How to safely shut down a loading UIWebView in viewWillDisappear?

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A variation on this should fix both the leaking and zombie issues:

- (void)loadRequest:(NSURLRequest *)request
{
    [self retain];
    if ([webView isLoading])
        [webView stopLoading];
    [webView loadRequest:request];
    [self release];
}
- (void)webViewDidStartLoad:(UIWebView *)webView
{
    [self retain];
}
- (void)webViewDidFinishLoad:(UIWebView *)webView
{
    [self release];
}
- (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error
{
    [self release];
}

- (void)viewWillDisappear
{
    if ([webView isLoading])
        [webView stopLoading];
}

- (void)dealloc
{
    [webView setDelegate:nil];
    [webView release];
    [super dealloc];
}

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