This is the sample code for the NavigationContoroller.
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import UIKit
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
var navigationController: UINavigationController?
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
self.window = UIWindow(frame: UIScreen.main.bounds)
self.window!.makeKeyAndVisible()
let firstViewController: FirstSwitchNavigationViewController? = FirstSwitchNavigationViewController()
navigationController = UINavigationController(rootViewController: firstViewController!)
window!.rootViewController = navigationController
return true
}
func applicationWillResignActive(_ application: UIApplication) {
}
func applicationDidEnterBackground(_ application: UIApplication) {
}
func applicationWillEnterForeground(_ application: UIApplication) {
}
func applicationDidBecomeActive(_ application: UIApplication) {
}
func applicationWillTerminate(_ application: UIApplication) {
}
}
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import UIKit
class FirstSwitchNavigationViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
title = "FirstView"
view.backgroundColor = UIColor.red
let width = view.frame.width
let height = view.frame.height
let transitionBtn = UIButton()
transitionBtn.frame.size = CGSize(width: width * 0.6, height: height * 0.2)
transitionBtn.center = view.center
transitionBtn.backgroundColor = UIColor.blue
transitionBtn.setTitle("Switch to SecondVC", for: UIControl.State.normal)
transitionBtn.addTarget(self, action: #selector(goSevondVC(sender:)), for:.touchUpInside)
view.addSubview(transitionBtn)
}
@objc internal func goSevondVC(sender: UIButton){
let secondVC = SecondSwitchNavigationViewController()
navigationController?.setViewControllers([secondVC], animated: true)
}
}
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import UIKit
class SecondSwitchNavigationViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
title = "SecondView"
view.backgroundColor = UIColor.blue
let width = view.frame.width
let height = view.frame.height
let transitionBtn = UIButton()
transitionBtn.frame.size = CGSize(width: width * 0.6, height: height * 0.2)
transitionBtn.center = view.center
transitionBtn.backgroundColor = UIColor.green
transitionBtn.setTitle("Switch to FirstVC", for: UIControl.State.normal)
transitionBtn.setTitleColor(UIColor.black, for: UIControl.State.normal)
transitionBtn.addTarget(self, action: #selector(backToFirstVC(sender:)), for:.touchUpInside)
view.addSubview(transitionBtn)
}
@objc internal func backToFirstVC(sender: UIButton){
let firstVC = FirstSwitchNavigationViewController()
navigationController?.setViewControllers([firstVC], animated: true)
}
}
