Returns all versions of the specified file except the current version.
- iOS 5.0+
- macOS 10.7+
- UIKit for Mac 13.0+Beta
- tvOS 9.0+
- watchOS 2.0+
The URL of the file whose versions you want.
An array of file version objects or
nil if there is no such file. The array does not contain the version object returned by the
For locally based files, this property typically contains versions of the file that you saved explicitly or that were saved at appropriate times while the file was being edited. For documents residing in the cloud, this property typically returns zero or more file versions representing conflicting versions of a file that need to be resolved with the current version.