https://developers.weixin.qq.com/miniprogram/dev/framework/open-ability/bind/bind-official-account.htmlhttps://developers.weixin.qq.com/miniprogram/dev/framework/open-ability/union-id.htmlhttps://developers.weixin.qq.com/miniprogram/dev/framework/open-ability/union-id.html
小程序绑定开放平台之后,收取不到用户的unionId,但是openId可以正常获取到
