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FirebaseMessaging Framework Reference

FIRMessaging


@interface FIRMessaging : NSObject

Firebase Messaging lets you reliably deliver messages at no cost.

To send or receive messages, the app must get a registration token. This token authorizes an app server to send messages to an app instance.

In order to handle incoming Messaging messages, set the UNUserNotificationCenter‘s delegate property and implement the appropriate methods.

  • Delegate to handle FCM token refreshes, and remote data messages received via FCM direct channel.

    Declaration

    Objective-C

    @property (nonatomic, weak, nullable) id<FIRMessagingDelegate> delegate;

  • FIRMessaging

    Declaration

    Objective-C

    + (nonnull instancetype)messaging;

    Return Value

    An instance of Messaging.

  • Unavailable

    Use +messaging instead.

    Unavailable. Use +messaging instead.

    Declaration

    Objective-C

    - (nonnull instancetype)init;

APNs

  • This property is used to set the APNs Token received by the application delegate.

    Messaging uses method swizzling to ensure that the APNs token is set automatically. However, if you have disabled swizzling by setting FirebaseAppDelegateProxyEnabled to NO in your app’s Info.plist, you should manually set the APNs token in your application delegate’s application(_:didRegisterForRemoteNotificationsWithDeviceToken:) method.

    If you would like to set the type of the APNs token, rather than relying on automatic detection, see setAPNSToken(_:type:).

    Declaration

    Objective-C

    @property (nonatomic, copy, nullable) NSData *APNSToken;

  • Set the APNs token for the application. This token will be used to register with Firebase Messaging, and will be associated with the app’s installation ID in the form of an FCM token.

    Declaration

    Objective-C

    - (void)setAPNSToken:(nonnull NSData *)apnsToken
                type:(FIRMessagingAPNSTokenType)type;

    Parameters

    apnsToken

    The APNs token for the application.
    type

    The type of APNs token. Debug builds should use MessagingAPNSTokenTypeSandbox. Alternatively, you can supply MessagingAPNSTokenTypeUnknown to have the type automatically detected based on your provisioning profile.

FCM Tokens

  • Is Firebase Messaging token auto generation enabled? If this flag is disabled, Firebase Messaging will not generate an FCM token automatically for message delivery.

    If this flag is disabled, Firebase Messaging does not generate new tokens automatically for message delivery. If this flag is enabled, FCM generates a registration token on application start when there is no existing valid token and periodically refreshes the token and sends data to the Firebase backend.

    This setting is persisted, and is applied on future invocations of your application. Once explicitly set, it overrides any settings in your Info.plist.

    By default, FCM automatic initialization is enabled. If you need to change the default (for example, because you want to prompt the user before getting a token), set FirebaseMessagingAutoInitEnabled to NO in your application’s Info.plist.

    Declaration

    Objective-C

    @property (nonatomic, assign, unsafe_unretained, readwrite,
          getter=isAutoInitEnabled) BOOL autoInitEnabled;

  • The FCM registration token is used to identify this device so that FCM can send notifications to it. It is associated with your APNs token when the APNs token is supplied, so messages sent to the FCM token will be delivered over APNs.

    The FCM registration token is sometimes refreshed automatically. In your Messaging delegate, the delegate method messaging(_:didReceiveRegistrationToken:) will be called once a token is available, or has been refreshed. Typically it should be called once per app start, but may be called more often if the token is invalidated or updated.

    Once you have an FCM registration token, you should send it to your application server, where it can be used to send notifications to your device.

    Declaration

    Objective-C

    @property (nonatomic, readonly, nullable) NSString *FCMToken;

  • Asynchronously gets the default FCM registration token.

    This creates a Firebase Installations ID, if one does not exist, and sends information about the application and the device to the Firebase backend. A network connection is required for the method to succeed. To stop this, see Messaging.isAutoInitEnabled, Messaging.delete(completion:) and Installations.delete(completion:).

    Declaration

    Objective-C

    - (void)tokenWithCompletion:(nonnull void (^)(NSString *_Nullable,
                                              NSError *_Nullable))completion;

    Parameters

    completion

    The completion handler to handle the token request.

  • Asynchronously deletes the default FCM registration token.

    This does not delete all tokens for non-default sender IDs, See Messaging.delete(completion:) for deleting all of them. To prevent token auto generation, see Messaging.isAutoInitEnabled.

    Declaration

    Objective-C

    - (void)deleteTokenWithCompletion:
    (nonnull void (^)(NSError *_Nullable))completion;

    Parameters

    completion

    The completion handler to handle the token deletion.

  • Retrieves an FCM registration token for a particular Sender ID. This can be used to allow multiple senders to send notifications to the same device. By providing a different Sender ID than your default when fetching a token, you can create a new FCM token which you can give to a different sender. Both tokens will deliver notifications to your device, and you can revoke a token when you need to.

    This registration token is not cached by FIRMessaging. FIRMessaging should have an APNs token set before calling this to ensure that notifications can be delivered via APNs using this FCM token. You may re-retrieve the FCM token once you have the APNs token set, to associate it with the FCM token. The default FCM token is automatically associated with the APNs token, if the APNs token data is available.

    This creates a Firebase Installations ID, if one does not exist, and sends information about the application and the device to the Firebase backend.

    Declaration

    Objective-C

    - (void)retrieveFCMTokenForSenderID:(nonnull NSString *)senderID
                         completion:
                             (nonnull void (^)(NSString *_Nullable,
                                               NSError *_Nullable))completion;

    Parameters

    senderID

    The Sender ID for a particular Firebase project.
    completion

    The completion handler to handle the token request.

  • Invalidates an FCM token for a particular Sender ID. That Sender ID cannot no longer send notifications to that FCM token. This does not delete the Firebase Installations ID that may have been created when generating the token. See Installations.delete(completion:).

    Declaration

    Objective-C

    - (void)deleteFCMTokenForSenderID:(nonnull NSString *)senderID
                       completion:
                           (nonnull void (^)(NSError *_Nullable))completion;

    Parameters

    senderID

    The senderID for a particular Firebase project.
    completion

    The completion handler to handle the token deletion.

Topics

  • Asynchronously subscribes to a topic. This uses the default FCM registration token to identify the app instance and periodically sends data to the Firebase backend. To stop this, see Messaging.delete(completion:) and Installations.delete(completion:).

    Declaration

    Objective-C

    - (void)subscribeToTopic:(nonnull NSString *)topic;

    Parameters

    topic

    The name of the topic, for example, @“sports”.

  • Asynchronously subscribe to the provided topic, retrying on failure. This uses the default FCM registration token to identify the app instance and periodically sends data to the Firebase backend. To stop this, see Messaging.delete(completion:) and Installations.delete(completion:).

    Declaration

    Objective-C

    - (void)subscribeToTopic:(nonnull NSString *)topic
              completion:(void (^_Nullable)(NSError *_Nullable))completion;

    Parameters

    topic

    The topic name to subscribe to, for example, @“sports”.
    completion

    The completion that is invoked once the subscribe call ends. On success, the error parameter is always nil. Otherwise, an appropriate error object is returned.

  • Asynchronously unsubscribe from a topic. This uses a FCM Token to identify the app instance and periodically sends data to the Firebase backend. To stop this, see Messaging.delete(completion:) and Installations.delete(completion:).

    Declaration

    Objective-C

    - (void)unsubscribeFromTopic:(nonnull NSString *)topic;

    Parameters

    topic

    The name of the topic, for example @“sports”.

  • Asynchronously unsubscribe from the provided topic, retrying on failure. This uses a FCM Token to identify the app instance and periodically sends data to the Firebase backend. To stop this, see Messaging.delete(completion:) and Installations.delete(completion:).

    Declaration

    Objective-C

    - (void)unsubscribeFromTopic:(nonnull NSString *)topic
                  completion:(void (^_Nullable)(NSError *_Nullable))completion;

    Parameters

    topic

    The topic name to unsubscribe from, for example @“sports”.
    completion

    The completion that is invoked once the unsubscribe call ends. In case of success, nil error is returned. Otherwise, an appropriate error object is returned.

Analytics

  • Use this to track message delivery and analytics for messages, typically when you receive a notification in application:didReceiveRemoteNotification:. However, you only need to call this if you set the FirebaseAppDelegateProxyEnabled flag to NO in your Info.plist. If FirebaseAppDelegateProxyEnabled is either missing or set to YES in your Info.plist, the library will call this automatically.

    Declaration

    Objective-C

    - (nonnull FIRMessagingMessageInfo *)appDidReceiveMessage:
    (nonnull NSDictionary *)message;

    Parameters

    message

    The downstream message received by the application.

    Return Value

    Information about the downstream message.

GDPR

  • Deletes all the tokens and checkin data of the Firebase project and related data on the server side. A network connection is required for the method to succeed.

    This does not delete the Firebase Installations ID. See Installations.delete(completion:). To prevent token auto generation, see Messaging.isAutoInitEnabled.

    Declaration

    Objective-C

    - (void)deleteDataWithCompletion:
    (nonnull void (^)(NSError *_Nullable))completion;

    Parameters

    completion

    A completion handler which is invoked when the operation completes. error == nil indicates success.

ExtensionHelper

  • Use the MessagingExtensionHelper to populate rich UI content for your notifications. For example, if an image URL is set in your notification payload or on the console, you can use the MessagingExtensionHelper instance returned from this method to render the image in your notification.

    Declaration

    Objective-C

    + (nonnull FIRMessagingExtensionHelper *)extensionHelper;

    Return Value

    An instance of MessagingExtensionHelper that handles the extensions API.