Informs the delegate that one object is being substituted for another.
- iOS 2.0+
- macOS 10.2+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 2.0+
An unarchiver for which the receiver is the delegate.
An object in the archive.
The object with which
This method is called even when the delegate itself is doing, or has done, the substitution with
The delegate may use this method if it is keeping track of the encoded or decoded objects.