如何在 iOS eventKit 中添加事件警报？

Question

我能够使用 iOS eventkit 成功创建一个事件，但该事件在没有警报的情况下保存。是否可以从代码向日历事件添加警报（如 15 分钟前、1 小时前等）？ 这是我当前创建事件的代码

  let eventStore : EKEventStore = EKEventStore()
  // 'EKEntityTypeReminder' or 'EKEntityTypeEvent'
  eventStore.requestAccess(to: .event) { (granted, error) in
      let event:EKEvent = EKEvent(eventStore: eventStore)
      if let title = self.calendarTitle {
        event.title = title  
      } else {
        event.title = "Session"
      }
      let dateFormatter = DateFormatter()
      dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss'Z'"
      let dateStart = dateFormatter.date(from: self.calendarStart)
      let dateEnd =  dateFormatter.date(from: self.calendarEnd)
      event.startDate = dateStart!
      event.endDate = dateEnd!
      event.notes = self.calendarNote
      event.calendar = eventStore.defaultCalendarForNewEvents
      do {
        try eventStore.save(event, span: .thisEvent)
      } catch let error as NSError {
        print("failed to save event with error : \(error)")
      }
      self.alertify(message: "Event saved in Calendar", in: self, success: true)
    }
    else {
      self.alertify(message: "Unable to save", in: self, success: false)
    }
  }

Answer 1

您可以查看 EKAlarm 文档：

EKAlarm Apple doc

您可以使用它的 absoluteDate 属性为您的活动设置闹钟。