1、安装依赖并引入
npm install jszip --save
npm install file-saver --save
import JSZip from 'jszip' import FileSaver from 'file-saver' 2、将远程或本地图片的url转换成base64,然后下载/** *多个图片压缩成zip导出 */ private downloadZip() { let that = this const zip = new JSZip() let arrs:any = [] // 这个数组只用于判断图片是否都转换成base64 setTimeout(_ => { let arr = that.multipleSelections // 待转换的数据(包含图片的名和地址) arr.forEach((item:any) => { let fileName = item.orgName // 图片那么 let url = '' // item.shareImg 是图片地址 that.getBase64(item.shareImg, (dataURL:any) => { url = dataURL // 图片url转换成base64 zip.file(fileName + '.png', url.substring(22), { base64: true }) arrs.push(url) if (arrs.length === that.multipleSelections.length) { // 若要导出的图片全部转换为base64了,则开始导出 zip.generateAsync({ type: 'blob' }).then(content => { FileSaver.saveAs(content, '二维码.zip') }) } }) }) }, 0) } // 图片url转换成base64 private getBase64(url:string, callback:any) { var Img = new Image() var dataURL = '' Img.src = url + '?v=' + Math.random() Img.setAttribute('crossOrigin', 'Anonymous') Img.onload = function() { var canvas:any = document.createElement('canvas') var width = Img.width var height = Img.height canvas.width = width canvas.height = height canvas.getContext('2d').drawImage(Img, 0, 0, width, height) dataURL = canvas.toDataURL('image/jpeg') return callback ? callback(dataURL) : null } }
JSzip API地址:https://stuk.github.io/jszip/documentation/api_jszip/constructor.html