title: How to reload WKWebView?
body: <p>Loading new content to <code>WKWebView</code> but content does not appear, old content remains. Any idea why?</p>
  
  <pre><code>WKWebViewConfiguration *c = [WKWebViewConfiguration new];
  pdfView = [[WKWebView alloc] initWithFrame:CGRectZero configuration:c];
  pdfView.UIDelegate = self;
  pdfView.navigationDelegate = self;
  pdfView.scrollView.delegate = self;
  [cell.contentView addSubview:pdfView];
  [pdfView loadFileURL:[NSURL fileURLWithPath:filePath] allowingReadAccessToURL:[NSURL fileURLWithPath:filePath]];
  [pdfView loadFileURL:[NSURL fileURLWithPath:filePathNEW] allowingReadAccessToURL:[NSURL fileURLWithPath:filePathNEW]];
  </code></pre>
  
  <p>Tried <code>reload()</code> does not work. Only recreating the whole <code>WKWebView</code>. But it does not efficient regarding memory usage.</p>