微信小程序登录获取openid

    wx.login({
      success(res) {
        if (res.code) {
          let code = res.code
          let appid = "wxe6f1a9f821d5c821"
          let secret = "a47225a7bfaeb8a47839969c80a59a6f"
          //发起网络请求
          wx.request({
            url: "https://api.weixin.qq.com/sns/jscode2session?appid=" + appid + "&secret=" + secret + "&js_code=" + code + "&grant_type=authorization_code",
            data: {
              code: res.code
            },
            success: function (res) {
              wx.setStorage({ //将得到的openid存储到缓存里面方便后面调用
                key: "openid",
                data: res.data.openid
              })
            }
          })
        } else {
          console.log('登录失败！')
        }
      }
    })