前端vue图片批量下载，导出zip压缩文件

先看看实现效果：

百度找的图片地址：

https://gimg2.baidu.com/image_search/src=http%3A%2F%2Farticle-fd.zol-img.com.cn%2Ft_s998x562c5%2Fg5%2FM00%2F0A%2F02%2FChMkJltpVKGIQENcAAKaC93UFtUAAqi5QPdcOwAApoj403.jpg&refer=http%3A%2F%2Farticle-fd.zol-img.com.cn&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=jpeg?sec=1639737146&t=96efdde36bc7cd05972cad237e23dae6%27

1、首先安装node_module插件

npm  i   jszip file-saver

2、导入插件

import { saveAs } from 'file-saver';

import JSZip from 'jszip'

3、代码实现

created(){
let arr = [{picName:'图片名字',picUrl:'https://gimg2.baidu.com/image_search/src=http%3A%2F%2Farticle-fd.zol-img.com.cn%2Ft_s998x562c5%2Fg5%2FM00%2F0A%2F02%2FChMkJltpVKGIQENcAAKaC93UFtUAAqi5QPdcOwAApoj403.jpg&refer=http%3A%2F%2Farticle-fd.zol-img.com.cn&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=jpeg?sec=1639737146&t=96efdde36bc7cd05972cad237e23dae6'}]
        this.zip(arr)
},

methods:{
        zip (arr) {
      var zip = new JSZip();
      // 创建images文件夹
      var imgFolder = zip.folder("images");
      let flag = 0 //  判断加载了几张图片的标识
           
      for (let i = 0;i < arr.length;i++) {                  //遍历数组arr
			  this.getBase64(arr[i].picUrl).then(base64=>{  //调用getBase64()方法,传入图片网络地址得到base64数据
              base64 = base64.split('base64,')[1]
              imgFolder.file(arr[i].picName+ '.png', base64, { base64: true })//自定义图片名字，存进images文件夹里面
              if (flag === arr.length - 1) {
                zip.generateAsync({ type: "blob" }).then((blob) => {
                    saveAs(blob, "压缩包名字.zip")//自定义文件压缩包名字
                })
              }
              flag++
            });
      }
    },


//传入图片地址，返回base64格式数据
       getBase64(img){
          var image = new Image();
          image.crossOrigin = '*';//解决图片跨域问题
          image.src = img;
		  return new Promise((resolve,reject)=>{
            image.onload = ()=>{
              resolve(this.getBase64Image(image));
            }
		  }) 
        },

//创建画布，将图片渲染到画布上，再将画布转为base64格式数据返回出来
getBase64Image(img,width,height) {
            var canvas = document.createElement("canvas");
            canvas.width = width ? width : img.width;
            canvas.height = height ? height : img.height;
            var ctx = canvas.getContext("2d");
            ctx.drawImage(img, 0, 0, canvas.width, canvas.height);
            var dataURL = canvas.toDataURL();
            return dataURL;	
          },
}