IPHONE APP FIX

I am currently having this issue with IOS app. When I click on a URL button the UIWebView loads the correct URL in first instance however when I visit another page within same Web View Frame it stores that page to its memory. When I navigate to another button and click back to previous button it shows the page that I was previously in instead of loading the URL. What I want to achieve is when user clicks on button the UIWebView loads the URL . My current code: import UIKit class MenuViewController: UIViewController { @IBOutlet weak var oyebWebView: UIWebView! override func viewDidLoad() { [login to view URL]() [login to view URL](NSURLRequest(URL: NSURL(string: MenuUrl)!)) // Do any additional setup after loading the view. } override func didReceiveMemoryWarning() { [login to view URL]() // Dispose of any resources that can be recreated. }