Not receiving remote push notifications on iOS - ios

Question

I'm currently rewriting my app from Objective-C to Swift and working on notifications. For some reason Swift version of the app is not receiving any remote push notifications while Objective-C version does.
Here's the code I'm using to register for notifications in AppDelegate:
UNUserNotificationCenter.current().delegate = self
let options: UNAuthorizationOptions = [.badge, .alert, .sound]
UNUserNotificationCenter.current().requestAuthorization(options: options, completionHandler: { granted, error in
print("access granted: \(granted)")
})
application.registerForRemoteNotifications()
I assume that the app successfully registers because didRegisterForRemoteNotificationsWithDeviceToken method gets called. But when I try to send the test notification using the token I got from that method, I don't get actual notification on device.
Also none of these methods get called:
func pushRegistry(_ registry: PKPushRegistry, didReceiveIncomingPushWith payload: PKPushPayload, for type: PKPushType) {
}
func userNotificationCenter(_ center: UNUserNotificationCenter, openSettingsFor notification: UNNotification?) {
}
func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: #escaping (_ options: UNNotificationPresentationOptions) -> Void) {
}
func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: #escaping () -> Void) {
}
func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable : Any], fetchCompletionHandler completionHandler: #escaping (UIBackgroundFetchResult) -> Void) {
}
func application(_ application: UIApplication, handleActionWithIdentifier identifier: String?, forRemoteNotification userInfo: [AnyHashable : Any], completionHandler: #escaping () -> Void) {
}
What am I doing wrong?

Answer 1

you say that you are not receiving so let's first make sure that those methods you mention before that are not being called are comming from here extension AppDelegate: UNUserNotificationCenterDelegate (By the way when you do implement the didReceive method make sure you call the completionHandler() at the end)
When you do this:
application.registerForRemoteNotifications()
Make sure to run it from the main thread, as it can be called if not specified from the background and that might fail. You can do so by doing
DispatchQueue.main.async {
UIApplication.shared.registerForRemoteNotifications()
}
I'll assume that you are getting the device token this way or something similar:
func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
// 1. Convert device token to string
let tokenParts = deviceToken.map { data -> String in
return String(format: "%02.2hhx", data)
}
let token = tokenParts.joined()
// 2. Print device token to use for PNs payloads
print("Device Token: \(token)")
}
Finally implement this method to see if there are any errors while registering the device
func application(_ application: UIApplication, didFailToRegisterForRemoteNotificationsWithError error: Error) {
// 1. Print out error if PNs registration not successful
print("Failed to register for remote notifications with error: \(error)")
}
Oh by the way (just in case you have missed it) make sure you enabled in your project's target the push notification.

Answer 2

Make sure you have enabled Push notification in your project setting capabilities.
How to enable:
go to target: -> select project -> go to capabilities -> go to Push Notification. enable it there.
Another thing is the certificate. While development you should not Production certificates.