WatchOS 2 Complication Scheduled Update In Background

Question

So, after sooo so much testing and online research, I have to give up and ask for help. WatchOS 2 complications.

So I am trying to create a basic complication that shows the time at the time of update.

I am aware that update in background are budgeted so I am attempting to update the time every 10 mins. Hopefully as collecting an NSDate is simple, that won't cause me to go 'over budget' what ever that means.

I am for now ignoring time travel and providing a timeline. Instead I am simply filling out the large module template with the current time in:

func getCurrentTimelineEntryForComplication(complication: CLKComplication, withHandler handler: (CLKComplicationTimelineEntry?) -> Void) {

I then have this:

func getNextRequestedUpdateDateWithHandler(handler: (NSDate?) -> Void){
    handler(NSDate(timeIntervalSinceNow: 60*10));
}

And this:

func requestedUpdateDidBegin(){
    NSLog("requestedUpdateDidBegin")
    let complicationServer = CLKComplicationServer.sharedInstance()
    for complication in complicationServer.activeComplications {
        complicationServer.reloadTimelineForComplication(complication)
    }
}

The update never ever occurs though. Only by launching the extension and running the same code as 4 lines above, can i get the complication to update. From looking at the logs, all that happens after a forced update is that the method getNextRequestedUpdateDateWithHandler gets called but nothing else.

Any suggestions or anything that I am obviously missing? Thanks very much for reading.

Answer 1

I would think you need to implement:

func getCurrentTimelineEntryForComplication(complication: CLKComplication, withHandler handler: ((CLKComplicationTimelineEntry?) -> Void))

The method you have implemented getTimelineEntriesForComplication(complication: CLKComplication, beforeDate... is only called when the complication server is gathering timeline entries for forward time travel.

Given the scenario you describe, I would strongly recommend supporting forward time travel by implementing:

func getSupportedTimeTravelDirectionsForComplication(complication: CLKComplication, withHandler handler: (CLKComplicationTimeTravelDirections) -> Void) {
    handler([.Forward])
}

And

func getTimelineEndDateForComplication(complication: CLKComplication, withHandler handler: (NSDate?) -> Void) {
    let date: NSDate = // Your date
    handler(date)
}