如何在NavigationController中推送WebView

上面的代码不起作用,也有一些泄漏. -

这是修改后的版本.

UIViewController *webViewController = [[[UIViewController alloc] 
    init] autorelease];

UIWebView *uiWebView = [[[UIWebView alloc] 
    initWithFrame: CGRectMake(0,0,320,480)] autorelease];
[uiWebView loadRequest:[NSURLRequest 
    requestWithURL:[NSURL URLWithString:@"http://www.google.com"]]];

[webViewController.view addSubview: uiWebView];

[self.navigationController 
    pushViewController:webViewController animated:YES];