didselect viewcontroller not called swift

 Problem:

didselect viewcontroller not called swift for my tabbar view controller

Solution:

import Foundation

import UIKit

class TabBarVC:UITabBarController {

    

    override func viewDidLoad() {

    }

    override func tabBar(_ tabBar: UITabBar, didSelect item: UITabBarItem) {

       if let vc = self.viewControllers?[self.selectedIndex] as? MyVC {

           vc.refresh()

        }

    }

  

}