How to update the daily local notification message in iOS 10? - ios

Question

I'm trying to find out how to update the message in the local notifications when it is repeated daily.
Currently I have the following code in my AppDelegate:
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
}
}
I am storing numOfNotes in UserDefaults. I have a UISwitch in my UITableViewCell, that upon being switched on calls the scheduler function like so:
func remindMeSwitch(_ remindMeSwitch: UISwitch)
{
numOfNotes = UserDefaults.standard.integer(forKey: "Notes")
let delegate = UIApplication.shared.delegate as? AppDelegate
delegate?.scheduler(at: time, numOfNotes: numOfNotes)
}
However, when setting the repeats parameter to true to have the notification repeat daily at the specified time, numOfNotes is only called once, which is when I toggle the UISwitch on.
How can I set the notification to alert daily but still be able to update the notification message as needed?
Thanks.

Answer 1

In general, you don't have any possibility to change Local Notifications.
Only one way - delete/cancel the old notification and create the new notification. But you can use a copy function.
For example, if you want to change the notification's content:
// 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)
}