-[NSKeyedUnarchiver validateAllowedClass:forKey:] allowed unarchiving safe plist type ''NSString' (0x1e1552fd8) [/System/Library/Frameworks/Foundation.framework]'

[bukira]

I am getting the following error

-[NSKeyedUnarchiver validateAllowedClass:forKey:] allowed unarchiving safe plist type ''NSString' (0x1e1552fd8) [/System/Library/Frameworks/Foundation.framework]' for key '********', even though it was not explicitly included in the client allowed classes set: '{( )}'. This will be disallowed in the future.

I think this is an error in Defaults as I am using defaults to save a custom object and the object conforms to __DefaultsSerializable_

if found this

Specifying the type here fixed it: override static var allowedTopLevelClasses: [AnyClass] {
return [NSArray.self, NSString.self]
}

[sindresorhus]

Is it a logged warning or an error?

It would be great if you could submit a failing test.

[bukira]

it is a logged warning, it works fine now but I get the error repeatedly every time I access Defaults[.myValue]

[sindresorhus]

This warning comes from Foundation when init(coder:) decodes without an explicit allowed classes list. It usually means the type uses decodeObject(forKey:) or does not include all classes for collections. Defaults uses unarchivedObject(ofClass:from:) so it is not the source. Please update init(coder:) to use decodeObject(of:forKey:) for single values and decodeObject(ofClasses:forKey:) for arrays or dictionaries, listing NSString, NSArray, and other classes as needed. That should remove the warning.