Apple प्लैटफ़ॉर्म के ऐप्लिकेशन में मैसेज पाना

// Receive displayed notifications for iOS 10+ devices.
func userNotificationCenter(_ center: UNUserNotificationCenter,
                            willPresent notification: UNNotification) async
  -> UNNotificationPresentationOptions {
  let userInfo = notification.request.content.userInfo

  // With swizzling disabled you must let Messaging know about the message, for Analytics
  // Messaging.messaging().appDidReceiveMessage(userInfo)

  // ...

  // Print full message.
  print(userInfo)

  // Change this to your preferred presentation option
  // Note: UNNotificationPresentationOptions.alert has been deprecated.
  return [.list, .banner, .sound]
}

func userNotificationCenter(_ center: UNUserNotificationCenter,
                            didReceive response: UNNotificationResponse) async {
  let userInfo = response.notification.request.content.userInfo

  // ...

  // Print full message.
  print(userInfo)
}
MigratedSnippets.swift

// Receive displayed notifications for iOS 10+ devices.
// Handle incoming notification messages while app is in the foreground.
- (void)userNotificationCenter:(UNUserNotificationCenter *)center
       willPresentNotification:(UNNotification *)notification
         withCompletionHandler:(void (^)(UNNotificationPresentationOptions))completionHandler {
  NSDictionary *userInfo = notification.request.content.userInfo;

  // With swizzling disabled you must let Messaging know about the message, for Analytics
  // [[FIRMessaging messaging] appDidReceiveMessage:userInfo];

  // Print full message.
  NSLog(@"%@", userInfo);

  // Change this to your preferred presentation option
  completionHandler(UNNotificationPresentationOptionList |
                    UNNotificationPresentationOptionBanner |
                    UNNotificationPresentationOptionSound);
}

- (void)messaging:(FIRMessaging *)messaging didReceiveRegistrationToken:(NSString *)fcmToken {
    NSLog(@"FCM registration token: %@", fcmToken);
    // Notify about received token.
    NSDictionary *dataDict = [NSDictionary dictionaryWithObject:fcmToken forKey:@"token"];
    [[NSNotificationCenter defaultCenter] postNotificationName:
     @"FCMToken" object:nil userInfo:dataDict];
    // TODO: If necessary send token to application server.
    // Note: This callback is fired at each app startup and whenever a new token is generated.
}

- (void)logFCMToken {
  NSString *fcmToken = [FIRMessaging messaging].FCMToken;
  NSLog(@"Local FCM registration token: %@", fcmToken);

  NSString* displayToken = [NSString stringWithFormat:@"Logged FCM token: %@", fcmToken];

  [[FIRMessaging messaging] tokenWithCompletion:^(NSString * _Nullable token, NSError * _Nullable error) {
    if (error != nil) {
      NSLog(@"Error fetching the remote FCM registration token: %@", error);
    } else {
      NSLog(@"Remote FCM registration token: %@", token);
      NSString* message =
        [NSString stringWithFormat:@"FCM registration token: %@", token];
      // display message
      NSLog(@"%@", message);
    }
  }];
  NSLog(@"%@", displayToken);
}

- (void)subsribeToTopic {
  [[FIRMessaging messaging] subscribeToTopic:@"weather"
                                  completion:^(NSError * _Nullable error) {
    NSLog(@"Subscribed to weather topic");
  }];
}

@end
ObjCMigratedSnippets.m

@MainActor
func application(_ application: UIApplication,
                 didReceiveRemoteNotification userInfo: [AnyHashable: Any]) async
  -> UIBackgroundFetchResult {
  // If you are receiving a notification message while your app is in the background,
  // this callback will not be fired till the user taps on the notification launching the application.
  // TODO: Handle data of notification

  // With swizzling disabled you must let Messaging know about the message, for Analytics
  // Messaging.messaging().appDidReceiveMessage(userInfo)

  // ...

  // Print full message.
  print(userInfo)
  print("Call exportDeliveryMetricsToBigQuery() from AppDelegate")
  Messaging.serviceExtension().exportDeliveryMetricsToBigQuery(withMessageInfo: userInfo)
  return UIBackgroundFetchResult.newData
}
MigratedSnippets.swift

- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo
    fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler {
  // If you are receiving a notification message while your app is in the background,
  // this callback will not be fired until the user taps on the notification launching the application.
  // TODO: Handle data of notification

  // With swizzling disabled you must let Messaging know about the message, for Analytics
  // [[FIRMessaging messaging] appDidReceiveMessage:userInfo];

  // Print full message.
  NSLog(@"%@", userInfo);

  completionHandler(UIBackgroundFetchResultNewData);
}
ObjCMigratedSnippets.m

func application(_ application: UIApplication,
    didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
  Messaging.messaging().apnsToken = deviceToken;
}

- (void)application:(UIApplication *)application
    didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken {
  [FIRMessaging messaging].APNSToken = deviceToken;
}

func userNotificationCenter(_ center: UNUserNotificationCenter,
                            willPresent notification: UNNotification,
  withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
  let userInfo = notification.request.content.userInfo

  Messaging.messaging().appDidReceiveMessage(userInfo)

  // Change this to your preferred presentation option
  completionHandler([[.alert, .sound]])
}

func userNotificationCenter(_ center: UNUserNotificationCenter,
                            didReceive response: UNNotificationResponse,
                            withCompletionHandler completionHandler: @escaping () -> Void) {
  let userInfo = response.notification.request.content.userInfo

  Messaging.messaging().appDidReceiveMessage(userInfo)

  completionHandler()
}

func application(_ application: UIApplication,
didReceiveRemoteNotification userInfo: [AnyHashable : Any],
  fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) {
  Messaging.messaging().appDidReceiveMessage(userInfo)
  completionHandler(.noData)
}

- (void)userNotificationCenter:(UNUserNotificationCenter *)center
      willPresentNotification:(UNNotification *)notification
        withCompletionHandler:(void (^)(UNNotificationPresentationOptions))completionHandler {
  NSDictionary *userInfo = notification.request.content.userInfo;

  [[FIRMessaging messaging] appDidReceiveMessage:userInfo];

  // Change this to your preferred presentation option
  completionHandler(UNNotificationPresentationOptionBadge | UNNotificationPresentationOptionAlert);
}

- (void)userNotificationCenter:(UNUserNotificationCenter *)center
didReceiveNotificationResponse:(UNNotificationResponse *)response
        withCompletionHandler:(void(^)(void))completionHandler {
  NSDictionary *userInfo = response.notification.request.content.userInfo;

  [[FIRMessaging messaging] appDidReceiveMessage:userInfo];

  completionHandler();
}

- (void)application:(UIApplication *)application
didReceiveRemoteNotification:(NSDictionary *)userInfo
fetchCompletionHandler:(void (^)(UIBackgroundFetchResult result))completionHandler {
  [[FIRMessaging messaging] appDidReceiveMessage:userInfo];
  completionHandler(UIBackgroundFetchResultNoData);
}