I created a new view controller in storyboard. Connected it to the ListViewController. The ListViewController fills in the correct data to aboutDict[String:Any]. The fileURLs[] is built and func numberOfPreviewItems(in: QLPreviewController) -> Int is called - the debugger shows the fileURLs[] is as expected:
Printing description of self.fileURLs: ▿ 1 element - 0 : file:///Users/kent/Library/Developer/CoreSimulator/Devices/5E23825C-DF99-455A-BEB1-F73398E7759F/data/Containers/Bundle/Application/307ED7DF-C07C-4C0A-BA78-938BABE7C22C/WINSystemInfo.app/ID-51A_E_PLUS2.pdf`
But func previewController(_ controller: QLPreviewController, previewItemAt index: Int) -> QLPreviewItem and func previewController(_ controller: QLPreviewController, shouldOpen url: URL, for item: QLPreviewItem) -> Bool are not called.
I get a nice ViewController that was pushed into the navigation stack with the correct name for the back button, and a gray page with centered text "No file to preview".
On pressing 'back' button, func previewControllerWillDismiss(_ controller: QLPreviewController) is called. So some of the delegate and datasource functions are being called.
I must be missing something simple...
I attached my class FileViewController.swift below:
class FileViewController: QLPreviewController, QLPreviewControllerDelegate, QLPreviewControllerDataSource {
var aboutDict = [String: Any]()
// QuickLook data
var fileURLs = [QLPreviewItem]()
// MARK: - Lifecycle
override func viewDidLoad() {
super.viewDidLoad()
let filename = aboutDict["filename"] as! String?
let filetype = aboutDict["filetype"] as! String?
title = aboutDict["title"] as! String?
dataSource = self
delegate = self
if let fileUrl = Bundle.main.url(forResource: filename, withExtension: filetype, subdirectory: nil, localization: nil)
{
let filePreview = fileUrl as QLPreviewItem
fileURLs.append(filePreview)
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// MARK: - Preview controller datasource functions
func numberOfPreviewItems(in: QLPreviewController) -> Int {
return fileURLs.count
}
func previewController(_ controller: QLPreviewController, previewItemAt index: Int) -> QLPreviewItem {
return fileURLs[index]
}
// MARK: - Preview controller delegate functions
func previewControllerWillDismiss(_ controller: QLPreviewController) {
debug("previewControllerWillDismiss")
}
func previewController(_ controller: QLPreviewController, shouldOpen url: URL, for item: QLPreviewItem) -> Bool {
return true
}
}
What am I missing?
Thank you.
