AFNetworking 3.0 migration for redirect block
<p>How can I update this deprecated function to use AFNetworking 3.0?</p>

<pre><code>AFHTTPRequestOperation *requestOperation=[[AFHTTPRequestOperation alloc] initWithRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:_URLString]]];
    [requestOperation setRedirectResponseBlock:^NSURLRequest *(NSURLConnection *connection, NSURLRequest *request, NSURLResponse *redirectResponse) {
        if (redirectResponse) {
            //this is the redirected url
            NSLog(@"%@",request.URL);
        }
        return request;
    }];
    [requestOperation start];
</code></pre>