How to change RootViewController programmatically?

» ios » How to change RootViewController programmatically?

By : Hasan Bardakçı

Date : November 14 2020, 04:48 PM

will help you I am developing some custom camera app, I just want to skip my login page and make my camera home page to initial root view when user already registered. I'm doing it from AppDelegate or inside the view code however I'm getting an error any one described it from scratch or any sample example. My code is below,

code :

-(void)viewWillAppear:(BOOL)animated{
    // check if user is already Logged in
    if([defaults objectForKey:@"username"]!=nil  && ![[defaults objectForKey:@"username"] isEqualToString:@""]){

        UIStoryboard* storyboard = [UIStoryboard storyboardWithName:@"Main_iPhone" bundle:nil];
        UIViewController *view = [storyboard instantiateViewControllerWithIdentifier:@"HomeScreen"];

        [self presentViewController:view animated:YES completion:nil];
    }
}

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Going to the rootViewController of another navigationController programmatically?

By : NBStudios

Date : March 29 2020, 07:55 AM

This might help you I have an iPhone app with a UITabBar, and each tab has a unique navigationController. , you can pop to root view controller as

code :

[(UINavigationController *)self.tabBarController.selectedViewController popToRootViewControllerAnimated:YES];

Programmatically change rootViewController of storyBoard

By : Leonie Schonewille

Date : March 29 2020, 07:55 AM

I hope this helps you . I have created my project using Storyboards. The root ViewController lies inside a Storyboard, I have not written a single code in the appDelegate. , Objective-C:

code :

UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];
UITabBarController *rootViewController = [storyboard instantiateViewControllerWithIdentifier:@"tabBarcontroller"];
[[UIApplication sharedApplication].keyWindow setRootViewController:rootViewController];

 let mainStoryboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
 let viewController = mainStoryboard.instantiateViewControllerWithIdentifier("tabBarcontroller") as UITabBarController  
   UIApplication.sharedApplication().keyWindow?.rootViewController = viewController;

let mainStoryboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
let viewController = mainStoryboard.instantiateViewController(withIdentifier: "tabBarcontroller") as! UITabBarController
UIApplication.shared.keyWindow?.rootViewController = viewController

Create a TabBar programmatically but not on the rootViewController

By : Dhruva Upamanyu

Date : March 29 2020, 07:55 AM

I hope this helps you . Push to UITabBarController instead of CreateElement tableViewController, when didSelect of tableview called in Element TableViewController.
From didSelectRowAt indexPath of Element TableViewController

code :

override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    let tab = TabbarController()
    self.navigationController?.pushViewController(tab, animated: true)
}

class TabbarController: UITabBarController {

    override func viewDidLoad() {
        super.viewDidLoad()

        let createElement = CreateElementTVC()      //Create Element TableViewController
        createElement.tabBarItem = UITabBarItem(tabBarSystemItem: .history, tag: 0)

        let more = MoreVC()                         //For eg. take empty UIViewController for another tab
        more.tabBarItem = UITabBarItem(tabBarSystemItem: .more, tag: 1)

        //Assign view controllers which you want to show in tab bar
        self.viewControllers = [createElement, more]. 
    }
}

How to programmatically come to rootViewController without using UINavigationController

By : user3055271

Date : December 21 2020, 03:04 PM

Hope this helps I'm using swift in iOS. I have to navigate back to my rootViewController from the current UIViewController by clicking on a button and I am not using UINavigationController. , Try this in your button action:

code :

@IBAction func buttonClicked(_ sender: UIButton) {
    self.dismiss(animated: true, completion: nil)
}

how can i change programmatically the rootViewController using Storyboards?

By : Burt Walker

Date : March 29 2020, 07:55 AM

Any of those help You can set a cookie (using NSUserDefaults for example) telling you that you need to start from a different view controller. Then in you app delegate you can check for this cookie value and change the initial view controller of your storyboard like that