Vfrdtyky

Swift: I have UITabBarController, with 8 tabs. When user select any tab including more tab, I want reset content of selected tab by Popping to rootView controller?

How could this be done?

I tried to reset navigation controllers in below methods, It works for tabs which are visible at bottom but it doesn't work for More tab.

tabBarController(_ tabBarController: UITabBarController, didSelect viewController: UIViewController) 



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

A clean way to do this:

func tabBarController(_ tabBarController: UITabBarController, didSelect viewController: UIViewController) {

    let index = tabBarController.selectedIndex

    if index == NSNotFound || index > 4 {

        tabBarController.moreNavigationController.popToRootViewController(animated: false)

        return

    }

    let navController = tabBarController.viewControllers?[tabBarController.selectedIndex] as? UINavigationController

    navController?.popToRootViewController(animated: false)

}

Create a custom class for your UITabViewContoller, set a delegate and put there that piece of code.

You can create a UITabBarController class for your tabBar and in that class ovveride the tabBar didSelect method from their on select of any tab you can popViewController

 class TabBarViewController: UITabBarController {

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

            let navigationController1 =  self.viewControllers![0] as? UINavigationController

            navigationController1!.popViewController(animated: false)



            let navigationController2 =  self.viewControllers![1] as? UINavigationController

            navigationController2!.popToRootViewController(animated: false)





            let navigationController3 =  self.viewControllers![2] as? UINavigationController

            navigationController3!.popToRootViewController(animated: false)



            let navigationController4 =  self.viewControllers![3] as? UINavigationController

            navigationController4!.popToRootViewController(animated: false)



        }

}

Use viewControllers property of UITabbarController. viewControlers is an array of UIViewController for UITabbarController. Exchange/Move position of view controllers upon tabbar(controller) selection.

Use tabbar(controller)'s delegate method to hanlde these operations, like:

Swift 3

func tabBarController(_ tabBarController: UITabBarController, didSelect viewController: UIViewController) {

    if var viewcontrollers = tabBarController.viewControllers {

        viewcontrollers.remove(at: tabBarController.selectedIndex)

        viewcontrollers.insert(viewController, at: 0)

        tabBarController.viewControllers = viewControllers

    }

}

You can also use this delegate method, if you have an access to tabbarController where you have implemented.

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

 // Write a similar code to exchange/move view controllers using tabbarController instance.       

}

This worked for me.

func tabBarController(_ tabBarController: UITabBarController, didSelect viewController: UIViewController) {

    guard let navigationController = tabBarController.viewControllers?[tabBarController.selectedIndex] as? UINavigationController else {

        return

    }



    navigationController.popToRootViewController(animated: false)

}