Swift 3 - loading multiple ViewControllers at launch

Question

I am working on making a tabbed app. It has a TabBarController and 4 ViewControllers attached to it.

By default, at launch only FirstViewController is loade

Answer 1

Add in your main view controller

var secondViewController:UIViewController!

And in your viewDidLoad:

secondViewController: UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "yourIdentifier") as! SecondViewController

That's it. When you want to present it, use:

self.present(secondViewController, animated: true, completion: nil)