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我正在尝试了解如何在每天重复本地通知时更新消息。

目前我的 AppDelegate 中有以下代码:

func scheduler(at date: Date, numOfNotes: Int)
{
    let calendar = Calendar(identifier: .gregorian)

    let components = calendar.dateComponents(in: .current, from: date)

    let newComponents = DateComponents(calendar: calendar, timeZone: .current, hour: components.hour, minute: components.minute)

    let trigger = UNCalendarNotificationTrigger(dateMatching: newComponents, repeats: true)

    content.badge = numOfNotes as NSNumber

    content.body = "REMINDER: " + String(numOfNotes) + " needs to be looked at!"

    content.sound = UNNotificationSound.default()

    let request = UNNotificationRequest(identifier: "reminderNotification", content: content, trigger: trigger)

    UNUserNotificationCenter.current().delegate = self

    UNUserNotificationCenter.current().add(request) {(error) in

    }
}

我存储numOfNotesUserDefaults. 我的 中有一个,UISwitchUITableViewCell打开时调用该scheduler函数,如下所示:

func remindMeSwitch(_ remindMeSwitch: UISwitch)
{   
    numOfNotes = UserDefaults.standard.integer(forKey: "Notes")

    let delegate = UIApplication.shared.delegate as? AppDelegate

    delegate?.scheduler(at: time, numOfNotes: numOfNotes)
}

但是,当将repeats参数设置true为让通知在指定时间每天重复时,numOfNotes只会调用一次,即当我UISwitch打开时。

如何将通知设置为每天提醒,但仍可以根据需要更新通知消息?

谢谢。

4

1 回答 1

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一般来说,您不可能更改本地通知。只有一种方法 - 删除/取消旧通知并创建新通知。但是您可以使用复制功能。

例如,如果您想更改通知的内容:

// create new content (based on old)
if let content = notificationRequest.content.mutableCopy() as? UNMutableNotificationContent {
    // any changes    
    content.title = "your new content's title"
    // create new notification
    let request = UNNotificationRequest(identifier: notificationRequest.identifier, content: content, trigger: notificationRequest.trigger)
    UNUserNotificationCenter.current().add(request)
}
于 2017-04-12T21:16:25.323 回答