[英]Get the Calendar Color from EKEvent in Swift
In Apple's EventKit each Calendar can have a user-definable color, which can also be accessed on the EKCalendar instance as EKCalendar.color
.在 Apple 的 EventKit 中,每个日历都可以有一个用户可定义的颜色,也可以在 EKCalendar 实例上以
EKCalendar.color
的形式访问。 How can that color be accessed from a single event (not a calendar)?如何从单个事件(而不是日历)访问该颜色? Is there any back-reference from an EKEvent instance to the EKCalendar the event belongs to?
从 EKEvent 实例到事件所属的 EKCalendar 是否有任何反向引用?
As an example, I have a list of calendars and fetch events by start and end date.例如,我有一个日历列表,并按开始和结束日期获取事件。 In the resulting array of events it seems any information answering a question " from which calendar a single event is " got lost.
在由此产生的事件数组中,似乎任何回答“单个事件来自哪个日历”的问题的信息都丢失了。
import EventKit
let eventStore = EKEventStore()
let calendars: [EKCalendar] = getCalendars() // get some calendars here
let d = (start: Date(), end: Date().addingTimeInterval(3600*5)) // [now, now+5h]
let predicate = eventStore.predicateForEvents(withStart: d.start, end: d.end, calendars: calendars)
let events = eventStore.events(matching: predicate) // fetch the events
for event in events { // iterate over all events from calendars within [now, now+5h]
// ?? how to get the color of the calendar of event? or
// ?? how to get the EKCalendar instance event is from?
}
It looks like EKEvent is a subclass of EKCalendarItem .看起来EKEvent是EKCalendarItem的子类。 The
EKCalendarItem
contains a property, calendar
. EKCalendarItem
包含一个属性calendar
。
That being said, here's the answers to the questions话虽如此,这是问题的答案
...
for event in events { // iterate over all events from calendars within [now, now+5h]
// ?? how to get the color of the calendar of
let color = event.calendar.color
// ?? how to get the EKCalendar instance event is from?
let calendar = event.calendar
}
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