Xcode 8 Warning “Instance method nearly matches optional requirement”

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We contacted Apple Developer Technical Support (DTS) with this issue.
They replied that this is a bug in Xcode 8.

We submitted a bug report and hope for a quick update. (Apple Bug Report ID: 28315920).

If you experience a similar issue, please also file a bug report (referring to ours) so the Apple engineers see its not a single case.

Update for Xcode ≥ 8.1

The problem seems fixed now, at least for the delegate methods we are using in our project.

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