Returns whether the promised item can be reached.
- iOS 8.0+
- macOS 10.10+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 2.0+
The error that occurred when the promised item could not be reached.
YES if the promised item is reachable; otherwise,
This method behaves identically to
check, but works on promised items. A promised item is not guaranteed to have its contents in the file system until you use a file coordinator to perform a coordinated read on its URL, which causes the contents to be downloaded or otherwise generated. Promised item URLs are returned by various APIs, including:
The contents of the directory returned by the file manager’s
Ubiquitous Container Identifier:
The URL inside the accessor block of a coordinated read or write operation that used the
Coordinator Reading Immediately Available Metadata Only
Coordinator Writing For Deleting
Coordinator Writing For Moving
Coordinator Writing Content Independent Metadata Only
You must use this method instead of
check for any URLs returned by these methods.