Possible to disable 1hz watchface updates?

Hi, users of my watchface (with 1hz support) write me, that they'd like to be able to disable 1hz mode in settings to save battery. How would I do that?

As I understand, once I create the watchface view with onPartialUpdate, it will get called every second. Is there a way to tell the OS 'please stop calling onPartialUpdate'?

(Of course, I could just skip drawing in onPartialUpdate, but then the device will still need to wake up every second just to run an empty function).

Thanks!

jim_m_58 over 7 years ago

That's the way to do it. Just a quick return in onPartialUpdate without doing anything. It would be close to not having onPartialUpdate at all as you skip the things that use battery - like the screen update.

tomaskafka over 7 years ago

Thanks!

jim_m_58 over 7 years ago

The quick return is also a good way to see how things work on devices without 1hz, or in the event of exceeding the power budget (when onPartialUpdate is no longer called). You may find you need to use the same flag in onUpdate so you don't do things assuming onPartialUpdate will be running (like always display seconds at the top of a minute). In watchfaces, I treat a user turning off second in the same way as if the delegate for exceeding the power budget was called.