johnweeks Why do you use the operation queue to wait for hardware? Why not a background task? John Weeks WaveMetrics, Inc. support@wavemetrics.com Log in or register to post comments December 1, 2017 at 09:12 am - Permalink
John Weeks
WaveMetrics, Inc.
support@wavemetrics.com
December 1, 2017 at 09:12 am - Permalink