AppDelegate.m

...

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

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
#if DEBUG
  FlipperClient *client = [FlipperClient sharedClient];
  SKDescriptorMapper *mapper = [[SKDescriptorMapper alloc] initWithDefaults];
  [client addPlugin:[[FlipperKitLayoutPlugin alloc] initWithRootNode:application withDescriptorMapper:mapper]];
  [client addPlugin:[[FKUserDefaultsPlugin alloc] initWithSuiteName:nil]];  [client start];
  [client addPlugin: [[FlipperKitNetworkPlugin alloc] initWithNetworkAdapter:[SKIOSNetworkAdapter new]]];
  [client start];
#endif
  
  ...
}

Podfile

  ...

  pod 'FlipperKit', :configurations => ['Debug']
  pod 'FlipperKit/FlipperKitLayoutPlugin', :configurations => ['Debug']
  pod 'FlipperKit/SKIOSNetworkPlugin', :configurations => ['Debug']
  pod 'FlipperKit/FlipperKitUserDefaultsPlugin', :configurations => ['Debug']