open viewcontroller from tab like in instagram camera page on IOS

Question

what i want is suppose to be simple, instagram middle tab on IOS opens the app\'s camera interface but not like the rest of the tabs but as an independet view controller and

Answer 1

SWIFT 4 Code

After subclassing the Tabbarcontroller as specified by @erparker above, use this code

 override func tabBar(_ tabBar: UITabBar, didSelect item: UITabBarItem) {
        if(item.tag==300){


            if let viewController = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "addNewTaskView") as? AddNewTaskViewController {

               self.present(viewController, animated: true, completion: nil)
            }

        }
    }

here, "Main" is the storyboard name which contains target view controller and "addNewTaskView" is the view controller storyboard Id given at the storyboard for a view controller.