On 5 Sep 2018, at 15:28, Howard Shere <howard.sh...@synchronoss.com> wrote:

> As the subject says, I need a way to log the negotiated TLS version in an iOS 
> client app.

There isn’t a way to do that.  The ideal place for this info is 
`NSURLSessionTaskTransactionMetrics`, but it doesn’t return that specific bit 
of info, alas.  I encourage you to file an enhancement request for that.

<https://developer.apple.com/bug-reporting/>

Please post your bug number, just for the record.

ps If you use a lower-level API, like `NSStream`, you generally do have a way 
to get this info.  Alas, that won’t help if you’re using `NSURLSession`.

Share and Enjoy
--
Quinn "The Eskimo!"                    <http://www.apple.com/developer/>
Apple Developer Relations, Developer Technical Support, Core OS/Hardware


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