小程序api的wx.getUserInfo獲取成功后返回encryptedData，官方文檔顯示encryptedData的解密數(shù)據(jù)為：

{
    "openId": "OPENID",
    "nickName": "NICKNAME",
    "gender": GENDER,
    "city": "CITY",
    "province": "PROVINCE",
    "country": "COUNTRY",
    "avatarUrl": "AVATARURL",
    "unionId": "UNIONID",
    "watermark":
    {
        "appid":"APPID",
    "timestamp":TIMESTAMP
    }
}

可以拿到openid,這樣是不是可以不需要使用wx.login()