react-native-tvos

react-native-tvos

Apple TV and Android TV support for React Native are maintained here and in the corresponding react-native-tvos NPM package, and not in the core repo. This is a full fork of the main repository, with only the changes needed to support Apple TV and Android TV.

Releases of react-native-tvos will be based on a public release of react-native; e.g. the 0.76.0-0 release of this package will be derived from the 0.76.0 release of react-native. All releases of this repo will follow the 0.xx.x-y format, where x digits are from a specific RN core release, and y represents the additional versioning from this repo.

Releases will be published on npmjs.org and you may find the latest release version here: https://www.npmjs.com/package/react-native-tvos?activeTab=versions or use the tag @latest

You will find the relevant tvOS support and maintenance within the branches marked tvos-v0.xx.x;

To build your project for Apple TV, you should change your package.json imports to import react-native as follows, so that this package is used instead of the core react-native package.

"react-native": "npm:react-native-tvos@latest",

You cannot use this package and the core react-native package simultaneously in a project.

This README covers only TV-specific features. For more general documentation and for changes between versions, you should also see these resources:

• React Native documentation: https://reactnative.dev
• The React Native changelog: https://github.com/facebook/react-native/blob/main/CHANGELOG.md

Hermes JS support

• As of the 0.71 release, Hermes is fully working on both Apple TV and Android TV, and is enabled by default.

React Native new architecture (Fabric) support

React Native TV 0.76 enables the New Architecture by default. You can read more about it in this blog post from the RN core team: The New Architecture Is Here

If, for any reason, the New Architecture is not behaving properly in your application, there is always the option to opt-out from it until you are ready to turn it on again.

To opt-out from the New Architecture:

• Expo apps: RN 0.76 will be supported in SDK 52. See the SDK 52 beta release notes for more information on new arch support in Expo.

• Apple TV: You can reinstall the dependencies by running the command:

RCT_NEW_ARCH_ENABLED=0 bundle exec pod install

• Android TV: On Android, modify the android/gradle.properties file and turn off the newArchEnabled flag, then do a clean rebuild:

-newArchEnabled=true
+newArchEnabled=false

Typescript

Typescript types for TV-specific components and APIs have been added to types/public.

General support for TV

TV device support has been implemented with the intention of making existing React Native applications "just work" on TV, with few or no changes needed in the JavaScript code for the applications.

The RNTester app supports Apple TV and Android TV. In this repo, RNTester/Podfile and RNTester/RNTesterPods.xcodeproj have been modified to work for tvOS.

Minimum operating system versions:

• Apple TV:
  • tvOS 13.4 (for the 0.74 and 0.75 releases)
  • tvOS 15.1 (for the 0.76 release)
• Android TV:
  • API level 23 (for the 0.74 and 0.75 releases)
  • API level 24 (for the 0.76 release)

Build changes

• Native layer for Apple TV: Changes in the React Native podspecs (in 0.73 and later) require that your application Podfile only have one target. This repo supports either an iOS target or a tvOS target.
• Maven artifacts for Android TV: In 0.71 and later releases, the React Native Android prebuilt archives are published to Maven instead of being included in the NPM. We are following the same model, except that the Maven artifacts will be in group io.github.react-native-tvos instead of com.facebook.react. The @react-native/gradle-plugin module has been upgraded so that the Android dependencies will be detected correctly during build.

TV project creation in React Native 0.75 and later

Warning: Make sure you do not globally install react-native or react-native-tvos. If you have done this the wrong way, you may get error messages like ld: library not found for -lPods-TestApp-tvOS.

We strongly recommend Yarn as the package manager.

Using the Expo SDK with TV apps

As of React Native version 0.75.x, the core team recommends Expo for new projects.

See the Building Expo apps for TV guide from Expo for details on how to set up a new Expo project, including supported Expo modules and limitations.

Using Expo's continuous native generation (CNG) model, projects created this way can be used to build either mobile or TV apps, taking advantage of the full support for both mobile and TV platforms in this repo.

Project creation using the React Native Community CLI

As of React Native 0.75.x, the template that used to reside in the react-native core package has been moved to a new community repo and will be maintained there. To support developers that wish to continue using the community CLI, we have created a new TV template repository and will maintain a TV port of this template.

Note: The new TV template will only build apps for Apple TV and Android TV. Multiple platform targets are no longer supported in React Native app Podfiles.

To create a new project for RNTV 0.76:

# 
# Init an app called 'TVTest', note that you must not be in a node module (directory with node_modules sub-directory) for this to work
$ npx @react-native-community/cli@latest init TVTest --template @react-native-tvos/template-tv
                                                          
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              Welcome to React Native 0.76!                
                 Learn once, write anywhere               

✔ Downloading template
✔ Copying template
✔ Processing template
✔ Installing dependencies
✔ Do you want to install CocoaPods now? Only needed if you run your project in Xcode directly … yes
✔ Installing Ruby Gems
✔ Installing CocoaPods dependencies  (this may take a few minutes)
.
.
.
$ cd TVTest
# Now build and start the app in the tvOS Simulator - this will only work on a macOS machine.
npx react-native run-ios --simulator "Apple TV"
# This command builds and starts the app in an Android TV emulator (needs to be created in advance).
npx react-native run:android --device tv_api_31

How to support TV specific file extensions

The template contains an example Metro configuration that allows Metro to resolve application source files with TV-specific code, indicated by specific file extensions (e.g. *.ios.tv.tsx, *.android.tv.tsx, *.tv.tsx). The config will work the same way with the other standard source file extensions (.js, etc.), as documented in Metro docs

When this is enabled, Metro will resolve files in the following order of preference (and similarly for the other supported file extensions):

• file.ios.tv.tsx or file.android.tv.tsx
• file.tv.tsx
• file.ios.tsx or file.android.tsx
• file.tsx

This config is not enabled by default, since it will impact bundling performance, but is available for developers who need this capability.

Code changes

• JavaScript layer: Support for TV has been added to the Platform React Native API.

var Platform = require('Platform');
var running_on_tv = Platform.isTV;

// If you want to be more specific and only detect devices running tvOS
// (but no Android TV devices) you can use:
var running_on_apple_tv = Platform.isTVOS;

• Common codebase for iOS and tvOS: Since tvOS and iOS share most Objective-C and JavaScript code in common, most documentation for iOS applies equally to tvOS. Apple TV specific changes in native code are all wrapped by the TARGET_OS_TV define. These include changes to suppress APIs that are not supported on tvOS (e.g. web views, sliders, switches, status bar, etc.), and changes to support user input from the TV remote or keyboard.

• Common codebase for Android phone and Android TV: Apps built for Android using this repo will run on both Android phone and Android TV. Most of the changes for TV are specific to handling focus-based navigation on a TV using the D-Pad on the remote control.

• Pressable and Touchable controls: In RNTV 0.76.1-1 and later, TV controls are supported with fully native events. Code has been added to detect focus changes and use existing methods to style the components properly and initiate the proper actions when the view is selected using the TV remote, so Pressable, TouchableHighlight and TouchableOpacity will "just work" on both Apple TV and Android TV. In particular:

  • onFocus() will be executed when the touchable view goes into focus
  • onBlur() will be executed when the touchable view goes out of focus
  • onPress() will be executed when the touchable view is actually selected by pressing the "select" button on the TV remote (center button on Apple TV remote, or center button on Android TV DPad).
  • onPressIn() will be executed when the TV remote "select" button is pressed down (center button on Apple TV remote, or center button on Android TV DPad)
  • onPressOut() will be executed when the TV remote "select" button is released
  • onLongPress() will be executed if the "select" button is held down for a length of time (this event is generated in the Pressability module, the same as for touchscreen long press events).

  TouchableNativeFeedback and TouchableWithoutFeedback respond to press events, but do not respond to focus and blur events, and are not recommended for TV.

Because focus and blur events are now fully native core events, they will respond correctly to capturing and bubbling event handlers in View components. A demo of this has been added to the TVEventHandlerExample in RNTester.

• Tailwind styles for Pressable and Touchable controls: The above events allow RNTV to support the focus: and active: pseudo classes for Tailwind styles.

• TV remote/keyboard input: Application code that needs to implement custom handling of TV remote events can create an instance of TVEventHandler and listen for these events. For a more convenient API, we provide useTVEventHandler.

import { TVEventHandler, useTVEventHandler } from 'react-native';

// Functional component

const TVEventHandlerView: () => React.Node = () => {
  const [lastEventType, setLastEventType] = React.useState('');

  const myTVEventHandler = evt => {
    setLastEventType(evt.eventType);
  };

  useTVEventHandler(myTVEventHandler);

  return (
    <View>
      <TouchableOpacity onPress={() => {}}>
        <Text>
          This example enables an instance of TVEventHandler to show the last
          event detected from the Apple TV Siri remote or from a keyboard.
        </Text>
      </TouchableOpacity>
      <Text style={{color: 'blue'}}>{lastEventType}</Text>
    </View>
  );

};

// Class based component

class Game2048 extends React.Component {
  _tvEventHandlerSubscription: EventSubscription || undefined;

  _enableTVEventHandler() {
    this._tvEventHandlerSubscription = TVEventHandler.addListener(function(evt) {
      if (evt && evt.eventType === 'right') {
        cmp.setState({board: cmp.state.board.move(2)});
      } else if(evt && evt.eventType === 'up') {
        cmp.setState({board: cmp.state.board.move(1)});
      } else if(evt && evt.eventType === 'left') {
        cmp.setState({board: cmp.state.board.move(0)});
      } else if(evt && evt.eventType === 'down') {
        cmp.setState({board: cmp.state.board.move(3)});
      } else if(evt && evt.eventType === 'playPause') {
        cmp.restartGame();
      }
    });
  }

  _disableTVEventHandler() {
    if (this._tvEventHandlerSubscription) {
      this._tvEventHandlerSubscription.remove();
      delete this._tvEventHandlerSubscription;
    }
  }

  componentDidMount() {
    this._enableTVEventHandler();
  }

  componentWillUnmount() {
    this._disableTVEventHandler();
  }

• LogBox: The LogBox error/warning display (which replaced YellowBox in 0.63) is working as expected on TV platforms, after a few adjustments to make the controls accessible to the focus engine.

• Dev Menu support: On the Apple TV simulator, cmd-D will bring up the developer menu, just like on iOS. To bring it up on a real Apple TV device, make a long press on the play/pause button on the remote. (Please do not shake the Apple TV device, that will not work :) ). Android TV dev menu behavior is the same as on Android phone.

• TV remote animations on Apple TV: RCTTVView native code implements Apple-recommended parallax animations to help guide the eye as the user navigates through views. The animations can be disabled or adjusted with new optional view properties.

• Back navigation with the TV remote menu button: The BackHandler component, originally written to support the Android back button, now also supports back navigation on the Apple TV using the menu button or '<' button on the Apple TV remote, and the back button as usual on Android TV remote.

• TVEventControl for AppleTV: (Formerly "TVMenuControl") This module provides methods to enable and disable features on the Apple TV Siri remote:

  • enableTVMenuKey/disableTVMenuKey: Method to enable and disable the menu key gesture recognizer, in order to fix an issue with Apple's guidelines for menu key navigation (see https://github.com/facebook/react-native/issues/18930). The RNTester app uses these methods to implement correct menu key behavior for back navigation.
  • enableTVPanGesture/disableTVPanGesture: Methods to enable and disable detection of finger touches that pan across the touch surface of the Siri remote. See TVEventHandlerExample in the RNTester app for a demo.
  • enableGestureHandlersCancelTouches/disableGestureHandlersCancelTouches: Methods to turn on and turn off cancellation of touches by the gesture handlers in RCTTVRemoteHandler (see #366). Cancellation of touches is turned on (enabled) by default in 0.69 and earlier releases.

• Accessibility: We have an additional accessibilityFocus accessibility action on Android that you can use for detecting focus changes on every accessible element (like a regular Text) when TalkBack is enabled.

• TVFocusGuideView: This component provides support for Apple's UIFocusGuide API and is implemented in the same way for Android TV, to help ensure that focusable controls can be navigated to, even if they are not directly in line with other controls. An example is provided in RNTester that shows two different ways of using this component.

  Prop	Value	Description
  destinations	any[]?	Array of Components to register as destinations of the FocusGuideView
  autoFocus	boolean?	If true, TVFocusGuide will automatically manage focus for you. It will redirect the focus to the first focusable child on the first visit. It also remembers the last focused child and redirects the focus to it on the subsequent visits. destinations prop takes precedence over this prop when used together.
  focusable	boolean?	When set to false, this view and all its subviews will be NOT focusable.
  trapFocus* (Up, Down, Left, Right)	Prevents focus escaping from the container for the given directions.

  More information on the focus handling improvements above can be found in this article.

  • Next Focus Direction: the props nextFocus* on View should work as expected on iOS too (previously android only). One caveat is that if there is no focusable in the nextFocusable* direction next to the starting view, iOS doesn't check if we want to override the destination.

  • TVTextScrollView: On Apple TV, a ScrollView will not scroll unless there are focusable items inside it or above/below it. This component wraps ScrollView and uses tvOS-specific native code to allow scrolling using swipe gestures from the remote control.

  • VirtualizedList: We extend VirtualizedList to make virtualization work well with focus management in mind. All of the improvements that we made are automatically available to all the VirtualizedList based components such as FlatList.

    • Defaults: VirtualizeList contents are automatically wrapped with a TVFocusGuideView with trapFocus* properties enabled depending on the orientation of the list. This default makes sure that focus doesn't leave the list accidentally due to a virtualization issue etc. until reaching the beginning or the end of the list.
    • New Props:

  Prop	Value	Description
  additionalRenderRegions	{first: number; last: number;}[]?	Array of RenderRegions that allows you to define regions in the list that are not subject to virtualization, ensuring they are always rendered. This is particularly useful for preventing blank areas in critical parts of the list. These regions are rendered lazily after the initial render and are specified as an array of objects, each with first and last indices marking the beginning and end of the non-virtualized region based on index. See the feature proposal for more context.