title: PDFKit - PDFThumbnailView skips a page instead of showing continuous pages - swift
body: <p>I am able to present the PDFThumnailView of my pdf document.  The problem is it is skipping pages.  It shows pages 1,3,5 etc...and not displaying the pages in between.  My code is below.</p>
  
  <pre><code>@IBOutlet weak var pdfView: PDFView!
  @IBOutlet weak var pdfThumbnailView: PDFThumbnailView!
  
   func setupThumbnailView() {
      pdfThumbnailView.pdfView = pdfView
      pdfThumbnailView.thumbnailSize = CGSize.init(width: thumbnailDimension, height: thumbnailDimension)
      pdfThumbnailView.backgroundColor = sidebarBackgroundColor
  
  }
  </code></pre>