背景

本文主要解决小程序内部，分享朋友圈时生成海报中包含“带参小程序码”的场景；

步骤

开通云环境（不做介绍）

编写云函数

生成二维码

#      配置权限
{
  "permissions": {
    "openapi": [
      "wxacode.getUnlimited"
    ]
  }
}

上传到云服务
获取临时链接

// 云函数入口文件
const cloud = require('wx-server-sdk')
cloud.init()
const db = cloud.database();
let response = function (code, data, msg) {
  return {
    code: code,
    data: data,
    msg: msg || '成功'
  }
}

exports.main = async (event, context) => {
  const wxContext = cloud.getWXContext()
  console.log({
    event,
    openid: wxContext.OPENID,
    appid: wxContext.APPID,
    unionid: wxContext.UNIONID,
  })
  try {
    const imgData = await cloud.openapi.wxacode.getUnlimited({
      "page": event.path,
      "scene": event.scene
    })
    let imgType = imgData.contentType.split('/')[1];
    console.log('图片类型:', imgType);
    let fileData = await cloud.uploadFile({
      cloudPath: `appletQRCode/${event.createTime}QRCode.${imgType}`,
      fileContent: imgData.buffer,
    })

    const fileList = [fileData.fileID]
    const result = await cloud.getTempFileURL({
      fileList: fileList,
    })

    return response(10000, result.fileList, '成功')
  } catch (err) {
    return response(20000, err, '失败')
  }
}

使用云函数

WX_getQRCode 这个是云函数名称，自行定义

wx.cloud.callFunction('WX_getQRCode', {
      path: 'pages/all-goods/all-goods',
      scene: 'azzzzzbc_234',
    })
    .then((res) => {
      console.log(res)
    })