Informs the delegate that the class with a given name is not available during decoding.
- iOS 2.0+
- macOS 10.2+
- tvOS 9.0+
- watchOS 2.0+
- Mac Catalyst 13.0+Beta
An unarchiver for which the receiver is the delegate.
The name of the class of an object
unarchiveris trying to decode.
An array describing the class hierarchy of the encoded object, where the first element is the class name string of the encoded object, the second element is the class name of its immediate superclass, and so on.
The class unarchiver should use in place of the class named
The delegate may, for example, load some code to introduce the class to the runtime and return the class, or substitute a different class object. If the delegate returns
nil, unarchiving aborts and the method raises an