NSFileManager startDownloadingUbiquitousItemAtURL not working correctly on iOS14

Question

I have an App in the AppStore since 2013 and it always worked flawlessly. It creates and syncs files on iCloud.

Since iOS14 startDownloadingUbiquitousItemAtURL only downloads a fraction of the existing files. If I start the App in the simulator and iOS14 (and of course on the real devices as well). If I start the App in a simulator using iOS12 or 13 it works as expected.

I don't find anything on the web regarding possible changes in the startDownloadingUbiquitousItemAtURL method.

Here's the code in question:

...
BOOL tt =  [[NSFileManager defaultManager] startDownloadingUbiquitousItemAtURL:cloudFileUrl error:&error] ;

if (error != nil)
{
    NSLog(@"ERROR Loading %@", cloudFileUrl) ;
}
...

tt is true and error is nil, so it seems the sync process has started correctly

However, If I try to access the files with

NSArray *dirContent = [[NSFileManager defaultManager] contentsOfDirectoryAtURL:cloudFileUrl includingPropertiesForKeys:[[NSArray alloc] initWithObjects:NSURLNameKey, nil] options:NSDirectoryEnumerationSkipsHiddenFiles error:&error];

The the array dirContent contains only 3 or 4 elements, even though the folder contains 10 files.

Any idea what the problem could be? I have opened a bug with Apple as well.

Answer 1

Ok, the solution ist that this call does not read some files when they are binary. Alleged text files were found.

NSArray *dirContent = [[NSFileManager defaultManager] contentsOfDirectoryAtURL:cloudFileUrl includingPropertiesForKeys:[[NSArray alloc] initWithObjects:NSURLNameKey, nil] options:NSDirectoryEnumerationSkipsHiddenFiles error:&error];

I've replaced the call with this

NSArray *dirContent = [[NSFileManager defaultManager] contentsOfDirectoryAtURL:cloudFileUrl includingPropertiesForKeys:[[NSArray alloc] initWithObjects:NSURLNameKey, nil] options:0 error:&error];

and now it works again.