reverse();
imgList.unshift(...uploadImgList); //将新上传的图片从头部插入原图片数组中
that.triggerEvent('Upload', { imgList, key }) //上传成功将新的图片数组给到组件
})
}
})
}
- 完整js 文件
import Dialog from '../../../../miniprogram_npm/@vant/weapp/dialog/dialog';
import {
DOMAIN,
TOKEN_KEY,
SUCCESS_CODE
} from "../../../../configs";
Component({
/**
* 组件的属性列表
*/
properties: {
imgList: { //图片列表
type: [Array],
value: [],
},
max: { //最大可以上传数
type: [Number],
value: 10
},
key: { //图片列表key
type: [String],
value: ''
}
},
/**
* 组件的初始数据
*/
data: {
},
methods: {
upload(e) {
const {key,max} = e.target.dataset;
let imgList = this.data.imgList,
listLen=imgList.length,
count = parseInt(max - listLen) > 9 ? 9 : parseInt(max - listLen),
that = this;
var Authorization = wx.getStorageSync(TOKEN_KEY);
if (listLen >= max) {
wx.showToast({
title: `最多上传${max}张图片`,
icon: 'none',
duration: 2000
});
return false;
}
wx.chooseImage({
count,
sizeType: ['original', 'compressed'],
sourceType: ['album', 'camera'],
success(res) {
const tempFilePaths = res.tempFilePaths;
that.triggerEvent('disableBtn', {}, {});
let promiseList = tempFilePaths.map(temp => that.uploadFilePromise(temp, Authorization));
Promise.all(promiseList).then((result) => {
let uploadImgList = result.map(item => ({ file_key: JSON.parse(item.data).data.key, url: JSON.parse(item.data).data.url })).reverse();
imgList.unshift(...uploadImgList);
that.triggerEvent('Upload', { imgList, key })
})
}
})
},
uploadFilePromise(filePath, Authorization) {
return new Promise(function(resolve, reject) {
wx.uploadFile({
url: `${DOMAIN}File/Image/upload`,
filePath,
name: 'file',
header: {
Authorization,
},
success: res => {
// 触发图片上传事件
let data = JSON.parse(res.data);
if (data.code != SUCCESS_CODE) {
wx.showToast({
title: data.message || '上传失败',
icon: 'none'
})
} else {
resolve(res)
}
},
fail: res => {
reject(res)
}
});
})
},
delete(e) {
const { key, index } = e.target.dataset;
Dialog.confirm({
selector: '#create-dialog',
title: '提示',
message: '确认删除该图吗？'
}).then(() => {
this.triggerEvent('Delete', {key,index})
}).catch(() => {
// on cancel
})
},
}
})
- 创建一个wxml
<view class="product-img-list">
<view class="img-box" wx:for="{
{imgList}}" wx:key="index">
<van-image src="{
{item.url}}" mode="widthFix" lazy-load custom-class="product-img"></van-image>
<view bindtap="delete" data-index="{
{index}}" data-key="{
{key}}">删除</view>
</view>
<image src="http://image.end.wiki/[email protected]?imageslim" data-key="{
{key}}" data-max="{
{max}}" class="add-image-icon" bindtap="upload" mode="aspectFit|aspectFill|widthFix" lazy-load="false" binderror="" bindload=""></image>
</view>
- 写上样式wxss
.product-img-list {
display: flex;
flex-wrap: wrap;
}
.product-img-list .img-box {
width: 100rpx;
margin-right: 24rpx;
display: flex;
flex-direction: column;
align-items: center;
color: #909090;
font-size: 28rpx;
margin-top: 32rpx;
}
.img-box .product-img{
width: 100rpx;
height: 100rpx;
margin-bottom: 24rpx;
}
.add-image-icon {
width: 100rpx;
height: 100rpx;
margin-top: 32rpx;
}
- 父组件的调用–wxml
<banner-uploader max="10" imgList="{
{form.bannerList}}" key="bannerList" bindUpload="uploadProImg" bindDelete="deleteProImg" binddisableBtn="disableBtn"></banner-uploader>
7.父组件的调用 --js
//上传图片
uploadProImg(e) {
let form = this.data.form,
key = e.detail.key,
imgList = e.detail.imgList;
form[key] = imgList;
this.setData({ form, btnDisabled: false })
},
//上传按钮禁用
disableBtn(e) {
this.setData({ btnDisabled: true })
},
//删除图片
deleteProImg(e) {
let form = this.data.form,
key = e.detail.key,
index = e.detail.index,
keyList = form[key];
keyList.splice(index, 1);
form[key] = keyList;
this.setData({ form })
},