如何在ios日历的EKEvent中设置特定的闹钟？

Question

在 EKEvent 中，一旦我没有为事件设置任何警报，我就会在日历应用程序中查看它，它会在 5 分钟前向我显示警报。为什么 ？我不明白。

我的要求

• 我想在给定特定时间之前设置两个警报，1 个警报，例如“5 分钟、15 分钟、30 分钟、1 小时”。需要在事件时间设置2秒警报。

• 在搜索如何在事件中添加警报的基础上，我为添加事件做了一些事情，但它不起作用。很多尝试但在日历中没有效果。

• 请参阅下面的代码，我根据我的要求尝试了两种方式，我使用开关盒，甚至尝试添加单个警报。两者都不起作用。

我该怎么办？

提出任何建议、解决方案、想法

谢谢

       let event:EKEvent = EKEvent(eventStore: appleEventStore)

        event.title = tempDescription
        event.startDate = startDate as Date
        event.endDate = endDate as Date
        event.isAllDay = false
        event.notes = "This is a note"
        event.calendar = cal
        do {
            try appleEventStore.save(event, span: .thisEvent)
            print("events added with dates:")

            let alarm = EKAlarm(relativeOffset: 600)
            event.addAlarm(alarm)

            switch tempalertid {

            case "1":
                let aInterval: TimeInterval = -5 * 60
                let alaram = EKAlarm(relativeOffset: aInterval)
                event.addAlarm(alaram)
            case "2":
                let aInterval: TimeInterval = -15 * 60
                let alaram = EKAlarm(relativeOffset: aInterval)
                event.addAlarm(alaram)
            case "3":
                let aInterval: TimeInterval = -30 * 60
                let alaram = EKAlarm(relativeOffset: aInterval)
                event.addAlarm(alaram)
            case "4":
                let aInterval: TimeInterval = -1 * 60 * 60
                let alaram = EKAlarm(relativeOffset: aInterval)
                event.addAlarm(alaram)

            default:
                break
            }
            if event.hasAlarms {
                print("yes")

            }
            else {
                print("no")
            }

        } catch let e as NSError {
            print(e.description)
            return
        }
        print("Saved Event")

Answer 1

    let event:EKEvent = EKEvent(eventStore: appleEventStore)
    event.title = tempDescription
    event.startDate = startDate as Date
    event.endDate = endDate as Date
    event.isAllDay = false
    event.notes = "This is a note"
    event.calendar = cal


    switch tempalertid {
        case "1":
            let aInterval: TimeInterval = -5 * 60
            let alaram = EKAlarm(relativeOffset: aInterval)
             event.alarms = [alaram]
        case "2":
            let aInterval: TimeInterval = -15 * 60
            let alaram = EKAlarm(relativeOffset: aInterval)
             event.alarms = [alaram]
        case "3":
            let aInterval: TimeInterval = -30 * 60
            let alaram = EKAlarm(relativeOffset: aInterval)
             event.alarms = [alaram]
        case "4":
            let aInterval: TimeInterval = -1 * 60 * 60
            let alaram = EKAlarm(relativeOffset: aInterval)
            event.alarms = [alaram]

        default:
            break
        }

    do {
        try appleEventStore.save(event, span: .thisEvent)
        print("events added with dates:")

    } catch let e as NSError {
        print(e.description)
        return
    }
    print("Saved Event")