message: Copied over setup sample from native docs
diff: */
  #import "AppDelegate.h"
  -#import "NVSceneController.h"
  -
  #import <React/RCTBundleURLProvider.h>
  #import <React/RCTRootView.h>
  +#import "NVSceneController.h"
  @implementation AppDelegate
  - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
  {
  - NSURL *jsCodeLocation;
  -
  - jsCodeLocation = [[RCTBundleURLProvider sharedSettings] jsBundleURLForBundleRoot:@"index" fallbackResource:nil];
  + NSURL *jsCodeLocation = [[RCTBundleURLProvider sharedSettings] jsBundleURLForBundleRoot:@"index" fallbackResource:nil];
  self.bridge = [[RCTBridge alloc] initWithBundleURL:jsCodeLocation moduleProvider:nil launchOptions:launchOptions];
  -
  self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
  - UIViewController *homeViewController = [[NVSceneController alloc] init: 0 tab: 0 title: @"Home" appKey: @"twitter"];
  - UINavigationController *homeController = [[UINavigationController alloc] initWithRootViewController:homeViewController];
  - homeController.tabBarItem = [[UITabBarItem alloc] initWithTitle:@"Home" image:nil tag:1];
  + NSArray *tabs = @[@"Home", @"Notifications"];
  + NSString *appKey = @"twitter";
  - UIViewController *notificationsViewController = [[NVSceneController alloc] init: 0 tab: 1 title: @"Notifications" appKey: @"twitter"];
  - UINavigationController *notificationsController = [[UINavigationController alloc] initWithRootViewController:notificationsViewController];
  - notificationsController.tabBarItem = [[UITabBarItem alloc] initWithTitle:@"Notifications" image:nil tag:1];
  + NSMutableArray *controllers = [[NSMutableArray alloc] init];
  + for(NSInteger tab = 0; tab < [tabs count]; tab++) {
  + UIViewController *sceneController = [[NVSceneController alloc] init:0 tab:tab title:tabs[tab] appKey:appKey];
  + UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:sceneController];
  + navigationController.tabBarItem = [[UITabBarItem alloc] initWithTitle:tabs[tab] image:nil tag:tab];
  + [controllers addObject:navigationController];
  + }
  UITabBarController *tabBarController = [[UITabBarController alloc] init];
  - [tabBarController setViewControllers:@[homeController, notificationsController]];
  + [tabBarController setViewControllers:controllers];
  self.window.rootViewController = tabBarController;
  [self.window makeKeyAndVisible];
  return YES;
  