PDFSelectionSample

This is the project for Apple engineers debugging PDFKit selection

Steps to reproduce

Double click any word, a selection would be made around the word
Click the textbox at the top of the interface
Double click any word again, no selection could be found, but in the console, selection still made and printed.

PDFKit view is a wrapper of PDFView
IvyPDF View is PDFView Extension, which adds LongPress Selection and Double Tap Selection.
Double Tap is to select an word automatically on which user double taps.
panSelection is to select words on which fingers press. It’s similar to PDFKit default long press, though it ends at the exact point where users lift their fingers.
Two closures provided to log pdfview and selection in the console so when selection is not visible but could still be found what is happening.