CLKComplicationDataSource: делегат getTimelineEntries вызывается сотни раз

Я пытаюсь поддержать TimeTravel в усложнении приложения Watch. Рассмотрим этот код.

Я не могу понять, почему эти методы делегата вызываются повторно, пока я не убью приложение.

Интересно, что я мог делать неправильно, так как за вызов этих методов отвечает ОС. Это какая-то ошибка WatchOS?

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)
}

Небольшой отрывок из лога консоли:

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    

В этот момент я убиваю приложение...


person Nick Kanellopoulos    schedule 09.02.2017    source источник


Ответы (1)


Как оказалось, делегат вызывался слишком много раз, потому что я продолжал предоставлять записи временной шкалы для одной и той же даты.

В моем коде была ошибка (здесь не показана), ответственная за создание объектов CLKComplicationTimelineEntry. Вместо использования даты, предоставленной делегатом, я использовал вызов Date() (очевидно, скопированный из реализации метода getCurrentTimelineEntry).

Однако меня впечатляет то, что WatchOS вызывает делегата тысячи раз.

person Nick Kanellopoulos    schedule 10.02.2017