How to setUp the first or Initial ViewController after a splashscreen - swift3

Question

I have this scenario:
1) When app starts, the app show the SplashScreen.
2) I need this splashScreen to run a simple logic
I am confused with the following:
Problem:
How to make SplashScreen with logic?
I add a new CocoaTouch file and call it SplashVC.swift
and assign it to the UIViewController in the LaunchScreen.storyboard.
**at LaunchScreen.storyboard:**
I see there is an arrow on the left of the ViewController.
This means it is the first VC to be loaded.
**at Main.storyboard**
I have a MainVC which I made it as the first Page to be loaded.
There are two VC which are the First Page to be loaded.
So, how do I do the the following tasks for LuanchScreen for the below :
conditions:
if there is a value in UserDefaults, go to VC1
if there is no value in UserDefaults, got to VC2
|- viewLogin
SplashScreen.swift ----|
|- viewMain
Update
1) Delete the Default LaunchScreen called: LaunchScreen.storyboard
1.1 ) add interface file in the project
in file dialogBox: select the user interface file of type : Launch Screen
name it : splash (it will create splash.storyboard)
2) Add a CocoaTouch File and Call it SplashVC.swift
3) Assign this SplashVC.swift to UIViewController in Splash.Storyboard
4) Click this UIViewController and goto File Inspector
at Interface Builder Document
untick :Use as LaunchScreen
5) click the project and goto General
Goto App Icons and Launch Images section <br/>
Launch screen file : Splash.storyboard<br/>
6) I have the viewControllers I want to navigate to base on Condition in splashVC.swift:
viewLogin.swift
viewMain.swift
7) Add code in SplashVC.swift
func checkLogin()
{
var mainView: UIStoryboard!
mainView = UIStoryboard(name: "MainStoryboard", bundle: nil)
var viewcontroller : UIViewController
if UserDefaults.standard().bool(forKey: "login"){
viewcontroller = mainView.instantiateViewController(withIdentifier: "viewLogin") as! viewLogin
}else {
viewcontroller = mainView.instantiateViewController(withIdentifier: "viewMain") as! viewMain
}
//--- error : value of type SplashVC has no member 'window'
self.window!.rootViewController = viewcontroller
self.window?.makeKeyAndVisible();
}
}
Error :
//--- error : value of type SplashVC has no member 'window'
self.window!.rootViewController = viewcontroller
self.window?.makeKeyAndVisible();
Please help. Thanks
Thanks

Answer 1

it is very simple just remove the launch screen story board and add your own.
just follow the
step:1 add your own storyboard with single view controller and assign
it to your own splashvc class.
step:2 make your splash storyboard as main interface
now you can do any coding in splash like
class SplashVC: UIViewController {
override func viewDidLoad(){
super.viewDidLoad();
checkLogin()
}
override func viewWillAppear(_ animated: Bool)
{
super.viewWillAppear(animated)
}
func checkLogin()
{
var mainView: UIStoryboard!
mainView = UIStoryboard(name: "MainStoryboard", bundle: nil)
var viewcontroller : UIViewController;
if UserDefaults.standard().bool(forKey: "login"){
viewcontroller = mainView.instantiateInitialViewController()!;
}else {
viewcontroller = mainView.instantiateViewController(withIdentifier: "yourSecondVcIde") as! YourSecondVC
}
self.window!.rootViewController = viewcontroller
self.window?.makeKeyAndVisible();
}
}