const promisic = function (n) {
  return function (t = {}) {
    return new Promise((c, r) => {
      const s = Object.assign(t, {
        success: n => {
          c(n)
        },
        fail: n => {
          r(n)
        }
      });
      n(s)
    })
  }
},

这个方法可以把小程序的方法转换promise 例如

promisic(wx.getStorage)().then(res=>{
  console.log(res)
}).catch(err=>{
  console.err(err)
})

或者

async getStorage() {
 const res = await promisic(wx.getStorage)()
 console.log(res)
}

https://developers.weixin.qq.com/community/develop/article/doc/00028cbc2e04e0ddf549d535351c13

const authorization = function authorization(app) {
        let _this = this
            //需要用户同意授权获取自身相关信息
        return new Promise(() => {
            wx.getSetting({
                success: function(res) {
                    if (res.authSetting['scope.userInfo']) {
                        //将授权结果写入app.js全局变量
                        app.globalData.hasLogin = true
                            //从云端获取用户资料
                        wx.cloud.callFunction({
                            name: 'get_userinfo',
                            data: {
                                getSelf: true
                            },
                            success: res => {
          if (res.errMsg == "cloud.callFunction:ok" && res.result) {
                        //如果成功获取到
                //将获取到的用户资料写入app.js全局变量
        app.globalData.userInfo = res.result.data.userData
           app.globalData.userId = res.result.data._id
             // wx.switchTab({
                     //     url: '/pages/home/home'
                    // })
                  } else {
                    console.log("未注册")
                                }
                            },
          fail: err => {
          wx.showToast({
               title: '请检查网络状态',
               duration: 800
               icon: 'none'
                                })
          console.error("get_setUserInfo调用失败", err.errMsg)
                            }
                        })
                    } else {
                        console.log("未授权")
                    }


                },
                fail(err) {
                    wx.showToast({
                        title: '请检查网络您的状态',
                        duration: 800,
                        icon: 'none'
                    })
        console.error("wx.getSetting调用失败", err.errMsg)


                }
            })
        })
    }