// fileid转base64 fileidToBase64: (fileID) => { return new Promise((resolve, reject) => { try { const fs = wx.getFileSystemManager() wx.cloud.getTempFileURL({ fileList: [{ fileID, maxAge: 60 * 60, // one hour }] }).then(res => { // get temp file URL console.log('fileid 转 url :', res.fileList) const [{ tempFileURL }] = res?.fileList || [] console.log('url :', tempFileURL) wx.downloadFile({ url: tempFileURL, //仅为示例，并非真实的资源 success(res) { // 只要服务器有响应数据，就会把响应内容写入文件并进入 success 回调，业务需要自行判断是否下载到了想要的内容 console.log('下载文件: ', res); if (res.statusCode === 200) { const res1 = fs.readFileSync(res.tempFilePath, 'base64', 0) //console.log('图片base64:', res1) resolve({ base64: res1 }) } }, fail(e) { console.log('下载失败;', e); resolve({ base64: '' }) } }) }).catch(error => { // handle error resolve({ base64: '' }) }) } catch (e) { console.error(' fileid转base64 失败', e) resolve({ base64: '' }) } }) },