ios - 如何定义 EKRecurrenceRule 来表示 'Every 4 years only on 4th of July'

Question

我试图表示重复规则，

Every 4 years only on 4th of July.

像这样:

termin.addRecurrenceRule(EKRecurrenceRule(recurrenceWithFrequency: .Yearly,
    interval: 4,
    daysOfTheWeek: nil,
    daysOfTheMonth: [NSNumber(int: 4)],
    monthsOfTheYear: [NSNumber(int :7)],
    weeksOfTheYear: nil,
    daysOfTheYear: nil,
    setPositions: nil,
    end: nil))

但是 Apple 文档说:

daysOfTheMonth: The days of the month that the event occurs, as an array of NSNumber objects. Values can be from 1 to 31 and from -1 to -31. This parameter is only valid for recurrence rules of type EKRecurrenceFrequencyMonthly.

那么如何用 EKRecurrenceRule 类表示上述规则？

注意:答案可能在 Swift 或 Objc 中。

Answer 1

创建一个开始日期和结束日期为 7 月 4 日的事件，并为其指定每年重复规则，如下所示:

let event = EKEvent(eventStore: self.eventStore)

event.title = title
event.startDate = fourthOfJulyStartDate
event.endDate = fourthOfJulyEndDate
event.recurrenceRules = [EKRecurrenceRule(recurrenceWithFrequency: .Yearly, interval: 4, end: nil)]