// 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: ''
                })
            }
        })
    },