pushviewcontroller swift autolayout
//call in ViewdidLoad or in Button as
button.addTarget(self, action: #selector(backButtonAction), for: .touchUpInside)
button.addTarget(self, action: #selector(nextButtonAction), for: .touchUpInside)
//Next button Action
@objc func nextButtonAction(){
let vc2 = SecondViewController()
self.navigationController?.pushViewController(vc2, animated: true)
}
//back button action
@objc func backButtonAction(){
self.navigationController?.popViewController(animated: true)
}
//if you are not using Storyboard
//also Verify in SceneDelegate
var window: UIWindow?//verify
func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
guard let windowScene = (scene as? UIWindowScene) else { return }
let navController = UINavigationController(rootViewController: FirstViewController())
navController.setNavigationBarHidden(true, animated: true)
window = UIWindow(frame: windowScene.coordinateSpace.bounds)
window?.makeKeyAndVisible()
window?.windowScene = windowScene
window?.rootViewController = navController
}