Performance - 2.1

We discovered one or more bugs in your app when reviewed on iPad and iPhone running iOS 9.3.5 on Wi-Fi connected to an IPv6 network.

Specifically, upon log in, this app returned a "未能找到使用指定主機名的伺服器" message.

The steps to reproduce are:

1. Launch app
2. Navigate to log in page
3. Fill in demo account credentials
4. Tap on log-in button
5. App returns 未能找到使用指定主機名的伺服器 message and does not log in the user

We've attached screenshot(s) for your reference.

Next Steps

Please run your app on a device while connected to an IPv6 network (all apps must support IPv6) to identify the issue(s), then revise and resubmit your app for review.

If we misunderstood the intended behavior of your app, please reply to this message in Resolution Center to provide information on how these features were intended to work.

For new apps, uninstall all previous versions of your app from a device, then install and follow the steps to reproduce the issue(s). For updates, install the new version as an update to the previous version, then follow the steps to reproduce the issue(s).

Resources

For information about supporting IPv6 Networks, please refer to 

Supporting IPv6 DNS64/NAT64 Networks and <a href="https://forums.developer.apple.com/message/136166#136166%E2%80%9D>Supporting IPv6-only Networks</a>.<BR/><BR/>For a networking overview, please see <a href=" https:="" developer.apple.com="" library="" mac="" documentation="" networkinginternetweb="" conceptual="" networkingoverview="" introduction="" introduction.html"="" style="font-family: inherit; -webkit-font-smoothing: antialiased; text-rendering: optimizelegibility; box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; font-style: inherit; font-variant-caps: inherit; line-height: inherit; vertical-align: baseline; color: rgb(0, 136, 255); text-decoration: none; cursor: pointer;">About Networking

If you have difficulty reproducing a reported issue, please try testing the workflow described in Technical Q&A QA1764: How to reproduce bugs reported against App Store submissions.

If you have code-level questions after utilizing the above resources, you may wish to consult with Apple Developer Technical Support. When the DTS engineer follows up with you, please be ready to provide:
- complete details of your rejection issue(s)
- screenshots
- steps to reproduce the issue(s)
- symbolicated crash logs - if your issue results in a crash log