Hide Navigation Bar after dismiss controller

Question

hello I have ControllerA in which I am hiding a NavigationBar. On the ControllerB I am showing the NavigationBar. On the ControllerB I have implemented a searchBar with TableView. So when user selects any row I am dismissing the controller. Problem is It shows navigationBar on controllerA.

This is how I am first hiding the NavigationBar in ControllerA

ControllerA

override func viewWillAppear(animated: Bool) {
        super.viewWillAppear(animated);

     self.navigationController?.setNavigationBarHidden(true, animated: true)

}

ControllerB here I am showing it

 override func viewWillAppear(animated: Bool) {
            super.viewWillAppear(animated);
            self.navigationController?.setNavigationBarHidden(false, animated: true)
        }

override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {

 self.navigationController!.popViewControllerAnimated(true)

}

What I have tried is I try to put hidden navigation Code in viewWillDisappear function in ControllerB but it doesn't work. It hides the bar in some delay after showing it. I also tried to put in the viewDidLoad function of ControllerA, But still it shows the bar

Please tell me how can I hide the navigationBar on ControllerA after ControllerB get dismissed

Answer 1

you can use notification post a notification on controllerB in view will Diss Appear and recive it in ControllerA .and at ControllerA in the selector method of notification write code to hide navigationbar .

write this code in view will disappear in controllerB-

NSNotificationCenter.defaultCenter().postNotificationName("NotificationIdentifierForHideNavigationBar", object: nil)

write this code in controller

 NSNotificationCenter.defaultCenter().addObserver(self, selector: "methodOfReceivedNotificationHideBar:", name:"NotificationIdentifierForHideNavigationBar", object: nil)

Use these method:-

   func methodOfReceivedNotificationHideBar(notification: NSNotification){
        self.navigationController?.setNavigationBarHidden(true, animated: true)     
  }

try this as written

Answer 2

In the first view controller viewWillAppear(), add this:

override func viewWillAppear(animated: Bool) {

 self.navigationController?.navigationBarHidden = true
 }

In the second one, add this:

 override func viewWillAppear(animated: Bool) {

      self.navigationController?.navigationBarHidden = false
 }




override func viewDidDisappear(animated: Bool) {

     self.navigationController?.navigationBarHidden = true
}

Answer 3

Add the below code in ControllerA

Code:

override func viewWillAppear(animated: Bool) {
     self.navigationController?.setNavigationBarHidden(true, animated: true)
    self.view.layoutIfNeeded()
}
override func viewWillDisappear(animated: Bool) {
    self.navigationController?.setNavigationBarHidden(false, animated: true)
    self.view.layoutIfNeeded()
}

It is working fine for me... Try it ...!!!

Answer 4

Its so simple
In first view controller viewWillAppear() add code

override func viewWillAppear(animated: Bool) {
     self.navigationController?.setNavigationBarHidden(true, animated: true);
}

In second view controller add following code

override func viewWillAppear(animated: Bool) {
    self.navigationController?.setNavigationBarHidden(false, animated: true);
}

override func viewDidDisappear(animated: Bool) {
    self.navigationController?.setNavigationBarHidden(true, animated: true);
}

OutPut Result: FirstViewcontroller without navigation bar

Second view controller with navigation bar

Answer 5

Is this entiere code? Beacues I use those two ViewControllers

ViewControllerA

class ViewControllerA: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    override func viewWillAppear(animated: Bool) {
        super.viewWillAppear(animated)
        self.navigationController?.setNavigationBarHidden(true, animated: true)
    }
}

TableViewControllerA

class TableViewControllerA: UITableViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
    }

    override func viewWillAppear(animated: Bool) {
        super.viewWillAppear(animated)
        self.navigationController?.setNavigationBarHidden(false, animated: true)
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }

    // MARK: - Table view data source

    override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
        return 1
    }

    override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return 10
    }


    override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath)

        cell.textLabel?.text = "test"

        return cell
    }


    override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
        self.navigationController?.popViewControllerAnimated(true)
    }
}

This is how it look like. YT