第一步：开放平台上添加 获取会员手机号的功能包（需要主账号签约，子账号不可见）

https://open.alipay.com/operation/mini/ops/mini-summary

第二步：添加主动触发按钮

getPhoneNumber：授权成功后的回调

onAuthError：拒绝授权后的回调

<button open-type="getAuthorize"> my.getPhoneNumber({
        success: (res) => {
          let encryptedData = JSON.parse(res.response).response;
          //userObject.phoneInfo = res.response;
          console.log(res.response);
          //手机号解密请求
          phoneAuth(res.response);
        },
        fail: (res) => {
          console.log(res);
        }
      });
function phoneAuth(e){
//后台请求操作 主要是发送加密数据
}

第四步：后台解析（低版本SDK：https://download.csdn.net/download/qq_36894527/12875709）

//应用公钥
        public static string PublicKey = "";
        //aes密钥
        public static string AESKey = "";

        /// <summary>
        /// 手机号解密
        /// </summary>
        /// <param name="openapiResult"></param>
        /// <returns></returns>
        public static string Decypt(string openapiResult, string publicKey, string aesKey)
        {
//openapiResult= "{\"response\":\"9+asiPElYO6D9jVY21115q6WIe7Lobo0vIbP5D9l0hwmHERiIhu/jsMKoWX4PdJd05BUOLL0xSFazUut+4JH2udCwOaZVJcbT9/sJgMhAavSYGUDyKB3bffXRgDLRKBL+PGcnPD6JjQUgGOM9JPFxOBwmD0U0Ylo1GDagR9pjZjtAyFzAcJYDkGrOKTpsO9nTn2MFHfkUNikX/q1gPOehUiUnvb3ZqcPVs4rEb7M5xpgoBcc/eht+zpMBLFShaBpY3BtQluHxaTeEtT3a66G/SmcoJ0yBCt1z78ZQVy9pmStMgDnmVINArQz/O2XrPUakN3TszH9U1qnoJ5C8LSu/CsS0E8XApSu1iERQjKfJlg=\",\"sign\":\"KyQCYndlwsunFXOivUJGHdg88M4HyxtucizmGarsmvc+uUVOSuQlHhnYa3iKWkVxTv76Y75JJuiZP5wSqnfU0jjln27Xi0BSh2JPTF/4oIBJlrqQxsw9bVkzaGu5bkB+Tw4sZQwO8vgg8Z7f8bu6go/BWAEd5m4ds5haTQ9enH5ZDjb7S08EJbYLe9Nnz/BJbv0M1lbW60nGr5QyDFvmnE91g2U1NhAKaZewjIm/7xsFYlQ7xh68A+fEkr4TIzA7scILGncnmQ+mU3B98I5njiTzhxig+pByCGkY2vT3U6z+4VUFUuB0+bwOBNqYp++bXQs/cAhcv+7FV/yW4Qm+9w==\"}";
                    
            //小程序通过 my.getPhoneNumber 获取到加密数据，详见获取会员手机号接入文档
            string res = "";
            JObject jObj = null;
            //1. 获取验签和解密所需要的参数
            try
            {
                jObj = (JObject)JsonConvert.DeserializeObject(openapiResult);
            }
            catch (Exception ex)
            {
                throw new Exception("获取验签和解密所需要的参数失败", ex);
            }

            string signType;
            if (openapiResult.Contains("sign_type"))
            {
                signType = jObj["sign_type"].ToString();
            }
            else
            {
                signType = "RSA2";
            }

            string charset;
            if (openapiResult.Contains("charset"))
            {
                charset = jObj["charset"].ToString();
            }
            else
            {
                charset = "UTF-8";
            }

            string encryptType;
            if (openapiResult.Contains("encrypt_type"))
            {
                encryptType = jObj["encrypt_type"].ToString();
            }
            else
            {
                encryptType = "AES";
            }

            string sign = jObj["sign"].ToString();
            string content = jObj["response"].ToString();

            //如果密文的
            bool isDataEncrypted = !content.StartsWith("{", StringComparison.Ordinal);
            bool signCheckPass = false;

            //2. 验签
            string signContent = content;
            //RSA2支付宝公钥（不是应用公钥），在控制台-小程序-开发设置-开发设置-接口加签方式-设置/查看
            string signVeriKey = publicKey;
            //填小程序设置的AES密钥。注意：若AES密钥中存在反斜杠"\\"会导致解密报错，需删除反斜杠或更改没有反斜杠的AES密钥
            string decryptKey = aesKey;
            //如果是加密的报文则需要在密文的前后添加双引号
            if (isDataEncrypted)
            {
                signContent = "\"" + signContent + "\"";
            }
            try
            {
                signCheckPass = AlipaySignature.RSACheckContent(signContent, sign, signVeriKey, charset, signType, false);
                Console.WriteLine("RSA2验签结果：" + signCheckPass);
            }
            catch (Exception ex)
            {
                //验签异常, 日志
                throw new Exception("验签失败", ex);
            }
            if (!signCheckPass)
            {
                //验签不通过（异常或者报文被篡改），终止流程（不需要做解密）
                throw new Exception("验签失败");
            }

            //3. 解密
            string plainData = null;
            if (isDataEncrypted)
            {
                try
                {

                    plainData = AlipayEncrypt.AesDencrypt(decryptKey, content, charset);
                    Console.WriteLine("AES解密结果：" + plainData);
                }
                catch (Exception ex)
                {
                    //解密异常, 记录日志
                    throw new Exception("解密异常", ex);
                }
            }
            else
            {
                plainData = content;
            }
            return plainData;
        }