Errors when writing to Application Support directory - ios

Question

I've seen this question asked a dozen times on here and yet the solution do not seem to solve my situation.
I have some content that needs to be stored in the 'Application Support' directory, but I continue receiving errors when trying to write there.
func assetFilesDirectory(asset: Asset, shouldCreate: Bool) -> URL? {
do {
let applicationSupportFolderURL = try FileManager.default.url(for: .applicationSupportDirectory, in: .userDomainMask, appropriateFor: nil, create: false)
let folder = applicationSupportFolderURL.appendingPathComponent("\(asset)")
if !FileManager.default.fileExists(atPath: folder.path) {
if shouldCreate {
try FileManager.default.createDirectory(at: folder, withIntermediateDirectories: true, attributes: nil)
} else {
return nil
}
}
return folder
} catch {
print(error)
return nil
}
}
When this code runs, I keep getting the following error:
"You don’t have permission to save the file “asset-backgrounds” in the folder “Application Support”."
I've tried toggling the value for the create parameter in the following line, but I get the same error with that too, just referencing the Application Support directory and Library instead.
let applicationSupportFolderURL = try FileManager.default.url(for: .applicationSupportDirectory, in: .userDomainMask, appropriateFor: nil, create: false)
I haven't seen any reason why this should make any difference API-wise, but as information, I am running this code on the tvOS platform (physical device). There is no information indicating that Application Support should be permission-restricted on tvOS though.

Answer 1

I replaced your Asset (whatever that is) with a string and it worked fine:
func assetFilesDirectory(name: String, shouldCreate: Bool) -> URL? {
do {
let applicationSupportFolderURL = try FileManager.default.url(for: .applicationSupportDirectory, in: .userDomainMask, appropriateFor: nil, create: false)
let folder = applicationSupportFolderURL.appendingPathComponent(name)
if !FileManager.default.fileExists(atPath: folder.path) {
if shouldCreate {
try FileManager.default.createDirectory(at: folder, withIntermediateDirectories: true, attributes: nil)
print("ok")
} else {
return nil
}
}
return folder
} catch {
print(error)
return nil
}
}
I called
let url = self.assetFilesDirectory(name: "test", shouldCreate: true)
print(url)
and I got back "ok" and the URL file:///blahblahblah/Library/Application%20Support/test which is just what one would expect.