How to Navigate from One View Controller to Another Using Swift

How to Navigate from one View Controller to another using Swift

Create a swift file (SecondViewController.swift) for the second view controller
and in the appropriate function type this:

let secondViewController = self.storyboard.instantiateViewControllerWithIdentifier("SecondViewController") as SecondViewController
self.navigationController.pushViewController(secondViewController, animated: true)

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Swift 2+

let mapViewControllerObj = self.storyboard?.instantiateViewControllerWithIdentifier("MapViewControllerIdentifier") as? MapViewController
self.navigationController?.pushViewController(mapViewControllerObj!, animated: true)

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Swift 4

let vc = UIStoryboard.init(name: "Main", bundle: Bundle.main).instantiateViewController(withIdentifier: "IKDetailVC") as? IKDetailVC
self.navigationController?.pushViewController(vc!, animated: true)

Programmatically navigate to another view controller/scene

I already found the answer

Swift 4

let storyBoard : UIStoryboard = UIStoryboard(name: "Main", bundle:nil)
let nextViewController = storyBoard.instantiateViewController(withIdentifier: "nextView") as! NextViewController
self.present(nextViewController, animated:true, completion:nil)

Swift 3

let storyBoard : UIStoryboard = UIStoryboard(name: "Main", bundle:nil)

let nextViewController = storyBoard.instantiateViewControllerWithIdentifier("nextView") as NextViewController
self.presentViewController(nextViewController, animated:true, completion:nil)

Passing data between a ViewController to another ViewController with navigation controller Swift 5

If you are using segue, then add "segue_identifier" in storyboard and the in secondviewcontroller add:

 override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
             if segue.identifier == "segue_ identifier" {
                let mainTab = segue.destination as! tabBarController
                let nav = mainTab.viewControllers[0] as! UINavigationController
                let vc = nav.viewControllers.first as! HomeViewController
                vc.cid = cityId
            }
        }

Because your segue destination is UINavigationController, you need to send data to view controller like this

Swift programmatically navigate to another view controller/scene

Swift 5

The default modal presentation style is a card. This shows the previous view controller at the top and allows the user to swipe away the presented view controller.

To retain the old style you need to modify the view controller you will be presenting like this:

newViewController.modalPresentationStyle = .fullScreen

This is the same for both programmatically created and storyboard created controllers.

Swift 3

With a programmatically created Controller

If you want to navigate to Controller created Programmatically, then do this:

let newViewController = NewViewController()
self.navigationController?.pushViewController(newViewController, animated: true)

With a StoryBoard created Controller

If you want to navigate to Controller on StoryBoard with Identifier "newViewController", then do this:

let storyBoard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
let newViewController = storyBoard.instantiateViewController(withIdentifier: "newViewController") as! NewViewController
        self.present(newViewController, animated: true, completion: nil)

Navigating from one ViewController to a new ViewController with a different Storyboard

CottageTabsController is in its own storyboard, so you need to to change replace UIStoryboard(name: "Home", bundle: nil) with UIStoryboard(name: "CottageTabs", bundle: nil).

@IBAction func enterCottageBuddyApp(_ sender: Any) {
    let storyBoard : UIStoryboard = UIStoryboard(name: "CottageTabs", bundle:nil) /// <- Different storyboard!

    let nextViewController = storyBoard.instantiateViewController(withIdentifier: "CottageTabsView") as!
    CottageTabsController
    self.present(nextViewController, animated:true, completion:nil)
}

How to navigate from one View Controller to the other?

Typically when you are doing login you would use neither push or present. There are multiple ways of handling this, but the easiest is to embed in some parent (root) VC. Here is an example:

class ViewController: UIViewController {
    private var embeddedViewController: UIViewController! {
        didSet {
            // https://developer.apple.com/documentation/uikit/view_controllers/creating_a_custom_container_view_controller
            // Add the view controller to the container.
            addChild(embeddedViewController)
            view.addSubview(embeddedViewController.view)

            // Create and activate the constraints for the child’s view.
            embeddedViewController.view.translatesAutoresizingMaskIntoConstraints = false
            embeddedViewController.view.topAnchor.constraint(equalTo: view.topAnchor).isActive = true
            embeddedViewController.view.leadingAnchor.constraint(equalTo: view.leadingAnchor).isActive = true
            embeddedViewController.view.trailingAnchor.constraint(equalTo: view.trailingAnchor).isActive = true
            embeddedViewController.view.bottomAnchor.constraint(equalTo: view.bottomAnchor).isActive = true

            // Notify the child view controller that the move is complete.
            embeddedViewController.didMove(toParent: self)
        }
    }
    override func viewDidLoad() {
        super.viewDidLoad()
        let loginVC = LoginViewController()
        loginVC.delegate = self
        embeddedViewController = loginVC
    }
}

extension ViewController: LoginDelegate {
    func didLogin() {
        embeddedViewController = MainViewController()
    }
}

protocol LoginDelegate: AnyObject {
    func didLogin()
}

class LoginViewController: UIViewController {
    private lazy var loginButton: UIButton = {
        let button = UIButton()
        button.setTitle("Login", for: .normal)
        button.addTarget(self, action: #selector(didTapLoginButton), for: .touchUpInside)
        return button
    }()
    
    weak var delegate: LoginDelegate?
    
    override func viewDidLoad() {
        super.viewDidLoad()
        view.addSubview(loginButton)
        view.backgroundColor = .red
        
        loginButton.translatesAutoresizingMaskIntoConstraints = false
        loginButton.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
        loginButton.centerYAnchor.constraint(equalTo: view.centerYAnchor).isActive = true
    }
    
    @objc private func didTapLoginButton() {
        delegate?.didLogin()
    }
}

class MainViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        view.backgroundColor = .blue
    }
}

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