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swift4ios-pdfkitxcode10.3

PDFViewer SWIFT 4 Xcode 10.3

Here's my code. I have a file "dreamGirls.pdf" 

import UIKit
import PDFKit

var pdfView : PDFView!

    func createPDFViewer() {
        let path = Bundle.main.path(forResource: "dreamGirls", ofType: "pdf")
        let url = URL(fileURLWithPath: path!)
        let pdfDocument = PDFDocument(url:url)

        self.pdfView.document = pdfDocument
        self.pdfView.autoScales = true
        self.pdfView.displayMode = .singlePageContinuous
        self.pdfView.displayDirection = .vertical

        let width = self.view.frame.width
        let height = self.view.frame.height - 100
        self.pdfView.frame = CGRect(x: 0, y: 100, width: width, height: height)
        self.pdfView.backgroundColor = .red
        self.view.addSubview(self.pdfView)
    }

I also tried the following: 

func createPDFViewer() {

    let fileToShow = Bundle.main.url(forResource: "dreamGirls", withExtension: "pdf")
    let documentToShow = PDFDocument(url: fileToShow!)

    self.pdfView.document = documentToShow
    self.pdfView.autoScales = true
    self.pdfView.displayMode = .singlePageContinuous
    self.pdfView.displayDirection = .vertical

    let width = self.view.frame.width
    let height = self.view.frame.height - 100
    self.pdfView.frame = CGRect(x: 0, y: 100, width: width, height: height)
    self.pdfView.backgroundColor = .red
    self.view.addSubview(self.pdfView)
}

Error output: Fatal error: Unexpectedly found nil while implicitly unwrapping an Optional value

pdfView PDFView? nil none

I also just tried this, and got the same error:


import UIKit
import PDFKit

class ViewController: UIViewController {

    var pdfView : PDFView?

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.

        let fileToShow = Bundle.main.url(forResource: "dreamGirls", withExtension: "pdf")
        let documentToShow = PDFDocument(url: fileToShow!)

        self.pdfView!.document = documentToShow!
        self.pdfView!.autoScales = true
        self.pdfView!.displayMode = .singlePageContinuous
        self.pdfView!.displayDirection = .vertical

        let width = self.view.frame.width
        let height = self.view.frame.height - 100
        self.pdfView!.frame = CGRect(x: 0, y: 100, width: width, height: height)
        self.pdfView!.backgroundColor = .red
        self.view.addSubview(self.pdfView!)


    }


}

self pdfViewerTest.ViewController 0x00007fe538520580 UIKit.UIViewController UIViewController
pdfView PDFView? nil none fileToShow URL? "file:///Users/nacly/Library/Developer/CoreSimulator/Devices/C92B8B59-90C5-4509-A848-99D0B39A4469/data/Containers/Bundle/Application/7D0B63DF-F265-48DB-8887-D0563FD45FDA/pdfViewerTest.app/dreamGirls.pdf" some _url NSURL "file:///Users/nacly/Library/Developer/CoreSimulator/Devices/C92B8B59-90C5-4509-A848-99D0B39A4469/data/Containers/Bundle/Application/7D0B63DF-F265-48DB-8887-D0563FD45FDA/pdfViewerTest.app/dreamGirls.pdf" 0x0000600002638120 documentToShow PDFDocument? 0x00006000000301d0 ObjectiveC.NSObject NSObject
width CGFloat height CGFloat

enter image description here

I also tried the following, in case the PDFView wasn't initialized:


import UIKit
import PDFKit

class ViewController: UIViewController {

    var pdfView : PDFView?

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
        self.pdfView = PDFView()
        let fileToShow = Bundle.main.url(forResource: "dreamGirls", withExtension: "pdf")
        let documentToShow = PDFDocument(url: fileToShow!)

        self.pdfView!.document = documentToShow!
        self.pdfView!.autoScales = true
        self.pdfView!.displayMode = .singlePageContinuous
        self.pdfView!.displayDirection = .vertical

        let width = self.view.frame.width
        let height = self.view.frame.height - 100
        self.pdfView!.frame = CGRect(x: 0, y: 100, width: width, height: height)
        self.pdfView!.backgroundColor = .red
        self.view.addSubview(self.pdfView!)


    }

It returned the following error:

pdfViewerTest[16863:1994476] * Terminating app due to uncaught exception 'CALayerInvalidGeometry', reason: 'CALayer position contains NaN: [nan nan]' * First throw call stack:

Solution

  • Ok, I solved it. I had to do the call in "viewDiDAppear" instead of "viewDiDLoad" because of bad geometry.