objective c - NSSecureCoding VS saving id

Question

i am on objective-c, macOS.

I am currently rewriting an application to support NSSecureCoding Protocol. In some classes i have some properties like this

@property id objectValue;

These objects can be of very dynamic kind (NSString, custom object ...) On loading i did this before:

_objectValue = [coder decodeObjectForKey:@"objectValue"];

With NSSecureCoding i need to specify the class which i cannot do with id obviously. So here are my questions:

1. Is it OK to pass a superclass like NSObject even if it's basically an NSString?

   _objectValue = [coder decodeObjectOfClass:[NSObject class] forKey:@"objectValue"];
   

   But... doesn't this counteract the idea of NSSecureCoding?

2. Is there another (better) approach?

Edit: Just seen that this is possible with multiple classes decodeObjectOfClasses:forKey: - would the correct approach be to list all classes possible?

Answer 1

等待大神答复