CLKComplicationDataSource：getTimelineEntries 委托调用了数百次

【问题标题】：CLKComplicationDataSource: getTimelineEntries delegate called hundreds of timesCLKComplicationDataSource：getTimelineEntries 委托调用了数百次
【发布时间】：2017-02-09 23:49:26
【问题描述】：

我正在尝试在 Watch 应用复杂功能中支持 TimeTravel。 考虑这段代码。

我无法理解为什么这些委托方法会被重复调用，直到我终止应用程序。

我想知道我做错了什么，因为操作系统负责调用这些方法。这是某种 WatchOS 错误吗？

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)
}

控制台日志的一小段摘录：

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

此时，我杀死了应用程序...

【问题讨论】：

    标签： ios watchkit apple-watch-complication time-travel


    【解决方案1】：

    事实证明，委托被调用了太多次，因为我会继续提供同一日期的时间线条目。

    我的代码中有一个错误（此处未显示），负责创建 CLKComplicationTimelineEntry 对象。我没有使用委托提供的日期，而是使用了对 Date() 的调用（显然是从 getCurrentTimelineEntry 方法的实现中复制粘贴的）。

    我觉得令人印象深刻的是，WatchOS 会调用委托 数千次​​trong> 次。

    【讨论】：

    • 好的提示，我有一个类似的问题，它调用了这个委托大约 10 次。我在委托中删除了对 Date() 的调用，现在它仍然调用了这个委托两次。这是正常的还是应该只有一个电话？
    【解决方案2】：

    我找到了另一个原因。您为处理程序返回的条目需要跨越至少 25 小时，否则 getTimelineEntries 将继续调用，直到它获得足够的条目。

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

    【讨论】：

      猜你喜欢
      • 2013-07-10
      • 1970-01-01
      • 2015-04-11
      • 2013-11-22
      • 2011-02-07
      • 1970-01-01
      • 1970-01-01
      • 2012-04-08
      • 2017-05-28
      相关资源
      最近更新 更多
      热门标签
      Java Python linux javascript Mysql C# Docker 算法 前端 SpringBoot Redis Vue spring 设计模式 .net core .net kubernetes c++ 数据库 数据结构 大数据 js 机器学习 微服务 Android Go 程序员 面试 JVM ASP.net core 云原生 人工智能 后端 PHP git CSS golang k8s Nginx Django mybatis 深度学习 多线程 React 架构 devops 爬虫 云计算 Spring Boot LeetCode