WidgetCenter.shared.reloadAllTimelines() doesnt work when app in background

Question

smstefanik OP

Created 4d

Replies 2

Boosts 1

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I have an iOS app, watchOS app, and iOS Widget that shows the most recent data in the database.

The watch app sends data to the iOS app over the WCSession and is received in session(didReceiveMessage, replyHandler). After that data is processed, reloadAllTimelines() is called.

When running in Simulator or on device plugged in to debugger, it works, the widget updates when the app is closed (in background, even if force quit).

But when running TestFlight or App Store build, the data is still processed and saved to Core Data (I open the app and it's there), but the widget doesn't update.

It seems that reloadAllTimelines only works when the app is in foreground (at least in non debug builds). I dont have an iOS 17 device to check but I think this is a recent bug with iOS 18.

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Answer 1

smstefanik OP

4d

Same problem when observing NSNotification.Name.NSCalendarDayChanged

code executes, but reloadAllTimelines doesn't refresh the widget

So I dont think this is related to WatchKit session, it's because the app is in background.

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Answer 2

smstefanik OP

1d

I can also confirm that the same thing is happening when communicating from the app to the watch: the watch app wakes in background to process data from the iPhone app and calls reloadAllTimelines, but the watch face complication does not reload.

I'm guessing this is an iOS 18 bug because I've only heard from my customers in the last few weeks about this.

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