CODEWITHSUNDEEP
iosswift2viewcontroller
Mahalakshmi.J
Mahalakshmi.J

Reputation: 189

How to change the initial view controller through swift code

I'm developing an app with initial view controller as "Navigation controller". The app contains 2 ideas to implement.

1) From the RegisterViewController, User has to register the mobile no with verification //from sms or call, After verified it enters into HomeViewController( Condition: when the user install the app for the 1st time it shows the RegisterViewController) enter image description here

2) If the app is already get installed into the iPhone and the user also register the mobile no, then the user opens the same app now the initialViewController must be the HomeViewController

enter image description here

How can I achieve this idea through swift code?

Upvotes: 2

Views: 2187

Answers (3)

Anbu.Karthik
Anbu.Karthik

Reputation: 82759

do like

  var viewController: UIViewController!


func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject : AnyObject]?) -> Bool {


self.window = UIWindow(frame: UIScreen.mainScreen().bounds)
    var storyboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)

    if NSUserDefaults.standardUserDefaults().objectForKey("notRegistered") == nil
    {
        viewController = storyboard.instantiateViewControllerWithIdentifier("RegisterViewController")
    }
    else {

        if NSUserDefaults.standardUserDefaults().objectForKey("notRegistered") as! String == "registred"
        {
             viewController = storyboard.instantiateViewControllerWithIdentifier("HomeViewController")
        }
        else
        {
            viewController = storyboard.instantiateViewControllerWithIdentifier("RegisterViewController")
        }
      // if you want to create the UINavigationController use this
        let nav = UINavigationController(rootViewController: viewController)
        self.window!.rootViewController = nav

      else directly access use this
        self.window!.rootViewController = viewController


self.window.makeKeyAndVisible()
// Override point for customization after application launch.
return true
}

on registration page after the success save like

//Save
NSUserDefaults.standardUserDefaults().setObject("registred", forKey: "notRegistered")

Upvotes: 1

Muzahid
Muzahid

Reputation: 5186

Implement this logic in your appdelegate class:

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {

        let isRegistered = NSUserDefaults.standardUserDefaults().boolForKey("ALLREADY_REGISTER")

        if isRegistered == true{
            // implement home view controller
            let homeViewController = UIStoryboard(name: "Main", bundle: nil).instantiateViewControllerWithIdentifier("HomeVC") as! HomeViewController
            self.window?.rootViewController = homeViewController
            self.window?.makeKeyAndVisible()

        }else{
            // implement register view controller
            let registerViewController = UIStoryboard(name: "Main", bundle: nil).instantiateViewControllerWithIdentifier("RegisterVC") as! RegisterViewController
            self.window?.rootViewController = registerViewController
            self.window?.makeKeyAndVisible()
        }

                return true
    }

Then when first time register completed successfully then set bool variable true for the key ALLREADY_REGISTER 

NSUserDefaults.standardUserDefaults().setBool(true, forKey: "ALLREADY_REGISTER")`

Upvotes: 2

iVarun
iVarun

Reputation: 6611

you have to change rootViewController instead of initialViewController. when user verified and enters into HomeViewController store flag in NSUserDefaults.then every time in AppDelegate didFinishLaunchingWithOptions check user is already entered in HomeViewController using NSUserDefaults.

let appdelegate = UIApplication.sharedApplication().delegate as! AppDelegate
let mainStoryboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
var homeViewController = mainStoryboard.instantiateViewControllerWithIdentifier("HomeViewController") as! HomeViewController
let nav = UINavigationController(rootViewController: homeViewController)
appdelegate.window!.rootViewController = nav

Upvotes: 0

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