uni APP 怎么打开支付宝小程序

uni  APP 怎么打开支付宝小程序，直接上代码

    // #ifdef   APP-PLUS
    uni.getSystemInfo({
      success(res) {
        if (res.platform == 'android') {
          var info = `alipays://platformapi/startapp?appId=xxxxx&page=lib/shop/dist/pages/index/index`;
          plus.runtime.openURL(info);
        } else {
          var info = `alipay://platformapi/startapp?appId=xxxxxx&page=lib/shop/dist/pages/index/index`;
          plus.runtime.openURL(info);
        }
      },
    });
    // #endif