The receiver's read file handle.
- iOS 2.0+
- macOS 10.0+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 2.0+
The descriptor represented by this object is deleted, and the object itself is automatically deallocated when the receiver is deallocated.
You don’t need to send
close to this object or explicitly release the object after you have finished using it.