macos - Swift - 每小时使用计时器/系统时钟/后台线程在我的应用程序中执行某些操作

Question

我在用着：

var alarm = NSUserNotification()
var currentTime = NSDate()
alarmTime = currentTime.dateByAddingTimeInterval(60)
alarm.deliveryDate = alarmTime
NSUserNotificationCenter.defaultUserNotificationCenter().scheduleNotification(alarm)

要获得从当前时间开始一小时的通知，问题是我希望应用程序在第一个警报完成后自动设置另一个警报。NSTimer 似乎不起作用，因为一旦应用程序进入后台，它就会终止计时器。我能做些什么来实现这一目标？我可以将另一种方法搭载到 NSUserNotification 上吗

编辑：它也需要是动态的，我不能只设置通知的重复变量，因为我需要能够切换警报每次重置时的距离。

Answer 1

您只需设置您的deliveryRepeatInterval 和deliveryTimeZone，如下所示：

// set your deliveryTimeZone to localTimeZone
alarm.deliveryTimeZone = NSTimeZone.localTimeZone()

// The date components that specify how a notification is to be repeated.
// This value may be nil if the notification should not repeat.
// alarm.deliveryRepeatInterval = nil

// The date component values are relative to the date the notification was delivered.
// If the calendar value of the deliveryRepeatInterval is nil
// the current calendar will be used to calculate the repeat interval.
// alarm.deliveryRepeatInterval?.calendar = NSCalendar.currentCalendar()

// to repeat every day, set .deliveryRepeatInterval.day to 1.
alarm.deliveryRepeatInterval?.day = 1
// to repeat every hour, set .deliveryRepeatInterval.hour to 1.
alarm.deliveryRepeatInterval?.hour = 1

 alarm.deliveryDate = NSDate().dateByAddingTimeInterval(60)

NSUserNotificationCenter.defaultUserNotificationCenter().scheduleNotification(alarm)