CODEWITHSUNDEEP
iosswiftuiviewcontrolleruinavigationcontrolleruitabbar
Vivek
Vivek

Reputation: 100

How to check whether a specific UiViewcontroller(Tabbar Embedded) is in the navigationController rack?

I have a SignInVc as a starting point and a skip button. If user taps skip, e goes to home page and when he taps any button he is pushed to SignInVc.

The homeVC has TabBar, like its one of the 4 tab bar Vc's.

                   if let viewControllers = self.navigationController?.viewControllers {
                        for controller in viewControllers
                        {
                            if controller == (tabBarController?.viewControllers![0]){
                                print("FOUND IT")
                            }
                            print(controller)
                        }
                    }

While debugging with breakpoints, i can see the home page in navigationController?.viewControllers

But i cannot access it!!, the print is not executed. What should i use in the RHS of == ?

The plan is to push to the homeVC instead of print code.

EDIT:

I'm adding the screen shots of the debug below

Here i want to get to the view controller at Index 2

tabbar StoryBoard

Home StoryBoard

[Debug window][1]

Debug

Upvotes: 0

Views: 1342

Answers (2)

AzeTech
AzeTech

Reputation: 707

I am not sure whether am right,

logically declare a global variable,

var initiateHomePage: Bool? // declare above or outside any swift file

For button actions

case 1

  @IBAction func skipButtonTapped(_ sender: Any) {
      initiateHomePage = true // should go homepage
    
    }

case 2

  @IBAction func anyButtonTapped(_ sender: Any) {
      initiateHomePage = false // should go SignInVC
    
    }

Atlast

while executing

  if initiateHomePage == true {
      // redirect to home page
      // use this to redirect to tab bar 
       if let viewControllers = self.navigationController?.viewControllers {
                            for controller in viewControllers
                            {
                                if controller == (tabBarController?.viewControllers![0]){
                                    print("FOUND IT")
                                }
                                print(controller)
                            }
                        } 

    //  or use this 
    let ViewController:UIStoryboard = UIStoryboard(name: "Module", bundle: nil)
        let tabBarController = ViewController.instantiateViewController(withIdentifier: "tabBar") as! UITabBarController
        let appDelegate = UIApplication.shared.delegate as! AppDelegate
        appDelegate.window?.rootViewController = tabBarController
     
    } else {
      // redirect to SignINVC 
     
    }

Upvotes: 1

Andrew Romanov
Andrew Romanov

Reputation: 5076

I do not think that you have such hierarchy as you've described. Really you have

NavigationController -> TabBarController -> HomeViewController or
TabBarController -> NavigationController -> HomeViewController

Properties .navigationController and .tabBarController find nearest accessible Navigation and TabBar controller.
Just exam your hierarchy in storyboard or in code, and you will fix your problem.

UPD.
Based on your screen, you should find tabBar controller first, and find HomeViewController in tabBarController. I think, the code should looks like:

if let tabBar = navController.viewControllers.first(where: { $0 is UITabBarController} ){
    let homeController = tabController.viewControllers?.first(where: { $0 is HomeViewController})
    print("Home controller: \(home)")
}

Upvotes: 2

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