Can Somebody Help me? (Im a total noob in Programming btw. ^^) Xcode : So im trying to build an app for School but I keep getting Error messages... It's probably a rly obvious mistake I made ^^ 
So basically I am trying to build a View that displays a UIWebView and changes to a 2nd View if a Segment Controller Switch is pressed...
My Code is: 

import UIKit

class ViewController: UIViewController {

    @IBOutlet weak var myWebView: UIWebView!
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        
        let url = URL(string: "http://google.de")
        myWebView.loadRequest(URLRequest(url: url!))
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    @IBAction func Heute(_ sender: UISegmentedControl) {
     performSegue(withIdentifier: "Switch", sender: self)
    }
    
    //Vertretung2
    class Vertretung2: UIViewController {
        
        
        @IBOutlet weak var UIWebView1: UIWebView!
        override func viewDidLoad() {
            super.viewDidLoad()
            // Do any additional setup after loading the view, typically from a nib.
            
            let url = URL(string: "http://google.de")
             UIWebView1.loadRequest(URLRequest(url: url!))
        }
        
        
        override func didReceiveMemoryWarning() {
            super.didReceiveMemoryWarning()
            // Dispose of any resources that can be recreated.
        }
        
         @IBAction func Morgen(_ sender: UISegmentedControl) {
         performSegue(withIdentifier: "Switch", sender: self)
         }
        

    
    

}
}

My App keeps Crashing when I switch from 1st View to 2nd View.
Thx 4 helping ^^