Requirements

• iOS: iOS 11+ or iPadOS 11+ device (iPhone, iPad, iPod Touch) to test on. Xcode 14+ simulator works running iOS 16+
• iOS: mac with Xcode 12+
• Android: Android 5.0+ device or emulator with "Google Play Store (Services)" installed
• Paid Flutterflow plan (Standard or higher)
• Configured OneSignal App and Platform

Configure your OneSignal App and Platform

Details on configuring your OneSignal App and Platform (click to expand)

If you haven't already, sign up for a free account on onesignal.com.

You can setup multiple platforms (iOS, Android, Web, Email, SMS) within the same OneSignal App under Settings > Platforms. If you want to create a new app select New App/Website. If this is your first OneSignal app, you will see the next page.

Name your app and organization something recognizable, then select the platform to setup. You can always set up more platforms in this OneSignal App later within Settings > Platforms.

Click Next: Configure Your Platform.

To configure your app, follow the prompts based on the platforms you support.

• Android: Set up your Android Firebase Credentials
• iOS: p8 Authentication Token or p12 Push Notification Certificate
• Amazon: Generate an Amazon API Key
• Huawei: Authorize OneSignal to send Huawei Push

After you setup your credentials, click Save & Continue.

Choose your Apps Target SDK, the click Save & Continue.

Finally, you will be directed to install the SDK and provided your OneSignal App ID. Make sure to save your App ID as you will need it later.

If you need a teammate or your developer to assist, you can click Invite them to the app and select Done when finished.

Continue through the documentation to finish adding OneSignal to your app.

🚧

This guide is for setting up our mobile SDK only.

For setting up our SDK with your Flutterflow site, please see our Web SDK setup guide.

Setup

1. Create a new Custom Action

In your Flutterflow project, navigate to Custom Code, then click the +Add button and select Action.

Under Action settings on the right-hand toolbar, click Add Dependency and enter the following dependency and click refresh to add it to the action:

onesignal_flutter: ^5.2.3

In the Action Code, under the pre-loaded code add the following and save and compile your action:

import 'package:onesignal_flutter/onesignal_flutter.dart';

Future onesignal() async {
  //Remove this method to stop OneSignal Debugging
  OneSignal.Debug.setLogLevel(OSLogLevel.verbose);

  OneSignal.initialize("<YOUR APP ID HERE>");

  // The promptForPushNotificationsWithUserResponse function will show the iOS or Android push notification prompt. We recommend removing the following code and instead using an In-App Message to prompt for notification permission
  OneSignal.Notifications.requestPermission(true);
}

Next, click on the main.dart file in the left-hand tool bar and click the + icon next to Initial Actions in the right-hand bar and click on the onesignal action that has just been created.

This will add the action to you app and cause the OneSignal SDK to be initialised when the app runs:

2. Exporting the Project

APK Download (Android Only)

Open the Developer Menu and download the APK:

Once the APK has downloaded, you can test the app by dragging the APK into an Android emulator to install it. Push capabilities should work immediately and you can send push notifications to the device as soon as you provide push permissions through the native prompt.

Full Project Download (iOS and Android)

Open the Developer Menu and download the project code:

3. iOS Setup

The downloaded project will likely not be ready to launch in iOS. Before setting up the OneSignal specific additions, you will need to make sure that the project is fully built. To do so:

• Open up a Terminal window, cd (change directory) to the ios folder of your downloaded project.
• In Terminal type flutter build iosand press enter. Wait for the build to complete, this may take some time depending on the size of your project.
• Still in Terminal type pod install and press enter. Wait for the pod install to complete.

Open the .xcworkspace file in Xcode located your project's ios folder.

Select the root project > your main app target > Signing & Capabilities.

If you do not see Push Notifications enabled, click + Capability and add Push Notifications. Ensure that you enter the correct details for your Team and Bundle Identifier.

Click + Capability again and add Background Modes. Then check Remote notifications.

Add Notification Service Extension

The OneSignalNotificationServiceExtension allows your iOS application to receive rich notifications with images, buttons, and badges. It's also required for OneSignal's Confirmed Delivery analytics features.

In Xcode Select File > New > Target...

Select Notification Service Extension then Next.

Enter the product name as OneSignalNotificationServiceExtension and press Finish.

Do not activate the scheme on the dialog that is shown after selecting Finish.

Press Cancel on the "Activate scheme" prompt.

Select the OneSignalNotificationServiceExtension target and General settings.

Set Minimum Deployments to be the same value as your Main Application Target. This should be iOS 11 or higher.

Add App Groups

App Groups allow your app and the OneSignalNotificationServiceExtension to communicate when a notification is received, even if your app is not active. This is required for badges and Confirmed Deliveries.

Select your Main App Target > Signing & Capabilities > + Capability > App Groups.

Within App Groups, click the + button.

Set the App Groups container to be group.YOUR_BUNDLE_IDENTIFIER.onesignal where YOUR_BUNDLE_IDENTIFIER is the same as your Main Application "Bundle Identifier".

Press OK and repeat for the OneSignalNotificationServiceExtension Target.

Select the OneSignalNotificationServiceExtension Target > Signing & Capabilities > + Capability > App Groups.

Within App Groups, click the + button.

Set the App Groups container to be group.YOUR_BUNDLE_IDENTIFIER.onesignal where YOUR_BUNDLE_IDENTIFIER is the same as your Main Application "Bundle Identifier".

DO NOT INCLUDE OneSignalNotificationServiceExtension.

Add OneSignal SDK to the OneSignalNotificationServiceExtension

In the /ios directory of your project, open the Podfile and add the following outside of the main target (should be at the same level as your main target):

target 'OneSignalNotificationServiceExtension' do
  use_frameworks!
  pod 'OneSignalXCFramework', '>= 5.0.0', '< 6.0'
end

# Uncomment this line to define a global platform for your project
platform :ios, '11.0'

# CocoaPods analytics sends network stats synchronously affecting flutter build latency.
ENV['COCOAPODS_DISABLE_STATS'] = 'true'

project 'Runner', {
  'Debug' => :debug,
  'Profile' => :release,
  'Release' => :release,
}

def flutter_root
  generated_xcode_build_settings_path = File.expand_path(File.join('..', 'Flutter', 'Generated.xcconfig'), __FILE__)
  unless File.exist?(generated_xcode_build_settings_path)
    raise "#{generated_xcode_build_settings_path} must exist. If you're running pod install manually, make sure flutter pub get is executed first"
  end

  File.foreach(generated_xcode_build_settings_path) do |line|
    matches = line.match(/FLUTTER_ROOT\=(.*)/)
    return matches[1].strip if matches
  end
  raise "FLUTTER_ROOT not found in #{generated_xcode_build_settings_path}. Try deleting Generated.xcconfig, then run flutter pub get"
end

require File.expand_path(File.join('packages', 'flutter_tools', 'bin', 'podhelper'), flutter_root)

flutter_ios_podfile_setup

target 'Runner' do
  use_frameworks!
  use_modular_headers!

  flutter_install_all_ios_pods File.dirname(File.realpath(__FILE__))
end

post_install do |installer|
  installer.pods_project.targets.each do |target|
    flutter_additional_ios_build_settings(target)
  end
end

target 'OneSignalNotificationServiceExtension' do
  use_frameworks!
  pod 'OneSignalXCFramework', '>= 5.0.0', '< 6.0'
end

At the top of your Podfile make sure you have platform :ios, '11.0'.
- Or a newer iOS version if your app requires it.

# Uncomment this line to define a global platform for your project
platform :ios, '11.0'

Open terminal, cd to the ios directory, and run pod install.

If you see the error below, add use_frameworks! to the top of your podfile and try again.

- Runner (true) and OneSignalNotificationServiceExtension (false) do not both set use_frameworks!.

OneSignalNotificationServiceExtension Code

In the Xcode project navigator, select the OneSignalNotificationServiceExtension folder and open the NotificationService.m or NotificationService.swift file.

Replace the whole file's contents with the following code.

import UserNotifications

import OneSignalExtension

class NotificationService: UNNotificationServiceExtension {
    
    var contentHandler: ((UNNotificationContent) -> Void)?
    var receivedRequest: UNNotificationRequest!
    var bestAttemptContent: UNMutableNotificationContent?
    
    override func didReceive(_ request: UNNotificationRequest, withContentHandler contentHandler: @escaping (UNNotificationContent) -> Void) {
        self.receivedRequest = request
        self.contentHandler = contentHandler
        self.bestAttemptContent = (request.content.mutableCopy() as? UNMutableNotificationContent)
        
        if let bestAttemptContent = bestAttemptContent {
            /* DEBUGGING: Uncomment the 2 lines below to check this extension is executing
                          Note, this extension only runs when mutable-content is set
                          Setting an attachment or action buttons automatically adds this */
            // print("Running NotificationServiceExtension")
            // bestAttemptContent.body = "[Modified] " + bestAttemptContent.body
            
            OneSignalExtension.didReceiveNotificationExtensionRequest(self.receivedRequest, with: bestAttemptContent, withContentHandler: self.contentHandler)
        }
    }
    
    override func serviceExtensionTimeWillExpire() {
        // Called just before the extension will be terminated by the system.
        // Use this as an opportunity to deliver your "best attempt" at modified content, otherwise the original push payload will be used.
        if let contentHandler = contentHandler, let bestAttemptContent =  bestAttemptContent {
            OneSignalExtension.serviceExtensionTimeWillExpireRequest(self.receivedRequest, with: self.bestAttemptContent)
            contentHandler(bestAttemptContent)
        }
    }  
}

#import <OneSignalExtension/OneSignalExtension.h>

#import "NotificationService.h"

@interface NotificationService ()

@property (nonatomic, strong) void (^contentHandler)(UNNotificationContent *contentToDeliver);
@property (nonatomic, strong) UNNotificationRequest *receivedRequest;
@property (nonatomic, strong) UNMutableNotificationContent *bestAttemptContent;

@end

@implementation NotificationService

- (void)didReceiveNotificationRequest:(UNNotificationRequest *)request withContentHandler:(void (^)(UNNotificationContent * _Nonnull))contentHandler {
    self.receivedRequest = request;
    self.contentHandler = contentHandler;
    self.bestAttemptContent = [request.content mutableCopy];
    
    /* DEBUGGING: Uncomment the 2 lines below and comment out the one above to ensure this extension is executing
                  Note, this extension only runs when mutable-content is set
                  Setting an attachment or action buttons automatically adds this */
    // NSLog(@"Running NotificationServiceExtension");
    // self.bestAttemptContent.body = [@"[Modified] " stringByAppendingString:self.bestAttemptContent.body];
    
    [OneSignalExtension didReceiveNotificationExtensionRequest:self.receivedRequest
                       withMutableNotificationContent:self.bestAttemptContent
                                   withContentHandler:self.contentHandler];
}

- (void)serviceExtensionTimeWillExpire {
    // Called just before the extension will be terminated by the system.
    // Use this as an opportunity to deliver your "best attempt" at modified content, otherwise the original push payload will be used.
    
    [OneSignalExtension serviceExtensionTimeWillExpireRequest:self.receivedRequest withMutableNotificationContent:self.bestAttemptContent];
    
    self.contentHandler(self.bestAttemptContent);
}

@end

4. Testing

Run your app on a physical device to make sure it builds correctly.

If you used the provided code, then the requestPermission method should prompt you to subscribe to push notifications. You can change this later.

Check your OneSignal Dashboard Audience > Subscriptions to see your User & Subscription Record.

Then head over to Messages > New Push to Send your first Push Notification from OneSignal.

📘

Troubleshooting

If you run into any issues please see our Flutter troubleshooting guide.

Try the example project on our Github repository.

If stuck, contact support directly or email [email protected] for help.

For faster assistance, please provide:

• Your OneSignal App Id
• Details, logs, and/or screenshots of the issue
• Steps to reproduce

Recommended

Push permission with In-App Message

You can continue to opt-in users to push via the requestPermission method. However, Apple's Human Interface Guidelines recommends that apps "Create an alert, modal view, or other interface that describes the types of information they want to send and gives people a clear way to opt in or out."

OneSignal provides In-App Messages to meet this recommendation and have a better user experience. This also permits you to ask for permission again in the future, since the native permission prompt is limited to how many times it can show and cannot be shown again if the user clicks deny.

See How to Prompt for Push Permissions with In-App Messages for details on implementing this.

Identify Users

Required if using integrations.
Recommended for messaging across multiple channels (push, email, sms).

OneSignal creates subscription-level records under a unique ID called the subscription_id. A single user can have multiple subscription_id records based on how many devices, email addresses, and phone numbers they use to interact with your app.

If your app has its own login system to track users, call login at any time to link all channels to a single user. For more details, see Aliases & External ID.

var externalId = "123456789" // You will supply the external id to the OneSignal SDK
OneSignal.login(externalId);

Set Email and Phone Number

Recommended if using Email and SMS messaging.

Use the provided SDK methods to capture email and phone number when provided. Follow the channel quickstart guides for setup:

• Email Quickstart
• SMS Quickstart

// Pass in email provided by customer
OneSignal.User.addEmail("[email protected]");

// Pass in phone number provided by customer
OneSignal.User.addSms("+11234567890");

Add Data Tags

Optional

Tags are custom key : value pairs of String data used for tracking user events and properties. Setting tags is required for more complex segmentation and message personalization.

See Data Tags for more details.

OneSignal.User.addTagWithKey("test1", "val1");