Always on display in fitness app written in WatchKit UI

Question

Created Oct ’21

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Is it possible to update the UI of an application written in WatchKit (not SwiftUI) while the watch is lowered and the device is in always-on mode?

I am wanting to continue to update a WKInterfaceTimer label (which shows minutes and seconds) and a couple of WKInterfaceLabel which show live HealthKit info for a fitness app.

I can't seem to see any Watchkit APIs for this and if I do not pause a WKInterfaceTimer when the didDeactivate is called on a WKInterfaceController the it still seems to pause when the app is put into always on mode.

Answered by Frameworks Engineer in 690164022

No. Your in-session view must be in SwiftUI in order to take advantage of the TimelineView API, which is SwiftUI only.

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Answer 1

Frameworks Engineer OP

Apple

Oct ’21

Recommended

No. Your in-session view must be in SwiftUI in order to take advantage of the TimelineView API, which is SwiftUI only.

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Answer 2

navigator2 OP

Mar ’22

My watch app is writen in Objective C and WatchKit. It is very large with many WKInterfaceControllers. I only need one screen to update in Always-On mode. Rather than recode my entire user interface in SwiftUI is it possible to code just that single screen in SwiftUI and call it from WatchKit?

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