如何在最小化应用iOS时推送每个特定N天的本地通知？

Question

如何在特定的N天从DB获取特定时间（例如：上午9:00）的本地通知。我尝试使用计时器来添加通知，但是当我最小化应用程序时，看起来似乎是计时器。这是我的代码：

func createTriggerLocalPushNotification(completion: @escaping(Error?) -> ()) {

    var date = Date()
    date.hour = 12
    date.minute = 0
    date.second = 0
    var timeInterval = 86400 * 3 // Default 3 day
    var timeBuffer:TimeInterval = 0
    guard let inActivePushString = RealmUserInfo.shared.getValue(with: keyInActiveTimePush),
        let inActivePushTime = Int(inActivePushString), inActivePushTime > 0 else {
        log.info("Can't trigger inActivePushTime")
            return
    }

    date.add(.day, value: inActivePushTime)

    if #available(iOS 10.0, *) {
        timeInterval = 86400 * inActivePushTime
        timeBuffer = date.timeIntervalSinceNow

        let content = UNMutableNotificationContent()
        content.body = self.contentMessage
        content.sound = UNNotificationSound.default
        content.categoryIdentifier = self.inActiveTimePushNotificationCategory

        // Buffer trigger when first time
        var dateComponents = DateComponents()
        dateComponents.day = Date().day + inActivePushTime
        dateComponents.hour = 12
        dateComponents.minute = 0
        let firstTrigger = UNCalendarNotificationTrigger(dateMatching: dateComponents, repeats: false)
        let requestBuffer = UNNotificationRequest(identifier: self.bufferInActiveTimePushNotification, content: content, trigger: firstTrigger)
        UNUserNotificationCenter.current().add(requestBuffer, withCompletionHandler: nil)

        // Create content
        Timer.scheduledTimer(withTimeInterval: timeBuffer, repeats: false) { (timer) in
            // Create trigger
            let trigger = UNTimeIntervalNotificationTrigger(timeInterval: TimeInterval(timeInterval), repeats: true)
            let request = UNNotificationRequest(identifier: self.inActiveTimePushNotification, content: content, trigger: trigger)
            UNUserNotificationCenter.current().add(request, withCompletionHandler: nil)
            }
        completion(nil)
    } else {
        // Fallback on earlier versions
        let content = UILocalNotification()
        content.alertBody = contentMessage
        content.soundName = UILocalNotificationDefaultSoundName
        content.category = inActiveTimePushNotification
        content.fireDate = date
        content.repeatInterval = .day
        UIApplication.shared.scheduleLocalNotification(content)
        completion(nil)
    }
}

Answer 1

在3天之后设置本地推送通知，具体时间如下午10:00，当用户打开应用程序时或者每次我们可以获得applicationDidBecomeActive委托方法时只需在前台输入应用程序，在此方法中，如果存在，则需要删除旧的本地推送通知在特定时间后3天后重置。

请参阅此帖子以设置N天的本地推送通知。 Repeating local notifications for specific days of week (Swift 3 IOS 10)