flipper/docs/getting-started/react-native-ios.md

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react-native-ios	Manually set up your React Native iOS App	React Native for iOS

These instructions are aimed at people manually adding Flipper to a React Native 0.62+ app. This should only be necessary if you have an existing app that cannot be upgraded with the React Native Upgrade tool.

Dependencies

Add this code to your ios/Podfile:

platform :ios, '9.0'

def flipper_pods()
  flipperkit_version = '0.37.0'
  pod 'FlipperKit', '~>' + flipperkit_version, :configuration => 'Debug'
  pod 'FlipperKit/FlipperKitLayoutPlugin', '~>' + flipperkit_version, :configuration => 'Debug'
  pod 'FlipperKit/SKIOSNetworkPlugin', '~>' + flipperkit_version, :configuration => 'Debug'
  pod 'FlipperKit/FlipperKitUserDefaultsPlugin', '~>' + flipperkit_version, :configuration => 'Debug'
  pod 'FlipperKit/FlipperKitReactPlugin', '~>' + flipperkit_version, :configuration => 'Debug'
end

# Post Install processing for Flipper
def flipper_post_install(installer)
  installer.pods_project.targets.each do |target|
    if target.name == 'YogaKit'
      target.build_configurations.each do |config|
        config.build_settings['SWIFT_VERSION'] = '4.1'
      end
    end
  end
  file_name = Dir.glob("*.xcodeproj")[0]
  app_project = Xcodeproj::Project.open(file_name)
  app_project.native_targets.each do |target|
    target.build_configurations.each do |config|
      cflags = config.build_settings['OTHER_CFLAGS'] || '$(inherited) '
      unless cflags.include? '-DFB_SONARKIT_ENABLED=1'
        puts 'Adding -DFB_SONARKIT_ENABLED=1 in OTHER_CFLAGS...'
        cflags << '-DFB_SONARKIT_ENABLED=1'
      end
      config.build_settings['OTHER_CFLAGS'] = cflags
    end
    app_project.save
  end
  installer.pods_project.save
end

target 'your-app-name' do
  ...


  # Replace the existing yoga import with the following (adding modular_headers):
  pod 'Yoga', :path => '../node_modules/react-native/ReactCommon/yoga', :modular_headers => true

  ...
  use_native_modules!

  # For enabling Flipper.
  # Note that if you use_framework!, flipper will not work.
  # Disable these lines if you are doing use_framework!
  flipper_pods()
  post_install do |installer|
    flipper_post_install(installer)
  end
end

Install the dependencies by running cd ios && pod install. You can now import and initialize Flipper in your AppDelegate.

Initialization

The code below enables the following integrations:

• Layout Inspector
• Network
• Shared Preferences
• Crash Reporter

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

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
  [self initializeFlipper:application];
  ...
}

- (void) initializeFlipper:(UIApplication *)application {
  #if DEBUG
  #ifdef FB_SONARKIT_ENABLED
    FlipperClient *client = [FlipperClient sharedClient];
    SKDescriptorMapper *layoutDescriptorMapper = [[SKDescriptorMapper alloc] initWithDefaults];
    [client addPlugin: [[FlipperKitLayoutPlugin alloc] initWithRootNode: application withDescriptorMapper: layoutDescriptorMapper]];
    [client addPlugin: [[FKUserDefaultsPlugin alloc] initWithSuiteName:nil]];
    [client addPlugin: [FlipperKitReactPlugin new]];
    [client addPlugin: [[FlipperKitNetworkPlugin alloc] initWithNetworkAdapter:[SKIOSNetworkAdapter new]]];
    [client start];
  #endif
  #endif
}

@end

...
#if DEBUG
#if FB_SONARKIT_ENABLED
import FlipperKit
#endif
#endif

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

  func application(
      _ application: UIApplication,
      didFinishLaunchingWithOptions
      launchOptions: [UIApplication.LaunchOptionsKey: Any]?
    ) -> Bool {
    initializeFlipper(with: application)
    ...
  }

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

Lastly, open the Flipper desktop app, and run yarn ios in your terminal.

Troubleshooting

If you can't build your app after adding Flipper, you may need to configure the Swift compiler. To do so, adding an empty Swift file in your project is the easiest way.

Further Steps

To create your own plugins and integrate with Flipper using JavaScript, check out our writing plugins for React Native tutorial!