> For the complete documentation index, see [llms.txt](https://user.netmera.com/netmera-developer-guide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://user.netmera.com/netmera-developer-guide/platforms/react-native/sdk-integration/custom-fcm-implementation.md). # Custom FCM Implementation If you have custom Firebase Cloud Messaging integration, please see usage below. ### iOS Integration Add the following lines to your `AppDelegate.swift` file:

@main
@objc class AppDelegate: RCTAppDelegate, UNUserNotificationCenterDelegate {

    override func application(
        _ application: UIApplication,
        didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
    ) -> Bool {

        // Add it if you are using Firebase.
        UNUserNotificationCenter.current().delegate = self
        // Call before RNNetmera.initNetmera()
        FirebaseApp.configure()
        ...

        return super.application(application, didFinishLaunchingWithOptions: launchOptions)
    }

    // Add it if you are using Firebase.
    @available(iOS 10.0, *)
    override func userNotificationCenter(
        _ center: UNUserNotificationCenter,
        willPresent notification: UNNotification,
        withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void
    ) {
        if #available(iOS 14, *) {
            completionHandler([.banner, .list, .badge, .sound])
        } else {
            completionHandler([.alert, .badge, .sound])
        }
    }

    // Add it if you are using Firebase.
    func userNotificationCenter(
        _ center: UNUserNotificationCenter,
        didReceive response: UNNotificationResponse,
        withCompletionHandler completionHandler: @escaping () -> Void
    ) {
        completionHandler()
    }
    ...
}

### Android Integration Add the following line to your `AndroidManifest.xml` file inside the `application` tag to remove Netmera's default FCM service: ```xml ``` ### React Native Methods After adding Firebase message handler methods according to the official [Firebase documentation](https://rnfirebase.io/messaging/usage#message-handlers), update them as follows:

messaging()
   .getToken()
   .then(pushToken => {
       Netmera.onNetmeraNewToken(pushToken)
});

messaging().onMessage(async remoteMessage => {
   if (Netmera.isNetmeraRemoteMessage(remoteMessage.data)) {
       Netmera.onNetmeraFirebasePushMessageReceived(remoteMessage.from, remoteMessage.data)
   }
});

messaging().setBackgroundMessageHandler(async remoteMessage => {
    if (Netmera.isNetmeraRemoteMessage(remoteMessage.data)) {
        Netmera.onNetmeraFirebasePushMessageReceived(remoteMessage.from, remoteMessage.data)
    }
});

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