Front view always create new ViewController not use previous View Controller

[dekphoenix]

assume as

• SUB MENU 1 is FirstViewController
• SUB MENU 2 is SecondViewController

when I tap SUB MENU 2, FirstViewController will deinit and when I tab SUB MENU 1 back, SecondViewController will deinit and FristViewController will create new.

My question is How to use old ViewController such as when I tap SUB MENU 2 and back to SUB MENU 1, FirstViewController will show old data or previous state

[iDevelopper]

Just by keeping their reference in some properties.

[dekphoenix]

How to keeping it My code is here `override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {

    let index = indexPath.row
    switch index {
    case 1:
        if let controller = self.storyboard?.instantiateViewController(withIdentifier: "Nav1") as? FirstNav{
            revealViewController().pushFrontViewController(controller, animated:true)
            if let vc = controller.viewControllers.first as? FirstViewController{
                vc.txtTitle = "Hello My Second Time"
                
            }
        }
        break
    case 2:
        if let controller = self.storyboard?.instantiateViewController(withIdentifier: "Nav2") as? SecondNav{
            revealViewController().pushFrontViewController(controller, animated:true)
        }
        
        break
    default:
        break
    }
}`

[iDevelopper]

Could you upload a sample project, I will modify it...

[dekphoenix]

Here is my example Sidebar.zip

[iDevelopper]

Hi, here is the modified example:

Sidebar.zip

[dekphoenix]

@iDevelopper ok It works perfectly, thank you 👍

[Adalex3]

This does not seem to work for me. Going through the code, everything seems as it should be, but it still recreates a new view controller every time you select an option, which is very bad, and possibly fatal for my specific app. Here is my TableViewController (or as I call it MenuController) code:

class MenuController: UITableViewController {

var firstController: HomeNav?
var secondController: SettingsNav?

override func viewDidLoad() {
    super.viewDidLoad()

    self.navigationController?.navigationBar.bounds.size.width = 275

}

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

override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    let index = indexPath.row
    print(index)
    switch index {
    case 1:
        
        if self.firstController != nil {
            revealViewController().pushFrontViewController(self.firstController, animated:true)
        }
        else if let controller = self.storyboard?.instantiateViewController(withIdentifier: "homeNav") as? HomeNav{
            revealViewController().pushFrontViewController(controller, animated:true)
        }
        
        break
    case 7: //This is the row of the label for the view controller
        
        if self.secondController != nil {
            revealViewController().pushFrontViewController(self.secondController, animated:true)
        }
        else if let controller = self.storyboard?.instantiateViewController(withIdentifier: "settingsNav") as? SettingsNav {
            self.secondController = controller
            revealViewController().pushFrontViewController(controller, animated:true)
        }
        
        break

    default:
        break
    }
}

Here is the code for HomeNav (my first view controller):

class HomeNav: UINavigationController {

override func viewDidLoad() {
    super.viewDidLoad()
    
    // Do any additional setup after loading the view.
    let menuController = self.revealViewController().rearViewController as? MenuController
    menuController?.firstController = self
}

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

Here is the code for SettingsNav (my second view controller):

class SettingsNav: UINavigationController {

override func viewDidLoad() {
    super.viewDidLoad()
    let menuController = self.revealViewController().rearViewController as? MenuController
    menuController?.secondController = self
    // Do any additional setup after loading the view.
}

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

In case you should need it, I need to say that I cannot post my entire project for fear of thievery; however, I can post little bits of code here and there if needed, as well as interface builder screenshots. Thank you for your time.

[iDevelopper]

Your firstController and secondController are surely nil.

If I understand it seems that your menuController is embedded in a navigation controller, then:

class HomeNav: UINavigationController {

    override func viewDidLoad() {
        super.viewDidLoad()
        
        // Do any additional setup after loading the view.
        let navigationController = self.revealViewController().rearViewController as? UINavigationController
        let menuController = navigationController?.topViewController as? MenuController
        menuController?.firstController = self
    }
}

Same for SettingsNav.

Hop it helps!

[Adalex3]

This worked! Thank you so much! I completely forgot to mention that my MenuController was embedded in its own NavigationController.