I'm trying to display a pdf on ios via apples PDFKit library, and rather than use PDFDisplayMode.singlePageContinuous mode, I want to stop at page breaks so I'm trying to use PDFDisplayMode.singlePage. https://developer.apple.com/documentation/pdfkit/pdfdisplaymode
However, this mode seems to only display one page of the pdf which is quite useless. I've tried adding swipe handlers to the page but they aren't working either.
I've found sample applications and altered their code to test the pdfdisplaymode but get the same problem e.g. https://github.com/vipulshah2010/PDFKitDemo
How can I implement a one page at a time pdfviewer with pdfkit, that allows swiping between pages?!
A another simple way to do this is setting
pdfView.usePageViewController(true)
This adds the swiping between pages for you and no need to set up your own gestures. See example below:
override func viewDidLoad() {
super.viewDidLoad()
// Add PDFView to view controller.
let pdfView = PDFView(frame: self.view.bounds)
self.view.addSubview(pdfView)
// Configure PDFView to be one page at a time swiping horizontally
pdfView.autoScales = true
pdfView.displayMode = .singlePage
pdfView.displayDirection = .horizontal
pdfView.usePageViewController(true)
// load PDF
let webUrl: URL! = URL(string: url)
pdfView.document = PDFDocument(url: webUrl!)
}
Use the swipe gesture recognizer (UISwipeGestureRecognizer) to let the user swipe the PDF view screen (PDFView) to the left and right.
import UIKit
import PDFKit
class ViewController: UIViewController, PDFViewDelegate {
// MARK: - Variables
// MARK: - IBOutlet
@IBOutlet weak var pdfView: PDFView!
// MARK: - Life cycle
override func viewDidLoad() {
super.viewDidLoad()
let filePath = "/Users/george/Library/Developer/CoreSimulator/Devices/B5C5791C-3916-4BCB-8EB6-5D3D61C08DC0/data/Containers/Data/Application/4B644584-0025-45A7-9D71-C8F8478E4620/Documents/my PDF.pdf"
pdfView.document = getDocument(path: filePath)
pdfView.backgroundColor = .lightGray
pdfView.autoScales = true
pdfView.displayMode = .singlePageContinuous
pdfView.usePageViewController(true, withViewOptions: nil)
createMenu()
thumbnail()
/* swipe gesture */
let leftSwipeGesture = UISwipeGestureRecognizer(target: self, action: #selector(respondLeftSwipeGesture(_:)))
leftSwipeGesture.direction = [UISwipeGestureRecognizer.Direction.left]
self.view.addGestureRecognizer(leftSwipeGesture)
let rightSwipeGesture = UISwipeGestureRecognizer(target: self, action: #selector(respondRightSwipeGesture(_:)))
rightSwipeGesture.direction = [UISwipeGestureRecognizer.Direction.right]
pdfView.addGestureRecognizer(rightSwipeGesture)
}
@objc func respondLeftSwipeGesture(_ sender: UISwipeGestureRecognizer) {
if pdfView.document == nil { return }
pdfView.goToPreviousPage(self)
}
@objc func respondRightSwipeGesture(_ sender: UISwipeGestureRecognizer) {
if pdfView.document == nil { return }
pdfView.goToNextPage(self)
}
func getDocument(path: String) -> PDFDocument? {
let pdfURL = URL(fileURLWithPath: path)
let document = PDFDocument(url: pdfURL)
return document
}
}
You might simply set the displayMode to continuous and it might work:
pdfView.displayMode = .singlePageContinuous