Flutter iOS SDK Setup

Setting up the SDK

Follow our setup guide to integrate the Reteno Flutter SDK with your app.

Step 1: Add a Notification Service Extension

The NotificationServiceExtension allows your iOS application to receive rich notifications with images. It's also required for Reteno's analytics features.

1.1 In Xcode Select File → New → Target...

1.2 Select Notification Service Extension then press Next.

Notification Service Extension

1.3 Enter the product name as NotificationServiceExtension and press Finish.

Do not select Activate on the dialog that is shown after selecting Finish.


1.4 Press Cancel on the Activate scheme prompt.

By canceling, you keep Xcode debugging your app instead of the extension you’ve just created.

If you activate the prompt by accident, you can switch back to debugging your app in Xcode (next to the Play button).

1.5 In the project navigator, select the project directory and select the NotificationServiceExtension target in the targets list.

Check that the Deployment Target is set to the same value as your Main Application Target.



iOS versions under 10 will not be able to get Rich Media.

Main Application Target

1.6 In the project navigator, select the NotificationServiceExtension folder and open the NotificationService.swift, then replace the entire file contents with the following code. Ignore any build errors at this point. We will import the Reteno module, which will resolve any errors.

import UserNotifications
import Reteno

class NotificationService: RetenoNotificationServiceExtension {}

More about Notification Service Extension Modifying Content in Newly Delivered Notifications

Step 2: Install the SDK

2.1 Modify your Podfile to contain next dependencies:

target 'Runner' do
  pod 'Reteno', '1.5.4'
  pod 'FirebaseCore'
  pod 'FirebaseMessaging'
  pod 'Sentry', '7.28.0', :modular_headers => true

target 'NotificationServiceExtension' do
  pod 'Reteno', '1.5.4'
  pod 'Sentry', '7.28.0', :modular_headers => true

2.2 Open the <project-name>.xcworkspace file.

Step 3: Add reteno_flutter_sdk dependency in pubspec.yaml:

Install reteno_plugin using flutter pub command

flutter pub add reteno_plugin

This will add entry in your project's pubspec.yaml (and run flutter pub get):

 reteno_plugin: (latest_version_here)

Step 3: Import Reteno into Your App Delegate

To setup SDK you need an SDK_ACCESS_KEY, visit Managing Mobile SDK Access Keys to get it.

Method 1: you have AppDelegate.swift file

Open your AppDelegate.swift file and add the Reteno initialization code to the didFinishLaunchingWithOptions method.
Make sure to import the Reteno module import Reteno

import UIKit
import Flutter
import Reteno
import FirebaseCore
import FirebaseMessaging

@objc class AppDelegate: FlutterAppDelegate {
    override func application(
        _ application: UIApplication,
        didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
    ) -> Bool {
        GeneratedPluginRegistrant.register(with: self)
        Messaging.messaging().delegate = self
        Reteno.start(apiKey: "SDK_ACCESS_KEY")
        Reteno.userNotificationService.registerForRemoteNotifications(with: [.sound, .alert, .badge], application: application)
        return super.application(application, didFinishLaunchingWithOptions: launchOptions)

    // Remaining contents of your AppDelegate Class...

Step 4: Add App Groups

4.1 In your Main app target got to "Signing & Capabilities""All"

4.2 Click "+ Capability" if you do not have App Groups in your app yet.


4.3 Select App Groups.

App Groups

4.4 Under App Groups click the "+" button.

4.5 Fill the "App Groups" container as group.{bundle_id}.reteno-local-storage where bundle_id is the same as "Bundle Identifier" off your app (in the main target) and press OK.

4.6 In the NotificationServiceExtension target and repeat steps 4.2 - 4.5 for extension target




The group name structure should be group.{bundle_id}.reteno-local-storage where bundle_id is the same as your Main App target "Bundle Identifier". Do Not Include NotificationServiceExtension.

For more information visit Configuring App Groups

Step 5: Add ‘Push Notification’ Capability to Your Main App Target (not NotificationServiceExtension!)

Step 6: Provide Device Token to the SDK via Next Method:

Reteno.userNotificationService.processRemoteNotificationsToken(_ deviceToken: String)

If you use Firebase for Remote notifications, it should be done in MessagingDelegate method

extension AppDelegate: MessagingDelegate {
    func messaging(_ messaging: Messaging, didReceiveRegistrationToken fcmToken: String?) {
        guard let fcmToken = fcmToken else { return }

In other case, convert deviceToken data to the String and provide to the SDK, like in the example below:

func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
        let tokenString = deviceToken.map { String(format: "%02.2hhx", $0) }.joined()

Step 7: Run Your App and Send Yourself a Notification

Run your app on a physical iOS device to make sure it builds correctly. You should be prompted to subscribe to push notifications.



The iOS Simulator does not support receiving remote push notifications.