[图片]

function download (url, fileName) {   const x = new XMLHttpRequest()   x.responseType = 'blob'   x.open('GET', url, true)   x.send()   x.onload = () => {     const downloadElement = document.createElement('a')     const href = window.URL.createObjectURL(x.response) // create download url     downloadElement.href = href     downloadElement.download = fileName // set filename (include suffix)     document.body.appendChild(downloadElement) // append <a>     downloadElement.click() // click download     document.body.removeChild(downloadElement) // remove <a>     window.URL.revokeObjectURL(href) // revoke blob   } } export { download }

[代码]// 多图上传[代码][代码]choosePhoto(e){[代码][代码]  [代码][代码]var[代码] [代码]that = [代码][代码]this[代码][代码];[代码][代码]  [代码][代码]wx.chooseImage({[代码][代码]    [代码][代码]count: 6, [代码][代码]// 默认9[代码][代码]    [代码][代码]sizeType: [[代码][代码]'original'[代码][代码], [代码][代码]'compressed'[代码][代码]], [代码][代码]// 可以指定是原图还是压缩图，默认二者都有[代码][代码]    [代码][代码]sourceType: [[代码][代码]'album'[代码][代码], [代码][代码]'camera'[代码][代码]], [代码][代码]// 可以指定来源是相册还是相机，默认二者都有[代码][代码]    [代码][代码]success: [代码][代码]function[代码] [代码](res) {[代码][代码]      [代码][代码]// 返回选定照片的本地文件路径列表，tempFilePath可以作为img标签的src属性显示图片[代码][代码]      [代码][代码]var[代码] [代码]len = res.tempFilePaths.length;[代码][代码]      [代码][代码]for[代码][代码]([代码][代码]var[代码] [代码]i=0;i<len;i++){[代码][代码]        [代码][代码]that.data.picLists.push(res.tempFilePaths[i])[代码][代码]      [代码][代码]}[代码][代码]      [代码][代码]var[代码] [代码]imgs = that.data.picLists.length;[代码][代码]      [代码][代码]console.log(imgs)[代码][代码]      [代码][代码]if[代码] [代码](imgs >= 6) {[代码][代码]        [代码][代码]that.data.aShow = [代码][代码]true[代码][代码];[代码][代码]        [代码][代码]that.data.picLists.length = 6[代码][代码]      [代码][代码]}[代码][代码]else[代码][代码]{[代码][代码]        [代码][代码]that.data.aShow = [代码][代码]false[代码][代码];[代码][代码]      [代码][代码]}[代码][代码]      [代码][代码]that.setData({[代码][代码]        [代码][代码]picLists: that.data.picLists,[代码][代码]        [代码][代码]tShow: [代码][代码]true[代码][代码],[代码][代码]        [代码][代码]aShow: that.data.aShow[代码][代码]      [代码][代码]})[代码][代码]      [代码][代码]console.log(that.data.picLists)[代码][代码]    [代码][代码]}[代码][代码]  [代码][代码]})[代码][代码]},[代码]