gistfile1.txt

    NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://google.com"]];
    [self.webView loadRequest:request];
    
    bool __block inRac = false;
    [RACObserve(self, webView.scrollView.contentSize)
      subscribeNext:^(id x) {
          if (!inRac) {
              inRac = true;
              self.webView.scrollView.contentSize = CGSizeMake(self.webView.frame.size.width, self.webView.scrollView.contentSize.height);
              inRac = false;   
          }
    }];