The file I'm reading is （let data = try Data(contentsOf: url) ...）
url: file:///var/mobile/Containers/Data/Application/15666F33-0EA8-4F1B-BFBA-634EEE9FC97D/Documents/Attachments/Documents/test.numbers
But an error was caught which says Permission Denied
This is a file imported using UIDocumentPicker with import mode and moved to local folder using FileManager.default.moveItem(at: url, to: newURL)
The file does exist, and UIDocumentInteractionController does open it successfully with the same url.
I guess the access control of the original file is copied by UIDocumentPicker as well. But I have no idea how to resolve this issue.
Any help would be really appreciated. Thanks in advance.