Indicates whether the contents of a file wrapper matches a directory, regular file, or symbolic link on disk.
- iOS 4.0+
- macOS 10.6+
- tvOS 9.0+
- watchOS 2.0+
URL of the file-system node with which to compare the file wrapper.
YES when the contents of the file wrapper match the contents of
The contents of files are not compared; matching of regular files is based on file modification dates. For a directory, children are compared against the files in the directory, recursively.
Because children of directory file wrappers are not read immediately by the
init method unless the
NSFile reading option is used, even a newly-created directory file wrapper might not have the same contents as the directory on disk. You can use this method to determine whether the file wrapper's contents in memory need to be updated.
If the file wrapper needs updating, use the
read method with the
NSFile reading option.
This table describes which attributes of the file wrapper and file-system node are compared to determine whether the file wrapper matches the node on disk:
Modification date and access permissions.