How to assign self to another class object, while navigating to another view controller with out segue

Question

I am using below code to navigate to another view controller, i want to assign this self to a delegate of another class, how do i do it ?

UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];

UINavigationController *controller = [storyboard instantiateViewControllerWithIdentifier:@"storyBoardID"];

self.navigationController presentViewController:controller animated:YES completion:nil];

Answer 1

Get your view Controller from Navigation Controller

UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];

UINavigationController *controller = [storyboard instantiateViewControllerWithIdentifier:@"navigationControllerID"];

TargetVC *targetVC = (TargetVC *)controller.viewControllers.firstObject
   //OR
TargetVC *targetVC = (TargetVC *)controller.topViewController;

targetVC.mydelegate = self;

[self.navigationController presentViewController:controller animated:YES completion:nil];

Get your view Controller from TabBar Controller

   UITabBarController *homeTabBar=[[UIStoryboard storyboardWithName:@"Main" bundle:nil] instantiateViewControllerWithIdentifier:@"homeTabBarID"];

   TargetVC *targetVC =nil;

   UINavigationController *nav = [homeTabBar.viewControllers objectAtIndex:0];

  //if you have multiple tab then you can give Index as per your ViewController
   targetVC =(TargetVC*)[nav.viewControllers objectAtIndex:0];

   targetVC.mydelegate = self;

   [self.navigationController presentViewController:homeTabBar animated:YES completion:nil];