class ViewController: UIViewController {
let quickLookController = QLPreviewController()
override func viewDidLoad() {
super.viewDidLoad()
quickLookController.dataSource = self
quickLookController.delegate = self
}
@IBAction func buttonAction(_ sender: Any) {
present(quickLookController, animated: true, completion: nil)
quickLookController.reloadData()
quickLookController.refreshCurrentPreviewItem()
}
}
extension ViewController: QLPreviewControllerDataSource,QLPreviewControllerDelegate {
func numberOfPreviewItems(in controller: QLPreviewController) -> Int {
return 1
}
func previewController(_ controller: QLPreviewController, previewItemAt index: Int) -> QLPreviewItem {
let path = Bundle.main.path(forResource: "AppCoda-Ppt.ppt", ofType: nil)
let url = NSURL(fileURLWithPath: path!)
return url
}
}
This is a bug in iOS 11.2. Please file it at bugreport.apple.com if you want to be kept up to date on its status. A workaround is not to store your ppt file in your app bundle. Use a different location somewhere in your container, such as your Application Support directory.