Instalación y configuración en plataformas de Apple
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Firebase Realtime Database es una base de datos alojada en la nube. Los datos se almacenan en formato JSON y se sincronizan en tiempo real con cada cliente conectado. Cuando compilas
apps multiplataforma con nuestros SDK de Android, iOS y JavaScript, todos tus
clientes comparten una instancia de Realtime Database y reciben actualizaciones automáticamente con
los datos más recientes.
Firebase Realtime Database está disponible en todas las plataformas de Apple, incluidos iOS,
macOS, Mac Catalyst, tvOS y watchOS. No está disponible para App Clips.
Las instrucciones de configuración de esta página
hacen referencia a iOS en ejemplos específicos, pero son genéricas y funcionan en cualquier
plataforma de Apple.
Ve a la sección Realtime Database de
Firebase console.
Se te pedirá que selecciones un proyecto de Firebase existente.
Sigue el flujo de trabajo para crear la base de datos.
Selecciona un modo de inicio para tu Firebase Security Rules:
Modo de prueba
Es bueno para comenzar con las bibliotecas cliente móviles y web, pero permite que todos lean tus datos y los reemplacen. Después de que realices las pruebas, asegúrate
de revisar la sección Comprende las reglas de seguridad de Firebase Realtime Database.
Si quieres comenzar a usar los SDK de Apple, Android o la Web, selecciona el modo de prueba.
Modo bloqueado
Rechaza todas las operaciones de lectura y escritura de clientes móviles y web.
Tus servidores de aplicaciones autenticados aún pueden acceder a tu base de datos.
Usa Swift Package Manager para instalar y administrar las dependencias de Firebase.
En Xcode, con tu proyecto de app abierto, navega a File > Add Packages.
Cuando se te solicite, agrega el repositorio del SDK de Firebase para plataformas de Apple:
https://github.com/firebase/firebase-ios-sdk.git
Elige la biblioteca de Realtime Database.
Agrega la marca -ObjC a la sección Other Linker Flags de la configuración de compilación de tu destino.
Cuando termines, Xcode comenzará a resolver y descargar automáticamente tus
dependencias en segundo plano.
Configurar Realtime Database Security Rules
Realtime Database proporciona un lenguaje de reglas declarativas que te permite
definir cómo se deben estructurar los datos, cómo se deben indexar y cuándo
se pueden leer y escribir.
Configurar Firebase Realtime Database
Debes inicializar Firebase antes de crear o usar cualquier referencia de la app de Firebase. Si ya lo hiciste con otra función de Firebase, puedes omitir
este paso.
Importa el módulo FirebaseCore en tu
UIApplicationDelegate, así como cualquier otro
módulo de Firebase que use el delegado de la app.
Por ejemplo, para usar Cloud Firestore y Authentication:
Configura una instancia compartida de
FirebaseApp
en el método application(_:didFinishLaunchingWithOptions:)
del delegado de la app:
SwiftUI
// Use Firebase library to configure APIsFirebaseApp.configure()
Swift
// Use Firebase library to configure APIsFirebaseApp.configure()
Objective-C
// Use Firebase library to configure APIs[FIRAppconfigure];
Si usas SwiftUI, debes crear un delegado de la aplicación y adjuntarlo
al struct de tu App a través de UIApplicationDelegateAdaptor o
NSApplicationDelegateAdaptor. También debes inhabilitar el swizzling del delegado de la app. Para
obtener más información, consulta las instrucciones de SwiftUI.
SwiftUI
@mainstructYourApp:App{// register app delegate for Firebase setup@UIApplicationDelegateAdaptor(AppDelegate.self)vardelegatevarbody:someScene{WindowGroup{NavigationView{ContentView()}}}}
Crea una referencia a tu base de datos y especifica la ubicación en la que deseas
escribir.
Supervisa el panel Uso y facturación en la consola de Firebase para obtener un panorama general del uso de tu proyecto en varios servicios de Firebase.
También puedes visitar el panel Uso deRealtime Database para obtener información de uso más detallada.
[null,null,["Última actualización: 2025-08-16 (UTC)"],[],[],null,["\u003cbr /\u003e\n\nThe Firebase Realtime Database is a cloud-hosted database. Data is stored as JSON\nand synchronized in realtime to every connected client. When you build\ncross-platform apps with our Android, iOS, and JavaScript SDKs, all of your\nclients share one Realtime Database instance and automatically receive updates with\nthe newest data.\n\nFirebase Realtime Database is available on all Apple platforms, including iOS,\nmacOS, macOS Catalyst, tvOS, and watchOS. It is not available for App Clips.\nThe setup instructions in this page reference iOS in specific examples, but are\ngeneric and work for any Apple platform target.\n\nPrerequisites\n\n1. [Install the Firebase SDK](/docs/ios/setup).\n2. Add your app to your Firebase project in the [Firebase console](//console.firebase.google.com/).\n\nCreate a Database\n\n1. Navigate to the **Realtime Database** section of the\n [Firebase console](https://console.firebase.google.com/project/_/database).\n You'll be prompted to select an existing Firebase project.\n Follow the database creation workflow.\n\n2. Select a starting mode for your Firebase Security Rules:\n\n Test mode\n\n : Good for getting started with the mobile and web client libraries,\n but allows anyone to read and overwrite your data. After testing, **make\n sure to review the [Understand Firebase Realtime Database Rules](/docs/database/security)\n section.**\n\n :\n | **Note:** If you create a database in Test mode and make no changes to the default world-readable and world-writeable Rules within a trial period, you will be alerted by email, then your database rules will deny all requests. Note the expiration date during the Firebase console setup flow.\n\n : To get started with the web, Apple, or Android SDK, select testmode.\n\n Locked mode\n\n : Denies all reads and writes from mobile and web clients.\n Your authenticated application servers can still access your database.\n\n3. Choose a location for the database.\n\n Depending on the\n [location of the database](/docs/projects/locations#rtdb-locations), the\n URL for the new database will be in one of the following forms:\n - \u003cvar translate=\"no\"\u003eDATABASE_NAME\u003c/var\u003e`.firebaseio.com` (for\n databases in `us-central1`)\n\n - \u003cvar translate=\"no\"\u003eDATABASE_NAME\u003c/var\u003e`.`\u003cvar translate=\"no\"\u003eREGION\u003c/var\u003e`.firebasedatabase.app`\n (for databases in all other locations)\n\n4. Click **Done**.\n\nWhen you enable Realtime Database, it also enables the API in the\n[Cloud API Manager](https://console.cloud.google.com/projectselector/apis/api/firebasedatabase.googleapis.com/overview).\n\nAdd Firebase Realtime Database to your app\n\nUse Swift Package Manager to install and manage Firebase dependencies.\n| Visit [our installation guide](/docs/ios/installation-methods) to learn about the different ways you can add Firebase SDKs to your Apple project, including importing frameworks directly and using CocoaPods.\n\n1. In Xcode, with your app project open, navigate to **File \\\u003e Add Packages**.\n2. When prompted, add the Firebase Apple platforms SDK repository: \n\n```text\n https://github.com/firebase/firebase-ios-sdk.git\n```\n| **Note:** New projects should use the default (latest) SDK version, but you can choose an older version if needed.\n3. Choose the Realtime Database library.\n4. Add the `-ObjC` flag to the *Other Linker Flags* section of your target's build settings.\n5. When finished, Xcode will automatically begin resolving and downloading your dependencies in the background.\n\nConfigure Realtime Database Security Rules\n\nThe Realtime Database provides a declarative rules language that allows you to\ndefine how your data should be structured, how it should be indexed, and when\nyour data can be read from and written to.\n| **Note:** By default, read and write access to your database is restricted so only authenticated users can read or write data. To get started without setting up [Authentication](/docs/auth), you can [configure your rules for public access](/docs/rules/basics#default_rules_locked_mode). This does make your database open to anyone, even people not using your app, so be sure to restrict your database again when you set up authentication.\n\nSet up Firebase Realtime Database\n\nYou must initialize Firebase before any Firebase app reference is created or\nused. If you have already done this for another Firebase feature, you can skip\nthis step.\n\n1. Import the `FirebaseCore` module in your `UIApplicationDelegate`, as well as any other [Firebase modules](/docs/ios/setup#available-pods) your app delegate uses. For example, to use Cloud Firestore and Authentication: \n\n SwiftUI \n\n ```swift\n import SwiftUI\n import FirebaseCore\n import FirebaseFirestore\n import FirebaseAuth\n // ...\n \n ```\n\n Swift \n\n ```swift\n import FirebaseCore\n import FirebaseFirestore\n import FirebaseAuth\n // ...\n \n ```\n\n Objective-C \n\n ```objective-c\n @import FirebaseCore;\n @import FirebaseFirestore;\n @import FirebaseAuth;\n // ...\n \n ```\n2. Configure a [`FirebaseApp`](/docs/reference/swift/firebasecore/api/reference/Classes/FirebaseApp) shared instance in your app delegate's `application(_:didFinishLaunchingWithOptions:)` method: \n\n SwiftUI \n\n ```swift\n // Use Firebase library to configure APIs\n FirebaseApp.configure()\n ```\n\n Swift \n\n ```swift\n // Use Firebase library to configure APIs\n FirebaseApp.configure()\n ```\n\n Objective-C \n\n ```objective-c\n // Use Firebase library to configure APIs\n [FIRApp configure];\n ```\n3. If you're using SwiftUI, you must create an application delegate and attach it to your `App` struct via `UIApplicationDelegateAdaptor` or `NSApplicationDelegateAdaptor`. You must also disable app delegate swizzling. For more information, see the [SwiftUI instructions](/docs/ios/learn-more#swiftui). \n\n SwiftUI \n\n ```swift\n @main\n struct YourApp: App {\n // register app delegate for Firebase setup\n @UIApplicationDelegateAdaptor(AppDelegate.self) var delegate\n\n var body: some Scene {\n WindowGroup {\n NavigationView {\n ContentView()\n }\n }\n }\n }\n \n ```\n4. Create a reference to your database and specify the location you want to write to. **Important** : To get a reference to a database other than a `us-central1` default database, you must pass the database URL to `database()` (or for Objective-C `databaseWithURL`). For a `us-central1` default database, you can call `database()` (or `database`) without arguments.\n |\n | You can find your Realtime Database URL in the *Realtime Database* section of the\n | [Firebase console](//console.firebase.google.com/). Depending on the\n | [location of the database](/docs/projects/locations#rtdb-locations),\n | the database URL will be in one of the following forms:\n | - `https://`\u003cvar translate=\"no\"\u003eDATABASE_NAME\u003c/var\u003e`.firebaseio.com` (for databases in `us-central1`)\n | - `https://`\u003cvar translate=\"no\"\u003eDATABASE_NAME\u003c/var\u003e`.`\u003cvar translate=\"no\"\u003eREGION\u003c/var\u003e`.firebasedatabase.app` (for databases in all other locations)\n\n Swift \n **Note:** This Firebase product is not available on the App Clip target. \n\n ```swift\n var ref: DatabaseReference!\n\n ref = Database.database().reference()\n ```\n\n Objective-C \n **Note:** This Firebase product is not available on the App Clip target. \n\n ```objective-c\n @property (strong, nonatomic) FIRDatabaseReference *ref;\n\n self.ref = [[FIRDatabase database] reference];\n ```\n\nNext Steps\n\n- Learn how to [structure data](/docs/database/ios/structure-data) for Realtime Database.\n\n- [Scale your data across multiple database\n instances.](/docs/database/usage/sharding)\n\n- [Read and write data.](/docs/database/ios/read-and-write)\n\n- [View your database in the\n Firebase console.](//console.firebase.google.com/project/_/database/data)\n\n- Prepare to launch your app:\n\n - Enable [App Check](/docs/app-check/ios) to help ensure that only your\n apps can access your databases.\n\n - Set up [budget\n alerts](/docs/projects/billing/avoid-surprise-bills#set-up-budget-alert-emails)\n for your project in the Google Cloud console.\n\n - Monitor the [*Usage and billing*\n dashboard](//console.firebase.google.com/project/_/usage)\n in the Firebase console to get an overall picture of your project's\n usage across multiple Firebase services.\n You can also visit the [Realtime Database *Usage*\n dashboard](//console.firebase.google.com/project/_/database/usage) for more\n detailed usage information.\n\n - Review the [Firebase launch checklist](/support/guides/launch-checklist)."]]