init.m

[[Branch getInstance] initSessionWithLaunchOptions:launchOptions andRegisterDeepLinkHandler:^(NSDictionary *deepLinkParams, NSError *error) {
    if (!error) {
      NSLog(@"finished init with params = %@", [deepLinkParams description]);
      if ([deepLinkParams objectForKey:@"monster_id"]) {
        UINavigationController *navController = (UINavigationController *)self.window.rootViewController;
        NSString * storyboardName = @"Main";
        UIStoryboard *storyboard = [UIStoryboard storyboardWithName:storyboardName bundle: nil];
        UIViewController *nextVC = [storyboard instantiateViewControllerWithIdentifier:@"MonsterViewController"];
        [navController setViewControllers:@[nextVC] animated:YES];
      }
    } else {
      NSLog(@"failed init: %@", error);
    }
}];