How to get the 'current' navigation controller from tab bar controller

user_683898 0
Viewed 31433

Is there is a method to retrieve tab bar controller's current visible navigation controller?

For example, I have 2 tabbars in my program (one navigation controller each) as below

- (BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)url 
{   
   //Method is called when user clicks on a hyperlink in one of view controllers
    NSDictionary *dict = [self parseQueryString:[url query]];
    NSString *userID = [dict objectForKey:@"id"];
    NSString *navconTitle = [dict objectForKey:@"navcon"];


    //intention is to push a view controller onto the CURRENT navigation stack
    [navcon pushViewController:someViewController animated:YES];

    }
}

return YES;
}

Can anyone advise me how I can determine the current navigation controller so that I can push more viewcontrollers onto it?

uinavigationcontroller uitabbarcontroller objective-c ios
4 Answers

Updating Starsky's Swift answer to iOS 13 ("'keyWindow' was deprecated in iOS 13.0")

guard let tabBarVC = UIApplication.shared.windows.filter({$0.isKeyWindow}).first?.rootViewController as? UITabBarController else { return }
    if let currentNavController = tabBarVC.selectedViewController as? UINavigationController {
...
}
user_66922240

A Swift version, in case someone can't read Objective-C, with an additional solution for how to find the tabBar from anywhere. I use this to push to a screen when processing a notification.

guard let tabBarVC = UIApplication.shared.keyWindow?.rootViewController as? UITabBarController else { return }

if let currentNavController = tabBarVC.selectedViewController as? UINavigationController {
    currentNavController.pushViewController(someVC, animated: true)
}
user_83143940
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