Prevent screen change when I press tab which is already selected

Question

I have a CustomTabBarController with 4 tabs. When I am inside the 3rd tab, let's say I have a screen called A and I have a button which takes me a second screen called B. So, when I am on screen B and I am pressing the 3rd tab, I want to stay on screen B. The current app behaviour is when I am on screen B and I am pressing the 3rd tab, the app navigates to screen A.

Do you know how to solve this issue?

Post relevant code (as text). What you describe is not standard functionality of a tab bar controller. — HangarRash, Jun 08 '23 at 15:19

score 1 · Accepted Answer · answered Jun 08 '23 at 14:20

In your CustomTabBarController subclass inherit the UITabBarControllerDelegate protocol and in your viewDidLoad() set your controller's delegate to self. Then override the func tabBarController(_ tabBarController: UITabBarController, shouldSelect viewController: UIViewController) -> Bool method returning false if the current selectedViewController equals the passed in view controller.

class CustomTabBarController: UITabBarController, UITabBarControllerDelegate {

    override func viewDidLoad() {
        super.viewDidLoad()
        
        self.delegate = self
    }
    
    func tabBarController(_ tabBarController: UITabBarController, shouldSelect viewController: UIViewController) -> Bool {
        if selectedViewController == viewController {
            return false
        }
        return true
    }
    
}

Prevent screen change when I press tab which is already selected

1 Answers1