In my app, i want to add local notifications. The scenario will be that the user can select any time and days from Mon to Sun. For example, if the user selects Mon, Thur and Sat as days and time as 11:00 pm, so now the user should be notified at all the selected days and that particular time.
Code:
let notification = UNMutableNotificationContent()
notification.title = "Danger Will Robinson"
notification.subtitle = "Something This Way Comes"
notification.body = "I need to tell you something, but first read this."
let notificationTrigger = UNTimeIntervalNotificationTrigger(timeInterval: 60, repeats: true)
// let test = UNCalendarNotificationTrigger()
let request = UNNotificationRequest(identifier: "notification1", content: notification, trigger: notificationTrigger)
UNUserNotificationCenter.current().add(request, withCompletionHandler: nil)
I am using this code but this doesn't work according to what I need.
To get local notifications that repeat on a certain weekday at a certain time you can use a UNCalendarNotificationTrigger:
let notification = UNMutableNotificationContent()
notification.title = "Danger Will Robinson"
notification.subtitle = "Something This Way Comes"
notification.body = "I need to tell you something, but first read this."
// add notification for Mondays at 11:00 a.m.
var dateComponents = DateComponents()
dateComponents.weekday = 2
dateComponents.hour = 11
dateComponents.minute = 0
let notificationTrigger = UNCalendarNotificationTrigger(dateMatching: dateComponents, repeats: true)
let request = UNNotificationRequest(identifier: "notification1", content: notification, trigger: notificationTrigger)
UNUserNotificationCenter.current().add(request, withCompletionHandler: nil)
If you want notifications on Monday, Thursday and Saturday at 11:00 you need to add 3 separate requests. To be able to remove them you have to keep track of the identifiers.
Related
Im trying to make an app and at 9am I want to call a function and send an a notification. Then another at 12pm, and another at 6pm. Everyday. Does anyone know the best way how?
Use a UNCalendarNotificationTrigger :
var dateComponents = DateComponents()
dateComponents.hour = 9
dateComponents.minute = 0
let trigger = UNCalendarNotificationTrigger(dateMatching: dateComponents,
repeats: true)
let request = UNNotificationRequest(identifier: UUID().uuidString,
content: YourContent,
trigger: trigger)
i would like to send a notification to my iOS application users just a day following the registration of the notification. In other words, i want to exclude the day of the registration of the notification in the UNUserNotificationCenter (I want to send the notification everyday from tomorrow on).
var dateInfo = DateComponents()
dateInfo.hour = 12
dateInfo.minute = 30
let content = UNMutableNotificationContent()
content.title = NSString.localizedUserNotificationString(forKey: "daily notification:", arguments: nil)
content.body = NSString.localizedUserNotificationString(forKey: "Hello ！Get up,", arguments: nil)
content.sound = UNNotificationSound.default()
content.badge = UIApplication.shared.applicationIconBadgeNumber + 1 as NSNumber;
content.categoryIdentifier = "Daily notification"
// Deliver the notification every day at 12:30 am.
let trigger = UNCalendarNotificationTrigger(dateMatching: dateInfo, repeats: false)
let request = UNNotificationRequest.init(identifier: "midnoonHalfNotification", content: content, trigger: trigger)
Calculate the time interval between now (when the request is created) and 12:30 tomorrow and use a UNTimeIntervalNotificationTrigger as the trigger with the calculated interval instead of the calendar trigger.
In the app I'm developing, there is an option for triggering notification x amount of time before the actual time set for the said notification. For example I set the reminder for 10:00. But in the app's local settings, I set the notification to trigger 10 minutes before the time set. So, in this example's case, the notification will trigger in 9:50.
Now, I can do the above when I'm setting time for individual notification. But what I want to do is trigger all pending notifications before the actual time set for it.
This is the function I'm using to set notifications:
func scheduleNotification(at date: Date, identifier: String, threadIdentifier: String, body: String) {
let calendar = Calendar(identifier: .gregorian)
let components = calendar.dateComponents(in: .current, from: date)
let newComponents = DateComponents(calendar: calendar, timeZone: .current, year: components.year, month: components.month, day: components.day, hour: components.hour, minute: components.minute)
let trigger = UNCalendarNotificationTrigger(dateMatching: newComponents, repeats: false)
let content = UNMutableNotificationContent()
content.title = "TestNotification"
content.body = body
content.threadIdentifier = threadIdentifier
content.sound = UNNotificationSound.default()
let request = UNNotificationRequest(identifier: identifier, content: content, trigger: trigger)
UNUserNotificationCenter.current().add(request) {
error in
if let error = error {
print("Error in delivering notification. Error: \(error.localizedDescription)")
}
}
}
The date is coming from the date set by the date picker. I tried to change trigger properties by using this code:
UNUserNotificationCenter.current().getPendingNotificationRequests { (requests) in
for request in requests {
request.trigger = UNTimeIntervalNotificationTrigger(timeInterval: 10*60, repeats: false)
}
}
But now I get an error saying 'trigger' is a get-only property.
There is no way to change fire time of a scheduled notification , you can remove all of them and re-schedule again
What I want that, I set the local notification for 7:00 am and as its fire immediately, notification comes continuously till the user not perform any action on notification or open the app.
below is code to send notification first time
let alarmNotification: UNMutableNotificationContent = UNMutableNotificationContent()
alarmNotification.title = "Demo"
alarmNotification.body = "Test"
alarmNotification.categoryIdentifier = "myDemoCategory"
let now = Date()
let triggerWeekly = Calendar.current.dateComponents([.weekday,.hour,.minute], from: now)
let trigger = UNCalendarNotificationTrigger(dateMatching: triggerWeekly, repeats: true)
let request = UNNotificationRequest(identifier: "TestNotification\(now)", content: alarmNotification, trigger: trigger)
UNUserNotificationCenter.current().add(request) {(error) in
if let error = error {
print("Uh oh! We had an error: \(error)")
}
}
Please suggest for continuous send local notification.
Thanks
In your date component add seconds here
let triggerWeekly = Calendar.current.dateComponents([.weekday,.hour,.minute], from: now)
set number of notifications you want in loop for every second by incrementing seconds Max is 64 in iOS.
when notification is tapped dismiss all notifications and reset for next time.
I've noticed that if I create an UNCalendarNotificationTrigger with a custom date it does't get added unless i put:
let trigger = UNCalendarNotificationTrigger(dateMatching: components, repeats: **true**)
Apple Example is:
let date = DateComponents()
date.hour = 8
date.minute = 30
let trigger = UNCalendarNotificationTrigger(dateMatching: date, repeats: true)
which make sense to be repeats == true.
In my scenario I dont need to create one notification that gets repeated many times, but I need multiple notificaitons fired only once on a specific calendar date (which is of course in the future)..
If I'm doing:
let calendar = Calendar(identifier: .gregorian)
let formatter = DateFormatter()
formatter.dateFormat = "yyyyMMdd"
let newdate = formatter.date(from: "20161201")
let components = calendar.dateComponents(in: .current, from: newdate!)
let trigger = UNCalendarNotificationTrigger(dateMatching: components, repeats: false)
then i always get 0 pending notifications...
UNUserNotificationCenter.current().getPendingNotificationRequests(completionHandler: { (notifications) in
print("num of pending notifications \(notifications.count)")
})
num of pending notification 0
Any idea?
EDIT1:
Adding other context as pointed out by one of the answers.
I'm actually adding the request to the current UNUserNotificationQueue.
let request = UNNotificationRequest(identifier: "future_calendar_event_\(date_yyyyMMdd)", content: content, trigger: trigger)
UNUserNotificationCenter.current().add(request) { error in
if let error = error {
// Do something with error
print(error.localizedDescription)
} else {
print("adding \((request.trigger as! UNCalendarNotificationTrigger).dateComponents.date)")
}
}
I have the same problem and I solve it now. It is due to dateComponents' year.
In order to solve this problem, I test the following code:
1.
let notificationCenter = UNUserNotificationCenter.current()
let notificationDate = Date().addingTimeInterval(TimeInterval(10))
let component = calendar.dateComponents([.year,.day,.month,.hour,.minute,.second], from: notificationDate)
print(component)
let trigger = UNCalendarNotificationTrigger(dateMatching: component, repeats: false)
let request = UNNotificationRequest(identifier: item.addingDate.description, content: content, trigger: trigger)
self.notificationCenter.add(request){(error) in
if let _ = error {
assertionFailure()
}
}
In console, print component:
year: 106 month: 2 day: 14 hour: 12 minute: 3 second: 42 isLeapMonth: false
And in this case, the notification cannot be found in pending notification list.
2.When I set component's year explicitly to 2017:
let notificationDate = Date().addingTimeInterval(TimeInterval(10))
var component = calendar.dateComponents([.year,.day,.month,.hour,.minute,.second], from: notificationDate)
component.year = 2017
print(component)
let trigger = UNCalendarNotificationTrigger(dateMatching: component, repeats: false)
let request = UNNotificationRequest(identifier: item.addingDate.description, content: content, trigger: trigger)
self.notificationCenter.add(request){(error) in
if let _ = error {
assertionFailure()
}
}
In console, the component is:
year: 2017 month: 2 day: 14 hour: 12 minute: 3 second: 42 isLeapMonth: false
Then this notification can be found in pending notification list.
And next, I check in the pending notification requests to find whether the trigger-date's year component is 106 or 2017:
notificationCenter.getPendingNotificationRequests(){[unowned self] requests in
for request in requests {
guard let trigger = request.trigger as? UNCalendarNotificationTrigger else {return}
print(self.calendar.dateComponents([.year,.day,.month,.hour,.minute,.second], from: trigger.nextTriggerDate()!))
}
}
I find the trigger's nextTriggerDate components are:
year: 106 month: 2 day: 14 hour: 12 minute: 3 second: 42 isLeapMonth: false
Conclusion
So if you want to set the trigger's repeats to false, you should make sure the trigger date is bigger than current date.
The default dateComponents' year may be unsuitable, such as 106. If you want the notification to fire in 2017, you should set the components year to 2017 explicitly.
Perhaps this is a bug, because I set trigger's dateComponents' year to 2017 but get 106 in nextTriggerDate of pending notification request.
On my app, I request permission after notification set by mistake. So If I want to get pending notification count, I got 0.
I requested permission on AppDelegate but notifications setted on first view viewdidload(). I added a notification function to trigger with button. After get permission click button and finally setted my notification and I got pending notification count 1.
I hope that's will help you.
UNCalendarNotificationTrigger creates the schedule for which a notification should occur, but it does not do the scheduling. For this you need to create a UNNotificationRequest and then add this to the notification center. Something along the lines of:
let request = UNNotificationRequest(identifier: "MyTrigger", content: content, trigger: trigger)
UNUserNotificationCenter.current().add(request) { error in
if let error = error {
// Do something with error
} else {
// Request was added successfully
}
}