В такой ситуации мы можем создать временную папку, которая может содержать тот же файл, для которого lastPathExtension будет иметь значение document.fileExtension, и мы можем передать этот новый путь к файлу UIDocumentInteractionController.init(url: newFileUrl)
Например:
func openUnsupportedFileWithPath(documentName : String, fileurl : URL, fileExtension : String, aDocument: SILDocumentDB? = nil, sourceView: UIView? = nil) -> Void {
// Create new temporary path
let paths: String = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0]
var newFileUrl: String = paths.appending("/Downloads/TemporaryFolder)")
newFileUrl = newFileUrl.appendingFormat("%@","\(documentName)")
let destinationPathUrl : URL
do {
// Move newly filePath with new fileName and fileExtension
destinationPathUrl = URL(fileURLWithPath: destinanewFileUrltionPath)
try FileManager.default.moveItem(at: fileurl, to: destinationPathUrl)
} catch {
print(error)
}
//Pass newly filePath to UIDocumentInteractionController
documentInteractionController = UIDocumentInteractionController.init(url: newFileUrl)
documentInteractionController?.name = documentName
documentInteractionController?.delegate = self
let canPreview = documentInteractionController?.presentPreview(animated: true)
if (canPreview == false) {
let activityViewController = UIActivityViewController.init(activityItems: [fileurl], applicationActivities: nil)
activityViewController.setValue(documentName, forKey: "subject")
if ISIPAD {
activityViewController.popoverPresentationController?.sourceView = sourceView ?? self.view
}
self.present(activityViewController, animated: true, completion: nil)
}
}
И UIDocumentInteractionController получает dismiss, удаляет временный filePath по методу documentInteractionControllerDidEndPreview(_ controller: UIDocumentInteractionController)
.
public func documentInteractionControllerDidEndPreview(_ controller: UIDocumentInteractionController) {
documentInteractionController = nil
let paths: String = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0]
let filePath: String = paths.appending("/Downloads/TemporaryFolder)")
let _fileManager : FileManager = FileManager.default
if filePath.length > 0 {
if _fileManager.fileExists(atPath: filePath) {
do{
try _fileManager.removeItem(atPath: filePath)
}catch let error as NSError{
print("\(error.localizedDescription)")
}
}
}
}