How to transition to a new view controller with code only using Swift

Question

I want to transition from ViewController to secondViewController, when the user presses a UIButton, using code only in Swift.

//Function to transition
func          


        

Answer 1

This worked perfectly for me:

func switchScreen() {
    let mainStoryboard = UIStoryboard(name: "Main", bundle: Bundle.main)
    if let viewController = mainStoryboard.instantiateViewController(withIdentifier: "yourVcName") as? UIViewController {
        self.present(viewController, animated: true, completion: nil)
    }
}