wx.login({

    success(res) {

        //发起网络请求

        wx.cloud.callFunction({

            name: ‘login’

        }).then(res2 => {

            console.log(res2)

            kkid = res.result

            return db.collection(‘zhongdui’).add({

                data: {

                    openid: res.result

                }

            })

        })

    }

})

如果要在wx.login之外能打印kkid 值，还需配合async / await 使用