I have a Swift macOS application, and I'm trying to allow the user to open a file using NSOpenPanel and then rename that file to another name.
I have enabled sandboxing with User Selected File set to Read/Write.
Here is my code:
let panel = NSOpenPanel()
panel.canChooseFiles = true
panel.canChooseDirectories = false
panel.allowsMultipleSelection = false
if panel.runModal() == .OK {
let url = panel.url!
do {
try FileManager.default.moveItem(at: url, to: url.deletingLastPathComponent().appendingPathComponent("New name.test"))
}
catch let x {
print(x)
}
}
It simply asks the user to choose a file, and then renames the file to "New name.test". However, I get an error message saying
Error Domain=NSCocoaErrorDomain Code=513 "“Untitled” couldn’t be moved because you don’t have permission to access “untitled folder 30”." UserInfo={NSSourceFilePathErrorKey=/Users/user/Desktop/untitled folder 30/Untitled.txt, NSUserStringVariant=(
Move
), NSDestinationFilePath=/Users/user/Desktop/untitled folder 30/New name.test, NSFilePath=/Users/user/Desktop/untitled folder 30/Untitled.txt, NSUnderlyingError=0x6000032115c0 {Error Domain=NSPOSIXErrorDomain Code=1 "Operation not permitted"}}
I'm pretty sure this is because even though I have access to that specific file, I do not have access to its parent directory which is what I need in order to rename the file.
This question is very similar to Application Sandbox: renaming a file doesn't work, however none of the answers work for me.
The most promising answer is here, and I tried adding the document types & using NSFileCoordinator, but it still didn't work, with this error:
an error was received from pboxd instead of a token. Domain: NSPOSIXErrorDomain, code: 1
Is this even possible, or am I missing something obvious?
Related
I am trying to programmatically create an ePub file. I am following this tutorial. The tutorial says to "make the .epub container that all these files go in" by:
Create an empty .zip file with whatever name you like (See notes below for detailed instructions on how to do this.)
Copy the mimetype file into the zip file (don't use compression on this file)
Copy the rest of the files and folders mentioned above into the zip file *
Re-name the .zip extension to .epub
These are the last few steps of the process. I have all the files that need to go into the zip ready. I know the files work because I used a third party program (eCanCrusherMac.1.2.1) to do these finals steps and the product it creates is an ePub file that loads in the Books eReader (made by Apple).
I used the below code to zip the desired directory. I found this code on here Stack Overflow
func zip(itemAtURL itemURL: URL, in destinationFolderURL: URL, zipName: String) throws {
var error: NSError?
var internalError: NSError?
NSFileCoordinator().coordinate(readingItemAt: itemURL, options: [.forUploading], error: &error) { (zipUrl) in
// zipUrl points to the zip file created by the coordinator
// zipUrl is valid only until the end of this block, so we move the file to a temporary folder
let finalUrl = destinationFolderURL.appendingPathComponent(zipName)
do {
try FileManager.default.moveItem(at: zipUrl, to: finalUrl)
} catch let localError {
internalError = localError as NSError
}
}
if let error = error {
throw error
}
if let internalError = internalError {
throw internalError
}
}
I took the file this function gives me, made sure it had the epub extension and tried to open it using the Books app but it fails to load. The code produces a zip file that I can interact with normally in Finder so I know the function works.
I believe the issue is with the "mimetype" file getting compressed. I have taken a valid ePub, changed the file's extension to zip, unzipped it and then rezipped it using Finder and tried to open it again with no other changes and it doesn't work. As you can see in the instructions from the tutorial at the top of this post the "mimetype" file can't be compressed.
This is a Swift app on Mac.
I looked into the different NSFileCoordinator.ReadingOptions and NSFileCoordinator.WritingOptions and searched on Stack Overflow and elsewhere online but I can't find anything on how to create a zip file in Swift without compressing a file contained in the zip file.
I was able to get the ePub to open using ZIPFoundation:
try FileManager.default.zipItem(
at: bookURL,
to: ePubURL,
shouldKeepParent: false,
compressionMethod: .none,
progress: nil
)
So, I'm building a simple diary app in which the diary pages are saved in Core Data and synced with CloudKit. I have a lot of database operations, which I do asynchronously in the background. For example, when the user writes an entry, I save the diary page every 5 seconds or when the user adds an image to it.
I do not touch anything with CloudKit rather than using an NSPersistentCloudKitContainerand these lines:
cloudKitContainer.automaticallyMergesChangesFromParent = true
guard let containerId = cloudKitContainer.containerIdentifier,
let description = container.persistentStoreDescriptions.first else {
print(#function, "Could not initalizeCloudKitScheme.")
return
}
let options = NSPersistentCloudKitContainerOptions(containerIdentifier: containerId)
description.cloudKitContainerOptions = options
When saving and deleting diary pages I get the following error. The error occurs especially when adding and deleting images, I guess due to their size:
PFCloudKitExporter exportOperationFinished:withSavedRecords:deletedRecordIDs:operationError:]_block_invoke(492): Failed to delete asset file: file:///var/mobile/Containers/Data/Application/D62B434E-A968-423B-8408-9461A97DA8D1/Library/Application%20Support/ckAssetFiles/3F783A57-2038-45E8-8D93-1DD0A7EBD89F.fxd
Error Domain=NSCocoaErrorDomain Code=4 "“3F783A57-2038-45E8-8D93-1DD0A7EBD89F.fxd” couldn’t be removed." UserInfo={NSUserStringVariant=(
Remove
), NSFilePath=/var/mobile/Containers/Data/Application/D62B434E-A968-423B-8408-9461A97DA8D1/Library/Application Support/ckAssetFiles/3F783A57-2038-45E8-8D93-1DD0A7EBD89F.fxd, NSUnderlyingError=0x281995e90 {Error Domain=NSPOSIXErrorDomain Code=2 "No such file or directory"}}
Can anyone explain how this error can occur, if I am only doing basic operations on my dataset?
I am not very familiar with Swift programming but I need to write a small tool in Swift which can unzip a file (and then launch a program). I need to unzip a file which is not contained in my app bundle. It is located in /Users/me/folder1/folder2/openjdk-11.0.2.zip
I tried the libraries "Zip", "ZipFoundation", and "SSZipArchive". From what I read so far, I think that the libraries which I tried need the zip file to be located in the app bundle but I am not sure.
With "Zip" I tried:
_ = try Zip.quickUnzipFile(URL(string: openjdkZipUrl!.relativePath)!)
With "ZipFoundation" I tried:
let fileManager = FileManager()
let archive = openjdkZipUrl
let destinationURL = openjdkFolderUrl
do {
try fileManager.unzipItem(at: archive.url, to: destinationURL)
} catch {
}
ZipFoundation told me "Value of type 'FileManager' has no member 'unzipItem'" but I imported it with import Foundation. I also have it (and the other libraries) in my Podfile.
With "SSZipArchive" I tried:
let success = SSZipArchive.unzipFile(atPath: openjdkZipUrl!.path, toDestination: openjdkFolderUrl!.path)
The used paths are
let openjdkZip = "file:///Users/" + user + "/folder1/folder2/openjdk-11.0.2.zip"
let openjdkZipUrl = URL(string: openjdkZip)
and
let openjdkFolder = "file:///Users/" + user + "/folder1/folder2/openjdk-11.0.2"
let openjdkFolderUrl = URL(string: openjdkFolder)
Is it really a problem that the zip file is not contained in my bundle? Can someone tell me what I did wrong?
Thanks in advance
#trojanfoe mentioned in the comments:
Mac apps are sandboxed by default which means they have no access to a user's files unless they ask for it by getting the user to open the file/folder. You should ensure it's turned off for your app, however you are testing if the file exists and if this is succeeding then it looks like sandboxing is not turned on?
I looked at the .entitlements file in my project and found out that "App Sandbox" was set to "YES". I set it to "NO" and it worked perfectly.
It seems that you can check for a file while in sandbox mode (as I did with my condition) but not access them when trying to unzip them.
Thanks again #trojanfoe :)
I have a text file that I will be reading and writing to. I have gotten the code to read successfully, but am unable to write to the text file again. I want to overwrite everything (not amend).
if let dir : NSString = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.AllDomainsMask, true).first {
let path = dir.stringByAppendingPathComponent("airports.txt")
var strTextToWrite:String = String()
strTextToWrite = "Test"
do {
try strTextToWrite.writeToFile(path, atomically: false, encoding: NSUTF8StringEncoding)
}
catch { print("Error") }
}
The above code doesn't throw an error (i.e. the word 'Error' isn't printed as per my catch code), but the text file remains unedited, retaining the value it had before the code was run.
The text file is contained inside the X-Code project as shown below:
I'm at a real loss here, I don't understand why the code isn't working. I have confirmed that it is being run (by printing the value of strTextToWrite before and after the do statement, and it is definitely running through the do block of code because it isn't being caught by the catch block. The only thing I can think of is that the code is pointing at the wrong file (but the file name is correct, as you can verify with the screenshot above).
What am I doing wrong? Thanks in advance.
You are looking at 2 different files: the one you write to is ~/Documents/airport.txt while the one you see (and check) in Xcode is located in your project folder. To see the update, you need to reference the file in Xcode, not make a copy of it.
Right click airport.txt in your Project Navigator and click Delete > Move to Trash
Go to ~/Documents/airport.csv and drag it into your Xcode project. Do not add it to any target and unselect "Copy Items if Necessary"
You now have created a link to the file.
Modifying files in your bundle is generally a bad idea. If you need a place to output a temporary file, use the app's subfolder under ~/Application Support or the system's temp folder.
I'd like to list the contents of an external directory in Swift 2. It seems easy enough for a local directory, but I just can't figure it out with an external directory. Here is my code:
var theUrlString = "https://great-castles.com/images/berkeley/"
var theUrl = NSURL(string: theUrlString)!
do {
let directoryContents = try NSFileManager.defaultManager().contentsOfDirectoryAtURL(theUrl, includingPropertiesForKeys: nil, options: NSDirectoryEnumerationOptions())
print(directoryContents)
} catch let error as NSError {
print(error.localizedDescription)
}
In the playground, I am getting the error:
The file “berkeley” couldn’t be opened because there is no such file
Note that I just threw a random URL in there as an example. But it is accessible, so I should be able to get a list of the files, right? Does NSFileManager.defaultManager think I am referring to a local file?
What I'd really like to do is copy the contents of an online directory into the document directory on the device. If the above isn't possible, any ideas on the best way to do that?