uniapp抖音小程序，如何一键获取用户手机号

前端部分

点击按钮，获取手机号

<button class="button" open-type="getPhoneNumber" @getphonenumber="getPhoneNumber">一键获取</button>

传入sessionKey和encryptedData、iv

其中sessionKey是通过登录时，调用抖音接口https://developer.toutiao.com/api/apps/v2/jscode2session获得

encryptedData、iv则通过点击按钮回传的事件参数

  getPhoneNumber(e) {
    if (e.detail) {
      if (e.detail.errMsg == "getPhoneNumber:fail auth den") {
        uni.showToast({
          title: '小程序通过试运营期，才能一键获取手机号',
          icon: 'none'
        });
      }
      this.getUserPhone(e.detail)
    } else {
      this.hasPhoneValue = false
    }
  },

  async getUserPhone(query) {
    // douyin-ad-1ddba+123456 /admin/dyinAd/answerAd
    let Authorization = this.$user.token || "none Authorization";
    let http_url = this.$config.base_url + '/app/user/login/getDyPhone'
    let http_data = {
      sessionKey: this.$user.sessionKey,
      encryptedData: query.encryptedData,
      iv: query.iv,
      "admin": this.$config.admin,
    }
    let http_header = {
      Authorization
    }

    let result = await this.$http.post(http_url, http_data, http_header, 'json')
      .then(async (res) => {
        if (res && res.data) {
          let phone = {}
          Object.assign(phone, JSON.parse(res.data))
          this.formPhone = phone.phoneNumber
        }
      })
      .catch((err) => {

      });
  },

后端部分

解密手机号

async getDyPhone(query){
    const decipher = crypto.createDecipheriv(
      "aes-128-cbc",
      Buffer.from(query.sessionKey, "base64"),
      Buffer.from(query.iv, "base64")
    );
    let ret = decipher.update(query.encryptedData, "base64", 'utf8');
    ret += decipher.final('utf8');
    return ret;
  }