2

I am trying to support TimeTravel in a Watch app Complication. Consider this code.

I cannot understand why these delegate methods are called repeatedly, until I kill the app.

I wonder what I could be doing wrong, since the OS is responsible for calling these methods. Is this some kind of WatchOS bug?

func getTimelineEntries(for complication: CLKComplication, after date: Date, limit: Int, withHandler handler: @escaping ([    CLKComplicationTimelineEntry]?) -> Void) {
    // Call the handler with the timeline entries after to the given date

    let interval = stride(from:0.0, through:60, by: 10.0)

    var entries: [CLKComplicationTimelineEntry]? = nil

    switch complication.family {

    case .circularSmall:
        entries = interval.flatMap({ minutes in
            entryForCircularSmall(date: date.addingTimeInterval(60.0 * minutes) )
        })
        handler(entries)

    case .utilitarianLarge:
        entries = interval.flatMap({ minutes in
            entryForUtilitarianLarge( date: date.addingTimeInterval(60.0 * minutes) )
        })

        handler(entries)

    default:
        handler(nil)
    }

    print("future timelineEntries limit: \(limit), date: \(date), entries: \(entries?.count)")
}

func getTimelineEndDate(for complication: CLKComplication, withHandler handler: @escaping (Date?) -> Void) {
    let date = Date().addingTimeInterval(60.0 * Double(240))
    print("timeline end: \(date)")
    handler(date)
}

Small excerpt from the console log:

timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:32:59 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:09 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:09 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000
future timelineEntries limit: 100, date: 2017-02-09 23:33:10 +0000, entries: Optional(7)
timeline end: 2017-02-10 03:33:10 +0000

At this point, I kill the app...

Nick Kanellopoulos
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2 Answers2

0

As it turns out, the delegate was called too many times, because I would keep supplying timeline entries for the same date.

I had a bug in my code (not shown here) responsible for creating the CLKComplicationTimelineEntry objects. Instead of using the date supplied by the delegate, I was using a call to Date() (apparently copy-pasted from the implementation of the getCurrentTimelineEntry method).

I find impressive however that WatchOS would call the delegate thousands of times.

Nick Kanellopoulos
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  • Good tip, I had a similar issue that was invoking this delegate about 10 times. I removed calling to Date() within the delegate, and now it still calls this delegate twice. Is that normal or should it only be one call? – alamodey Oct 14 '21 at 23:00
0

I find another cause for this. The entries you return for the handler needs to span at least 25 hours, otherwise the getTimelineEntries will keep calling until it gets enough entries.

func getTimelineEntries(for complication: CLKComplication, after date: Date, limit: Int, withHandler handler: @escaping ([CLKComplicationTimelineEntry]?) -> Void) {
    var entries: [CLKComplicationTimelineEntry] = // .... some code
    handler(entries)
}
Phil Dukhov
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luomein
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