title: block syntax for calling class method in AFNetworking2
body: <p>This is a total noob question but I'm testing out AFNetworking2 specifically, the UIWebView+AFNetworking piece. But how do I call loadRequest. I have:</p>
  
  <pre><code>    NSURL *websiteUrl = [NSURL URLWithString:@"http://www.google.com"];  //fine
      NSURLRequest *urlRequest = [NSURLRequest requestWithURL:websiteUrl];  //find
  
  
     [self.myWebView loadRequest:urlRequest progress:(void (^)(NSUInteger bytesWritten, long long totalBytesWritten, long long totalBytesExpectedToWrite))^{ // do I need second carat?
          //NSLog(@"writing bytes %i", bytesWritten);  // how to get access to bytesWritten?
          NSLog(@"writing bytes");
  
      }....
  </code></pre>
  
  <p>but I want to NSLog the bytesWritten. Block syntax always throws me for a loop. Do I need the second carat in the call?</p>
  
  <p>Here's a link to docs for the call: <a href="http://cocoadocs.org/docsets/AFNetworking/2.0.3/Categories/UIWebView+AFNetworking.html" rel="nofollow">http://cocoadocs.org/docsets/AFNetworking/2.0.3/Categories/UIWebView+AFNetworking.html</a></p>