When the server sends a silent notification, I want to check if the user is in the right state and then issue a local notification as a result if the user is in the right state or do nothing if the user is not in the right state.
Is this feasible?
Thank you!
If you send the push notification with "content-available": 1 it will be a silent push (see Apple's local and remote notification guide).
You then want to conditionally schedule a local notification with UNUserNotificationCenter.current().add() and implement the delegate methods for UNUserNotificationCenterDelegate.
It's not good idea.
The system treats background notifications as low-priority.
proof: https://developer.apple.com/documentation/usernotifications/setting_up_a_remote_notification_server/pushing_background_updates_to_your_app
So background notification is not for you case.
If you don't want show notification for some cases, you just in
implementation method of UNUserNotificationCenterDelegate don't call completion handler:
func userNotificationCenter(_ center: UNUserNotificationCenter,
willPresent notification: UNNotification,
withCompletionHandler completionHandler: #escaping (UNNotificationPresentationOptions) -> Void) {
guard self.shouldShowNotification(notification) else { return } // don't call completion handler if we're don't want to show push
completionHandler(.alert)
}
func shouldShowNotification(_ notification: UNNotification) -> Bool {
if ... {
return true
} else {
return false
}
}
Related
I used local notification to deliver a message to the user at the same time I want to update App badge when the notification triggers, but the local notification delegate have functions that deal with notifications when the app is in the foreground and when the user interacts with notification (like a tap on it). Is there any way to update the app badge when the notification triggers and the app is in background?
Handle notification when the app is in the foreground
func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: #escaping (UNNotificationPresentationOptions) -> Void) {
// run code when app in foreground
}
Handle notification when the tap action on it
func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: #escaping () -> Void) {
// run code when user interact with notification only
}
To update App badge when local notification trigger set the badge value in the code bellow when set the notification:
func schedulNotification() {
let content = UNMutableNotificationContent()
content.badge = 1 // That will appear on app icon when notification trigger
// Continue notification settings...
}
My requirement is prevent remote notification from being display.
I can handler this if app is in foreground or background in following methods:
func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable: Any]) {
//logic hide notification here
}
public func userNotificationCenter(_ center: UNUserNotificationCenter,
willPresent notification: UNNotification,
withCompletionHandler completionHandler: #escaping (UNNotificationPresentationOptions) -> Void) {
//logic hide notification here
}
When app is being killed, I'm trying to handler logic in UNNotificationServiceExtension but it did not work:
override func didReceive(_ request: UNNotificationRequest, withContentHandler contentHandler: #escaping (UNNotificationContent) -> Void) {
// logic hide notification here
}
I've read this article: Is it possible to prevent a remote notification from being displayed?
It said that Apple not allow to do this, is this correct?
Yes, it's correct.
You cannot catch a remote notification and hide it. The best way to not receive remote notifications is to say no to the permission. If your server send remote notifications you can configure it not to send notifications when you does not want.
Another way to send notifications and not show them is to send "silent notification". It allows you to receive the notification, get its content and do what you want (you have only 30s). I thinks, you can send silent notifications, check content and send a local notification if it needs to, but I'm not sure.
Are you attempting to remove notifications completely? (foreground AND background?)
If that is the case then you should ask your back-end service to send you a silent notification instead of a normal one. you shouldn't be handling that yourself.
I have implemented push notification for ios10. Tapping on the notification alert would trigger "didReceive" delegate, were i save the notification in coredata or silent notification if i m in foreground. The problem is if i receive a stack of notification in background and When i bring my app to foreground from background, Is there a possibility to call "didReceive" delegate or any other push notification delegate were i could sync my items to coredata.
Note
I don't want to sync(didReceive or any delegate) the items in background using silent notification nor tapping on the alert. It should sync automatically the stack of push notification when i bring the app to foreground
func handleInboxNotification(didReceiveRemoteNotification userInfo: [AnyHashable: Any]) {
if let inboxValue = userInfo["inbox"] as? String, let value = inboxValue.boolValue(), value {
let mappedMessage = MessageCenterSDK.shared.constructReorderedDictionary(userInfo: userInfo)
MessageCenterDataManager.shared.synchronize(messages: mappedMessage)
messageCenterDelegate?.didFindNewMessages(hasNewMessages: true)
}
}
func userNotificationCenter(_ center: UNUserNotificationCenter,
didReceive response: UNNotificationResponse,
withCompletionHandler completionHandler: #escaping () -> Void) {
/// Handle outbound remote
handleInboxNotification(didReceiveRemoteNotification: response.notification.request.content.userInfo)
completionHandler()
}
I was facing the same issue, but my target was for iOS 13 & I'm using BGTaskScheduler to fetch data from the server in the background as well in terminated state.
I too want to trigger the notification when the app is in background. But not tapped but that seems to be not possible so we have changed our implementation by enabling background mode and it worked for me.
Hope it also helps.
For more reference on BGTaskScheduler, https://developer.apple.com/documentation/backgroundtasks/bgtaskscheduler
you need to use willpresent delegate in appDelegate
func userNotificationCenter(_ center: UNUserNotificationCenter,
willPresent notification: UNNotification,
withCompletionHandler completionHandler: #escaping (UNNotificationPresentationOptions) -> Void) {
// Change this to your preferred presentation option
completionHandler([])
}
This delegate is called when a notification comes in foreground
I have setup push notifications using APNS for iOS (Using Swift) in the flutter App. didReceiveRemoteNotification is getting triggered when the app receives a push notification from AWS Pinpoint. But none of the other methods are getting triggered when the user taps the notification. Once I handle the user action on the push notification, I can call a scheme using openUrl to specific route on the app.
I have tried by disabling/enabling background modes in the capabilities in the Xcode. Also verified that push notifications are turned on in the capabilities. Pinpoint uses APNS to send the notification to iOS and Firebase to send the notification to Android which is working fine.
Also tried with iOS target version as 10.0, 11.0 and 12.0
UNUserNotificationCenter.current().delegate = self
is declared in didFinishLaunchingWithOptions and imported UserNotifications
When I tap the push notification, this is getting printed in the console:
Warning: UNUserNotificationCenter delegate received call to -userNotificationCenter:didReceiveNotificationResponse:withCompletionHandler: but the completion handler was never called.
Payload from pinpoint:
[AnyHashable("aps"): {
alert = {
body = "BODY";
title = "TITLE";
};
badge = 0;
"content-available" = 1;
"mutable-content" = 0;
sound = default;
}]
Code,
extension AppDelegate: UNUserNotificationCenterDelegate {
func userNotificationCenter(_ center: UNUserNotificationCenter,
willPresent notification: UNNotification,
withCompletionHandler completionHandler: #escaping (UNNotificationPresentationOptions) -> Void) {
let userInfo = notification.request.content.userInfo
// Print full message.
print(userInfo)
// Change this to your preferred presentation option
completionHandler([])
}
func userNotificationCenter(_ center: UNUserNotificationCenter,
didReceive response: UNNotificationResponse,
withCompletionHandler completionHandler: #escaping () -> Void) {
let userInfo = response.notification.request.content.userInfo
// Print full message.
print(userInfo)
completionHandler()
}
}
didReceive is expected to get triggered when the user taps on the push notification which is not happening in my case.
Can anyone help me on how to trigger when the user taps the push notification?
I was facing a similar problem. iOS swift delegate methods were not triggered. It appears that the methods must have been declared public.
Just replace
func userNotificationCenter
with
public func userNotificationCenter
Maybe it will helps someone...
Have you set center's delegate property?
center.delegate = self
where self is AppDelegate.
I have a messaging app, which gets data from server through push notification.
In the following image, you can see the process and also check where it gets faulted:
I have researched a lot about this problem but not getting a universal solution.
One solution I get is to use silent notification , discussed Here , to get data before it is shown and save it. But I didn't find how to show notification from app delegate once I received silent notification.
Kindly correct me if I am conceptually wrong somewhere.
Update:
One of problem is that the application:didReceiveRemoteNotification:fetchCompletionHandler: is only called when
app is in foreground
user clicks the notification
But when user doesn't click the notification, application:didReceiveRemoteNotification:fetchCompletionHandler: is not called, and I can't find a way to save the data, that is present in notification.
Your question is "To get data from Remote notification while the App is in foreground" if im correct, You can use these two methods to get data from Remote notifications for background and foreground app modes.
// Notification will present call back
#available(iOS 10.0, *)
func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: #escaping (UNNotificationPresentationOptions) -> Void) {
completionHandler([.alert, .sound, .badge])
// Handle your data here
print("Notification data: \(notification.request.content.userInfo)")
}
#available(iOS 10.0, *)
// Notification interaction response call back
func userNotificationCenter(_ center: UNUserNotificationCenter,
didReceive response: UNNotificationResponse,
withCompletionHandler completionHandler: #escaping () -> Void) {
// Handle your data here
print("Notification data: \(response.notification.request.content.userInfo)")
}
There are two cases:
Background
Closed State
If the app is in Background State, you have to enable Background Fetch, then this method will be called when the app is in Background application:didReceiveRemoteNotification:fetchCompletionHandler:
When the app is closed or killed by the user the above method not gonna work, for that you can use the VoIP technique.
didReceiveIncomingPushWithPayload method will be called whenever Remote Notification arrives
You can find more details about VoIP here