I have this function below:
#objc func decrementBadges(){
let center = UNUserNotificationCenter.current()
center.getPendingNotificationRequests(completionHandler: { (notifications) in
print("count", notifications.count)
for notification in notifications{
//center.removePendingNotificationRequests(withIdentifiers: notification.title)
print(notification.content.badge)
print(notification.description)
}
})
}
I am trying to decrement the badge numbers on all the pending notifications. Is this possible? The notification.content.badge is read only and I can't figure out a way to set it.
What you will probably have to do is to cancel the notifications that you want to change and then schedule new ones with the new badge numbers. You can do this by getting the UNNotificationRequest identifiers from each of the notifications in that array you have and then calling center.removePendingNotificationRequests(withIdentifiers: [request, identifiers, of, notifications, to, remove])
Then schedule the updated notifications.
The documentation for UNNotificationRequest.identifier does say
If you use the same identifier when scheduling a new notification, the system removes the previously scheduled notification with that identifier and replaces it with the new one.
So you shouldn't have to remove them first, but that's up to you.
#objc func decrementBadges(eventId: String){
let center = UNUserNotificationCenter.current()
var arrayOfNotifications: [UNNotificationRequest] = []
center.getPendingNotificationRequests(completionHandler: { (notifications) in
print("notifications.count", notifications.count)
for notification in notifications{
print(notification.description)
let content = UNMutableNotificationContent()
content.title = notification.content.title
content.subtitle = notification.content.subtitle
content.body = notification.content.body
content.sound = notification.content.sound
content.userInfo = notification.content.userInfo
content.categoryIdentifier = notification.content.categoryIdentifier
if notification.content.badge != nil {
var int : Int = Int(notification.content.badge!)
int -= 1
content.badge = NSNumber(value: int)
}
let infoDict = content.userInfo as NSDictionary
let notificationId:String = infoDict.object(forKey: "IDkey") as! String
if notificationId != eventId {
let request = UNNotificationRequest(
identifier: notification.identifier,
content: content,
trigger: notification.trigger
)
arrayOfNotifications.append(request)
}
}
})
self.clearNotifications()
for notification in arrayOfNotifications {
UNUserNotificationCenter.current().add(
notification, withCompletionHandler: nil)
}
}
Related
I have a local notification and the text on it could go upto 2 lines. The text shows truncated on the banner. Is it possible to word wrap the text on the notification banner without "\n"? I am not seeing any API's to do it.
Here is my code within a func which takes input params for identifier, body, trigger, userInfo, category:
let content = UNMutableNotificationContent()
content.title = "This is a very very long title text going upto 2 lines. Want to display it in word wrap."
content.subtitle = "This is subtitle text"
content.body = body
content.sound = .default
if let userInfo = userInfo {
content.userInfo = userInfo
}
if let category = category {
content.categoryIdentifier = category.identifier
}
let notification = UNNotificationRequest(identifier: identifier, content: content, trigger: trigger)
log.info("Scheduling notification: id='\(identifier)', content='\(title)'")
UNUserNotificationCenter.current().add(notification, withCompletionHandler: { (error) in
if let error = error {
log.error("Failed to schedule local notification: \(error)")
}
})
In my app, a user will set date and time for reminder, and the phone needs to send local notification at that particular time even when the app is closed.
Able to send a notification at particular time using the below method. but it doesn't work when app is closed:
public func simpleAddNotification(hour: Int, minute: Int, identifier: String, title: String, body: String) {
// Initialize User Notification Center Object
let center = UNUserNotificationCenter.current()
// The content of the Notification
let content = UNMutableNotificationContent()
content.title = title
content.body = body
content.sound = .default
content.badge = 1
// The selected time to notify the user
var dateComponents = DateComponents()
dateComponents.calendar = Calendar.current
dateComponents.hour = hour
dateComponents.minute = minute
// The time/repeat trigger
let trigger = UNCalendarNotificationTrigger(dateMatching: dateComponents, repeats: true)
// Initializing the Notification Request object to add to the Notification Center
let request = UNNotificationRequest(identifier: identifier, content: content, trigger: trigger)
// Adding the notification to the center
center.add(request) { (error) in
if (error) != nil {
print(error!.localizedDescription)
}
}
}
I am using UserNotification framework in my app and sending local notifications (not push notifications), and I want to set the badge to the number of notifications received so what I did was to set the number of notifications received into a user default then I tried to assign the value to the badge to get me a badge number but the badge number would not increase. This is my code below
To set value of received notification
center.getDeliveredNotifications { notification in
UserDefaults.standard.set(notification.count, forKey: Constants.NOTIFICATION_COUNT)
print("notification.count \(notification.count)")
print(".count noti \(UserDefaults.standard.integer(forKey: Constants.NOTIFICATION_COUNT))")
}
This accurately prints the number of notification received and when I decided to set it to my badge it only shows 1
content.badge = NSNumber(value: UserDefaults.standard.integer(forKey: Constants.NOTIFICATION_COUNT))
I have no idea why the value does not increase every time. Any help would be appreciated.
Or if it is possible to always update the badge anywhere in the app.
Send the local notifications like so:
func sendNotification(title: String, subtitle: String, body: String, timeInterval: TimeInterval) {
let center = UNUserNotificationCenter.current()
center.getPendingNotificationRequests(completionHandler: { pendingNotificationRequests in
//Use the main thread since we want to access UIApplication.shared.applicationIconBadgeNumber
DispatchQueue.main.sync {
//Create the new content
let content = UNMutableNotificationContent()
content.title = title
content.subtitle = subtitle
content.body = body
//Let's store the firing date of this notification in content.userInfo
let firingDate = Date().timeIntervalSince1970 + timeInterval
content.userInfo = ["timeInterval": firingDate]
//get the count of pending notification that will be fired earlier than this one
let earlierNotificationsCount: Int = pendingNotificationRequests.filter { request in
let userInfo = request.content.userInfo
if let time = userInfo["timeInterval"] as? Double {
if time < firingDate {
return true
} else {
//Here we update the notofication that have been created earlier, BUT have a later firing date
let newContent: UNMutableNotificationContent = request.content.mutableCopy() as! UNMutableNotificationContent
newContent.badge = (Int(truncating: request.content.badge ?? 0) + 1) as NSNumber
let newRequest: UNNotificationRequest =
UNNotificationRequest(identifier: request.identifier,
content: newContent,
trigger: request.trigger)
center.add(newRequest, withCompletionHandler: { (error) in
// Handle error
})
return false
}
}
return false
}.count
//Set the badge
content.badge = NSNumber(integerLiteral: UIApplication.shared.applicationIconBadgeNumber + earlierNotificationsCount + 1)
let trigger = UNTimeIntervalNotificationTrigger(timeInterval: timeInterval,
repeats: false)
let requestIdentifier = UUID().uuidString //You probably want to save these request identifiers if you want to remove the corresponding notifications later
let request = UNNotificationRequest(identifier: requestIdentifier,
content: content, trigger: trigger)
center.add(request, withCompletionHandler: { (error) in
// Handle error
})
}
})
}
(You may need to save the requests' identifiers (either in user defaults or core data if you'd like to update them, or even cancel them via removePendingNotificationRequests(withIdentifiers:))
You can call the above function like so:
sendNotification(title: "Meeting Reminder",
subtitle: "Staff Meeting in 20 minutes",
body: "Don't forget to bring coffee.",
timeInterval: 10)
Declare your view controller as a UNUserNotificationCenterDelegate:
class ViewController: UIViewController, UNUserNotificationCenterDelegate {
override func viewDidLoad() {
super.viewDidLoad()
UNUserNotificationCenter.current().delegate = self
}
//...
}
And to handle interacting with the notification, update the badge of the app, and the badge of the upcoming notifications:
func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: #escaping () -> Void) {
//UI updates are done in the main thread
DispatchQueue.main.async {
UIApplication.shared.applicationIconBadgeNumber -= 1
}
let center = UNUserNotificationCenter.current()
center.getPendingNotificationRequests(completionHandler: {requests in
//Update only the notifications that have userInfo["timeInterval"] set
let newRequests: [UNNotificationRequest] =
requests
.filter{ rq in
return rq.content.userInfo["timeInterval"] is Double?
}
.map { request in
let newContent: UNMutableNotificationContent = request.content.mutableCopy() as! UNMutableNotificationContent
newContent.badge = (Int(truncating: request.content.badge ?? 0) - 1) as NSNumber
let newRequest: UNNotificationRequest =
UNNotificationRequest(identifier: request.identifier,
content: newContent,
trigger: request.trigger)
return newRequest
}
newRequests.forEach { center.add($0, withCompletionHandler: { (error) in
// Handle error
})
}
})
completionHandler()
}
This updates the app badge by decreasing it when a notification is interacted with ie tapped. Plus it updates the content badge of the pending notifications. Adding a notification request with the same identifier just updates the pending notification.
To receive notifications in the foreground, and increase the app badge icon if the notification is not interacted with, implement this:
func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: #escaping (UNNotificationPresentationOptions) -> Void) {
DispatchQueue.main.async {
UIApplication.shared.applicationIconBadgeNumber += 1
}
completionHandler([.alert, .sound])
}
Here are some gifs:
1st: Receiving local notifications increases the app badge. Whereas interacting with a notification decreases the app badge.
2nd: Receiving local notifications when the app is killed (I used a trigger timeInterval of 15s in this).
3rd: Receiving notification whilst in the foreground increases the app badge unless the user interacts with it.
The complete class used in my test project looks like this:
import UIKit
import UserNotifications
class ViewController: UIViewController, UNUserNotificationCenterDelegate {
var bit = true
#IBAction func send(_ sender: UIButton) {
let time: TimeInterval = bit ? 8 : 4
bit.toggle()
sendNotification(title: "Meeting Reminder",
subtitle: "Staff Meeting in 20 minutes",
body: "Don't forget to bring coffee.",
timeInterval: time)
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
UNUserNotificationCenter.current().delegate = self
}
func sendNotification(title: String, subtitle: String, body: String, timeInterval: TimeInterval) {
let center = UNUserNotificationCenter.current()
center.getPendingNotificationRequests(completionHandler: { pendingNotificationRequests in
DispatchQueue.main.sync {
let content = UNMutableNotificationContent()
content.title = title
content.subtitle = subtitle
content.body = body
let firingDate = Date().timeIntervalSince1970 + timeInterval
content.userInfo = ["timeInterval": firingDate]
let earlierNotificationsCount: Int = pendingNotificationRequests.filter { request in
let userInfo = request.content.userInfo
if let time = userInfo["timeInterval"] as? Double {
if time < firingDate {
return true
} else {
let newContent: UNMutableNotificationContent = request.content.mutableCopy() as! UNMutableNotificationContent
newContent.badge = (Int(truncating: request.content.badge ?? 0) + 1) as NSNumber
let newRequest: UNNotificationRequest =
UNNotificationRequest(identifier: request.identifier,
content: newContent,
trigger: request.trigger)
center.add(newRequest, withCompletionHandler: { (error) in
// Handle error
})
return false
}
}
return false
}.count
content.badge = NSNumber(integerLiteral: UIApplication.shared.applicationIconBadgeNumber + earlierNotificationsCount + 1)
let trigger = UNTimeIntervalNotificationTrigger(timeInterval: timeInterval,
repeats: false)
let requestIdentifier = UUID().uuidString //You probably want to save these request identifiers if you want to remove the corresponding notifications later
let request = UNNotificationRequest(identifier: requestIdentifier,
content: content, trigger: trigger)
center.add(request, withCompletionHandler: { (error) in
// Handle error
})
}
})
}
func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: #escaping (UNNotificationPresentationOptions) -> Void) {
DispatchQueue.main.async {
UIApplication.shared.applicationIconBadgeNumber += 1
}
completionHandler([.alert, .sound])
}
func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: #escaping () -> Void) {
DispatchQueue.main.async {
UIApplication.shared.applicationIconBadgeNumber -= 1
}
let center = UNUserNotificationCenter.current()
center.getPendingNotificationRequests(completionHandler: {requests in
let newRequests: [UNNotificationRequest] =
requests
.filter{ rq in
return rq.content.userInfo["timeInterval"] is Double?
}
.map { request in
let newContent: UNMutableNotificationContent = request.content.mutableCopy() as! UNMutableNotificationContent
newContent.badge = (Int(truncating: request.content.badge ?? 0) - 1) as NSNumber
let newRequest: UNNotificationRequest =
UNNotificationRequest(identifier: request.identifier,
content: newContent,
trigger: request.trigger)
return newRequest
}
newRequests.forEach { center.add($0, withCompletionHandler: { (error) in
// Handle error
})
}
})
completionHandler()
}
}
I'm assuming this all a local notification.
AFAIK there is solution to your question!
When the notification arrives, you're either in foreground or background.
foreground: you get the userNotificationCenter(_:willPresent:withCompletionHandler:) callback but I don't think in that case you'll want to increase the badge right? Because the user has just seen it. Though I can imagine where you might need to do such. Suppose your app is like WhatsApp and the user has the app opened and is sending a message to his mother. Then a message from his father arrives. At this point he hasn't opened the messages between him and his father yet he sees the notification. In your willPresent you could query the getDeliveredNotifications and and adjust your badge count.
background: for iOS10+ version for local notifications you're out of luck! Because there is NO callback for you. The notification gets delivered to the OS and that's it! There use to be a named application:didReceiveLocalNotification:
but that's deprecated. For more on that see here
When user taps (foreground or backend) then you'll get the userNotificationCenter(_:didReceive:withCompletionHandler:)
but that has no use again because the user has already acknowledged receiving the notification and increasing the badge in this case doesn't make sense.
Long story short AFAIK there is nothing you can do for local notifications.
If it's a remote notification then in the application(_:didReceiveRemoteNotification:fetchCompletionHandler:) you can query the delivered notifications and increase the badge count...
EDIT:
Since the badgeCount is attached to the arriving notification, then if you can update its badgeCount prior to arrival then you're all good. e.g. at 12pm you can always query the list of pendingNotifications. It will give you all the notifications arriving after 12pm and update the badgeCount on them if necessary e.g. decrease their badgeCount if some delivered notifications are read. For a complete solution on this see see Carspen90's answer. The gist of his answer is
for any new notification you want to send:
get the pendingNotifications
filter notifications which their firingDate is sooner than the new to be sent notification and get its count
set the new notification's badge to app's badgeCount + filteredCount + 1
if any of the pending notifications have a firingDate greater than the new notification we just added then we will increase the badgeCount on the pending notification by 1.
obviously again whenever you interact with delivered notifications, then you have to get all pendingNotifications again and decrease their badgeCount by 1
CAVEAT:
You can't do such for notifications which their trigger is based on location because obviously they don't care about time.
In one of the WWDC sessions I got code snippet for updating existing notifications. I don't think it works. Trying to update notification content.
First I request pending notifications from UNUserNotificationCenter which always works. Then I am creating new request to update notification with existing unique identifier.
There's 1 new variable content: String.
// Got at least one pending notification.
let triggerCopy = request!.trigger as! UNTimeIntervalNotificationTrigger
let interval = triggerCopy.timeInterval
let newTrigger = UNTimeIntervalNotificationTrigger(timeInterval: interval, repeats: true)
// Update notificaion conent.
let notificationContent = UNMutableNotificationContent()
notificationContent.title = NSString.localizedUserNotificationString(forKey: "Existing Title", arguments: nil)
notificationContent.body = content
let updateRequest = UNNotificationRequest(identifier: request!.identifier, content: notificationContent, trigger: newTrigger)
UNUserNotificationCenter.current().add(updateRequest, withCompletionHandler: { (error) in
if error != nil {
print("🚫 Couldn't update notification \(error!.localizedDescription)")
}
})
I am unable to catch error. The problem is that notification content body doesn't change.
Update.
I also tried to change trigger with different repeat interval. It doesn't work, notification is repeated with the same original interval it was created with.
Update 2.
Read Chris' answer, trying to go with first option.
let center = UNUserNotificationCenter.current()
center.getPendingNotificationRequests(completionHandler: { (requests) in
for request in requests {
if request.identifier == notificationIdentifier {
// Got at least one pending notification,
// update its content.
let notificationContent = UNMutableNotificationContent()
notificationContent.title = NSString.localizedUserNotificationString(forKey: "new title", arguments: nil)
notificationContent.body = "new body"
request.content = notificationContent // ⛔️ request.content is read only.
}
}
})
As you can see I can't modify original request.
Update 3.
Had go with second "delete first" option. Noticed that calling removePendingNotificationRequests and schedule after, still gives me old notification version. I had to add 1 second delay between calling removePendingNotificationRequests and center.add(request).
Marked Chris' answer as accepted but feel free to share better option.
The problem is that you're not modifying the existing notification, and instead adding a new notification with a duplicate identifier.
Let's tackle the duplicate issue first, the reason this duplicate notification doesn't show up is because the identifier isn't unique. From the docs:
(if identifier is not unique, notifications are not delivered).
You have two options. You can 1) modify the existing Notification, or 2) remove it and add the new one.
For 1, you already have the request, instead of pulling the trigger and identifier out of it, just replace request.content with your updated notificationContent.
For 2, you would just need to add a line before your Add:
UNUserNotificationCenter.current().removePendingNotificationRequests(withIdentifiers: [request!.identifier])
After I've requested to Allow Notifications:
I trigger a notification right from my viewDidLoad but then also trigger another one with the same identifier. At the end the the updatedBody/updatedTitle show up.
import UIKit
import UserNotifications
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
let content = UNMutableNotificationContent()
content.title = "Scheduled Task"
content.body = "dumbBody"
content.badge = 1
content.sound = UNNotificationSound.default()
content.categoryIdentifier = "alertCategory"
UNUserNotificationCenter.current().delegate = self
//Setting time for notification trigger
let trigger = UNTimeIntervalNotificationTrigger.init(timeInterval: 3.0, repeats: false)
let request = UNNotificationRequest(identifier:"myIdentifier", content: content, trigger: trigger)
UNUserNotificationCenter.current().add(request, withCompletionHandler: {_ in print(" was registered")})
updateNotification()
}
My update function
func updateNotification(){
let center = UNUserNotificationCenter.current()
var request : UNNotificationRequest?
center.getPendingNotificationRequests{ notifications in
for notificationRequest in notifications{
if notificationRequest.identifier == "myIdentifier"{
request = notificationRequest
center.removeAllPendingNotificationRequests() // Removing this line or keeping it makes NO difference
}
}
let newTrigger = UNTimeIntervalNotificationTrigger.init(timeInterval: 5.0, repeats: false)
// Update notificaion conent.
let notificationContent = UNMutableNotificationContent()
notificationContent.title = "UpdatedTitle"
notificationContent.body = "updatedBody"
let updateRequest = UNNotificationRequest(identifier: request!.identifier, content: notificationContent, trigger: newTrigger)
UNUserNotificationCenter.current().add(updateRequest, withCompletionHandler: { (error) in
print("successfully updated")
if error != nil {
print("🚫 Couldn't update notification \(error!.localizedDescription)")
}
})
}
}
}
In the above snippet: Removing center.removeAllPendingNotificationRequests() would make no difference. Still I would receive the updatedNotification.
For handling incoming notifications
extension ViewController:UNUserNotificationCenterDelegate{
func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: #escaping () -> Void) {
print("original identifier was : \(response.notification.request.identifier)")
print("original body was : \(response.notification.request.content.body)")
print("Tapped in notification")
switch response.actionIdentifier {
default:
print("some action was clicked")
}
}
func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: #escaping (UNNotificationPresentationOptions) -> Void) {
print("Notification being triggered")
completionHandler( [.alert,.sound,.badge])
}
}
I'm new to WatchKit development. I would like to display a message regardless of what app is currently being used or whether the watch is active or not, like how the built-in Timer app shows the label "Timer Done". The user should then be able to click an "OK" button and dismiss the message.
I have tried using both alerts and modal views, but showing them programmatically still requires my app to be active. Using the notifications system is not a viable solution because that would rely on an iPhone.
I've been stuck on this for many hours, any insight would be helpful, thanks.
You need to ask permission in your iOS App first:
UNUserNotificationCenter.current().requestAuthorization(options: [.alert,.badge,.sound])
{ (granted, error) in
if !granted
{
print("User did not give permissions to send notitications...")
}
}
Then in your watchOS App you can create a notification for some time in the future, make sure you give it a UUID (this may be a bug in watchOS3):
let content: UNMutableNotificationContent = UNMutableNotificationContent()
content.title = "Title"
content.subtitle = "Subtitle"
content.body = "message"
content.sound = UNNotificationSound.default()
content.categoryIdentifier = "aCategory"
let trigger = UNTimeIntervalNotificationTrigger(timeInterval: duration, repeats: false)
let id: String = WatchNotify.getUUID()
let request = UNNotificationRequest.init(identifier: id,
content: content,
trigger: trigger)
UNUserNotificationCenter.current().add(request)
{
(error) in // ...
}
....
class func getUUID() -> String
{
let uuidObj = CFUUIDCreate(nil)
let uuidString = CFUUIDCreateString(nil, uuidObj)!
return uuidString as String
}