Send UIWebView title to UINavigationBar

to retrieve the title page into an UIWebView you can use it:

myNavigationBar.title = [myWebView stringByEvaluatingJavaScriptFromString:@"document.title"];

If you want to go back you can do that:

if ([myWebView canGoBack]){
    [myWebView goBack];
}

To know if the user has loaded a new page you must set the UIWebViewDelegate. For more information see the UIWebView Class Reference and the UIWebViewDelegate Protocol Reference