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Using SceneDelegate with React Native

We will be swapping out the ObjC AppDelegate code with an Swift variant for SceneDelegate.

The Project name in this example is Example, which you should replace with your own project name.

1. Remove previous ObjC files

  • Delete main.m
  • Delete AppDelegate.h and AppDelegate.mm

2. Create the new Swift AppDelegate

Create a new AppDelegate.swift file, once prompted, click Create bridging headers for Swift.

Paste the following code to the AppDelegate.swift, it includes Flipper code.

// ios/AppDelegate.swift
import UIKit
import CarPlay
import React
#if DEBUG
#if FB_SONARKIT_ENABLED
import FlipperKit
#endif
#endif

@main
class AppDelegate: UIResponder, UIApplicationDelegate, RCTBridgeDelegate {

  var window: UIWindow?
  var bridge: RCTBridge?;
  var rootView: RCTRootView?;

  static var shared: AppDelegate { return UIApplication.shared.delegate as! AppDelegate }

  func sourceURL(for bridge: RCTBridge!) -> URL! {
    #if DEBUG
    return RCTBundleURLProvider.sharedSettings().jsBundleURL(forBundleRoot: "index");
    #else
    return Bundle.main.url(forResource:"main", withExtension:"jsbundle")
    #endif
  }

  func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
    initializeFlipper(with: application)
    self.bridge = RCTBridge.init(delegate: self, launchOptions: launchOptions)
    self.rootView = RCTRootView.init(bridge: self.bridge!, moduleName: "Example", initialProperties: nil)
    return true
  }

  func application(_ application: UIApplication, configurationForConnecting connectingSceneSession: UISceneSession, options: UIScene.ConnectionOptions) -> UISceneConfiguration {
    if (connectingSceneSession.role == UISceneSession.Role.carTemplateApplication) {
      let scene =  UISceneConfiguration(name: "CarPlay", sessionRole: connectingSceneSession.role)
      scene.delegateClass = CarSceneDelegate.self
      return scene
    } else {
      let scene =  UISceneConfiguration(name: "Phone", sessionRole: connectingSceneSession.role)
      scene.delegateClass = PhoneSceneDelegate.self
      return scene
    }
  }

  func application(_ application: UIApplication, didDiscardSceneSessions sceneSessions: Set<UISceneSession>) {
  }

  private func initializeFlipper(with application: UIApplication) {
    #if DEBUG
    #if FB_SONARKIT_ENABLED
    let client = FlipperClient.shared()
    let layoutDescriptorMapper = SKDescriptorMapper(defaults: ())
    client?.add(FlipperKitLayoutPlugin(rootNode: application, with: layoutDescriptorMapper!))
    client?.add(FKUserDefaultsPlugin(suiteName: nil))
    client?.add(FlipperKitReactPlugin())
    client?.add(FlipperKitNetworkPlugin(networkAdapter: SKIOSNetworkAdapter()))
    client?.start()
    #endif
    #endif
  }
}

Paste the following to your bridging header file Example-Bridging-Header.h:

// ios/Example-Bridging-Header.h
#import "RNCarPlay.h"

#ifdef DEBUG
#ifdef FB_SONARKIT_ENABLED
#import <FlipperKit/FlipperClient.h>
#import <FlipperKitLayoutPlugin/FlipperKitLayoutPlugin.h>
#import <FlipperKitUserDefaultsPlugin/FKUserDefaultsPlugin.h>
#import <FlipperKitNetworkPlugin/FlipperKitNetworkPlugin.h>
#import <SKIOSNetworkPlugin/SKIOSNetworkAdapter.h>
#import <FlipperKitReactPlugin/FlipperKitReactPlugin.h>
#endif
#endif

3. Add flags for Swift compiler in debug mode

Go to XCode project, hit Build Settings, search for Swift Compiler - Custom Flags and then under Active Compilation Conditions, add the following flags to Debug only:

  • DEBUG
  • FB_SONARKIT_ENABLED

4. Create Phone Scene

Add a new Swift file called PhoneScene.swift:

// ios/PhoneScene.swift
import Foundation
import UIKit
import SwiftUI

class PhoneSceneDelegate: UIResponder, UIWindowSceneDelegate {
  var window: UIWindow?
  func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
    guard let appDelegate = (UIApplication.shared.delegate as? AppDelegate) else { return }
    guard let windowScene = (scene as? UIWindowScene) else { return }

    let rootViewController = UIViewController()
    rootViewController.view = appDelegate.rootView;

    let window = UIWindow(windowScene: windowScene)
    window.rootViewController = rootViewController
    self.window = window
    window.makeKeyAndVisible()
  }
}

5. Create Car Scene

Add a new Swift file called CarScene.swift

// ios/CarScene.swift
import Foundation
import CarPlay

class CarSceneDelegate: UIResponder, CPTemplateApplicationSceneDelegate {
  func templateApplicationScene(_ templateApplicationScene: CPTemplateApplicationScene,
                                  didConnect interfaceController: CPInterfaceController) {
    RNCarPlay.connect(with: interfaceController, window: templateApplicationScene.carWindow);
  }

  func templateApplicationScene(_ templateApplicationScene: CPTemplateApplicationScene, didDisconnectInterfaceController interfaceController: CPInterfaceController) {
    RNCarPlay.disconnect()
  }
}

6. Update the manifest in Info.plist

Add the following ApplicationScene manifest to your Info.plist file.

	<key>UIApplicationSceneManifest</key>
	<dict>
		<key>UIApplicationSupportsMultipleScenes</key>
		<true/>
		<key>UISceneConfigurations</key>
		<dict>
			<key>CPTemplateApplicationSceneSessionRoleApplication</key>
			<array>
				<dict>
					<key>UISceneClassName</key>
					<string>CPTemplateApplicationScene</string>
					<key>UISceneConfigurationName</key>
					<string>CarPlay</string>
					<key>UISceneDelegateClassName</key>
					<string>$(PRODUCT_MODULE_NAME).CarSceneDelegate</string>
				</dict>
			</array>
			<key>UIWindowSceneSessionRoleApplication</key>
			<array>
				<dict>
					<key>UISceneClassName</key>
					<string>UIWindowScene</string>
					<key>UISceneConfigurationName</key>
					<string>Phone</string>
					<key>UISceneDelegateClassName</key>
					<string>$(PRODUCT_MODULE_NAME).PhoneSceneDelegate</string>
				</dict>
			</array>
		</dict>
	</dict>