Key/values for usePageViewController's options

Question

What key/values can I specify in withViewOptions parameter of usePageViewController method of PDFView of iOS11, PDFKit?

Answer 1

According to the documentation found in PDFKit, usePageViewController:withViewOptions: passes the given options to the UIPageViewController located in the viewer.

The viewOptions argument is given to the UIPageViewController initializer, as a way to pass in page spacing, etc.

UIPageViewController's available options are UIPageViewControllerOptionSpineLocationKey and UIPageViewControllerOptionInterPageSpacingKey.