iOS 10 周的每个特定日期重复 UserNotification

Question

我正在为 iOS 10 开发本地通知调度模块，例如每周日或每周一等重复本地通知。假设我为这个日期安排了一个通知，它是 2016-12-27 10:53:22 +0000 并使用 UNCalendarNotificationTrigger 且重复值等于 true，该日期的通知被触发，并且下周不会重复时间。

这可能是什么原因？以及如何在 iOS 10 中的特定日期每周重复一次。

创建本地通知的代码如下：

 let content = UNMutableNotificationContent()
 content.title = object.title
 content.body = object.body
 content.sound = UNNotificationSound.default()

 let date = object.fireDate
 let triggerDate =  Calendar.current.dateComponents([.year,.month,.day,.hour,.minute,.second,], from: date as Date)

 let trigger = UNCalendarNotificationTrigger(dateMatching: triggerDate,
                                                            repeats: true)
 // Swift
 let identifier = object.id
 let request = UNNotificationRequest(identifier: identifier,
                                                    content: content, trigger: trigger)
 localNotification.add(request, withCompletionHandler: { (error) in

  if error != nil  {
   // Something went wrong
   print(error!)

   }else {

   print("Reminder \(object.id) has been added successfully at \(object.fireDate)")
   }
})

更新：

我还发现在该日期触发通知后，我要检查是否不存在更多未决通知或检查它是否已重新安排。实际上 repeat 等于 true，下周还没有安排。

UNUserNotificationCenter.current().getPendingNotificationRequests(completionHandler: { (notficiations) in

            for localNotification in notficiations {

                print(localNotification)

            }
        })

结果是：

<UNNotificationRequest: 0x174223ca0; identifier: A1, content: <UNNotificationContent: 0x1742e2980; title: My Title, subtitle: (null), body: My Body, categoryIdentifier: , launchImageName: , peopleIdentifiers: (
), threadIdentifier: , attachments: (
), badge: (null), sound: <UNNotificationSound: 0x1740b1820>, hasDefaultAction: YES, shouldAddToNotificationsList: YES, shouldAlwaysAlertWhileAppIsForeground: NO, shouldLockDevice: NO, shouldPauseMedia: NO, isSnoozeable: NO, fromSnooze: NO, darwinNotificationName: (null), darwinSnoozedNotificationName: (null), trigger: <UNCalendarNotificationTrigger: 0x174223cc0; dateComponents: <NSDateComponents: 0x17415e140>
    Calendar Year: 2016
    Month: 12
    Day: 27
    Hour: 14
    Minute: 46
    Second: 15, repeats: YES>>

我不知道它是否真的是 iOS 中的错误。

Answer 1

触发日期格式不适合在一周中的某一天重复通知。您当前的触发日期组成部分包括年、月、日等，因此此通知会在该特定月份的每年重复，并且 day.Change 如下所述的触发日期会在一周中的某一天重复通知。

 let triggerDate =  Calendar.current.dateComponents([.weekday,.hour,.minute], from: date as Date)

Answer 2

这是应该有效的方法：

func addNotificationForAlarm(alarm: MyAlarm) {

    let myAlarmNotifContent = UNMutableNotificationContent()
    myAlarmNotifContent.title = "Reminder"
    myAlarmNotifContent.body = alarm.activity
    myAlarmNotifContent.sound = UNNotificationSound.default()

    if alarm.repeatDays.count == 1 {

    } else {

        for index in 1...alarm.repeatDays.count {
            createNotif(date: alarm.date, weekDay: index, content: myAlarmNotifContent)
        }
    }

}

private func createNotif(date: Date, weekDay: Int, content: UNNotificationContent) {

    var dateComponent = DateComponents()
    dateComponent.weekday = weekDay
    dateComponent.hour = Calendar.current.dateComponents([.hour], from: date).hashValue
    dateComponent.minute = Calendar.current.dateComponents([.minute], from: date).hashValue

    let myAlarmTrigger = UNCalendarNotificationTrigger(dateMatching: dateComponent, repeats: true)

    setupNotificationSettings()

    let identifier = "Your-Notification"
    let request = UNNotificationRequest(identifier: identifier, content: content, trigger: myAlarmTrigger)
    let center = UNUserNotificationCenter.current()
    center.add(request, withCompletionHandler: { (error) in
        if error != nil {
            //TODO: Handle the error
        }
    })
}

基本上，我发现您可以为希望触发警报的每一天设置单独的通知。例如，您想要每个星期一和每个星期二，因此为每一天创建一个日期组件并将其添加到触发器中。它并不完美，但我认为这是一个比计算时间间隔更好的解决方案。

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