I was writing a simple WebView in Swift, but everytime I try to launch it in the iOS Simulator I get these errors. What is going wrong?

```
import UIKit

class ViewController: UIViewController {

@IBOutlet var webview: UIWebView

var urlpath = "http://www.google.de"

func loadAddressURL(){
    let requesturl = NSURL(string: urlpath)
    let request = NSURLRequest(URL: requesturl)
    webview.loadRequest(request)
}

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
    loadAddressURL()
}

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

}

```

Error:

```
fatal error: unexpectedly found nil while unwrapping an Optional value
(lldb)
self    uiwebview.ViewController    0x7987fc70  0x7987fc70
request NSURLRequest *  0x78ebfc40  0x78ebfc40
requesturl  NSURL * ""  0x78ec0040

```