如何获取 EKEvent 实例的 travelTime

Question

我想获取日历事件 (EKEvent) 的旅行时间，但出现此错误：Value of type 'EKEvent' has no member 'travelTime'。

当我打印 EKEvent 时，我得到这个：

EKEvent <0x79f6f460>
{
     EKEvent <0x79f6f460>
{    title =        Test; 
     location =     Foobar; 
     calendar =     EKCalendar <0x7ba6f9a0> {title = Calendar; type = Local; allowsModify = NO; color = #1BADF8;}; 
     alarms =       (null); 
     URL =          (null); 
     lastModified = 2016-04-25 17:56:58 +0000; 
     startTimeZone =    Europe/Amsterdam (GMT+2) offset 7200 (Daylight); 
     startTimeZone =    Europe/Amsterdam (GMT+2) offset 7200 (Daylight) 
}; 
     location =     Foobar; 
     structuredLocation =   EKStructuredLocation <0x79e722e0> {title = Foobar; address = (null); geo = (null); abID = (null); routing = (null); radius = 0.000000;}; 
     startDate =    2016-04-25 19:15:00 +0000; 
     endDate =      2016-04-25 20:15:00 +0000; 
     allDay =       0; 
     floating =     0; 
     recurrence =   (null); 
     attendees =    (null); 
     travelTime =   30 minutes; 
     startLocation =    (null);
};

有人知道发生了什么事吗？（我可以访问 startDate 的标题之类的东西）

Answer 1

这似乎return以秒为单位的旅行时间属性：

 let travelTime = yourEKEvent.valueForKey("travelTime")!

显然 EKEvent class 中没有可访问的 travelTime 属性所以我猜它在它的超级 classes 中的某个地方。在内置的 iOS 日历中，当您向事件添加旅行时间时，选项的详细信息如下：

Event alerts will take this time into account and your calendar will be blocked during this time

查看EKAlarms 文档后，我认为它可能存储在relativeOffset 属性中。警报应存储在 EKCalendar super class 中。

也可以通过设置值的方式更新数值：

yourEKEvent.setValue(300, forKey: "travelTime")

然后使用如下方法重新保存事件：

    func updateEvent(event: EKEvent)
{
    do {
        try eventStore.saveEvent(event, span: .ThisEvent)
        savedEventId = event.eventIdentifier

    } catch {
        print("Bad things happened")
    }
}

如何获取 EKEvent 实例的 travelTime

How to get the travelTime of an EKEvent instance

eventkit

ekevent

ekeventstore

swift