Open Radar

 
Summary:
When checking NSMetadataUbiquitousItemPercentDownloadedKey attribute value,  it changes from 0 to 99.9 (or 100). No value in between. This kind of behavior makes the NSMetadataUbiquitousItemPercentDownloadedKey usless to follow the download progress.

It happens even though the NSMetadataQueryDidUpdateNotification is received in between. Not that NSMetadataQueryDidUpdateNotification is often received when the file is downloaded, yet I wanted to emphasize that.


Steps to Reproduce:
1. In the iCloud Drive container find the file that is not downloaded locally
2. Register observer for NSMetadataQueryDidUpdateNotification
3. Start downloading the file [fileManager startDownloadingUbiquitousItemAtURL:ubiquitousURL error:&error]
4. Check value of NSMetadataUbiquitousItemPercentDownloadedKey for the NSMetadataItem that represents the ubiquitousURL. e.g. [metadataItem valueForAttribute:NSMetadataUbiquitousItemPercentDownloadedKey];

Expected Results:
The value of NSMetadataUbiquitousItemPercentDownloadedKey increases from 0 to 100 incrementally e.g. with the values 0, 1, 4, 10, 13, 20, 50, 65, 70, 75, 81, 95, 100

Actual Results:
The value of NSMetadataUbiquitousItemPercentDownloadedKey starts with value 0, then changes to 100 when a file is downloaded, without any other value in the middle.

Version:
10.x

Notes: