ios - swift NSKeyedArchiver : Do custom members of an NSCoding-conformant class need to conform to NSCoding as well?

Question

假设我有这个 Swift 类:

class Foo: NSObject, NSCoding
{
    var stringMember: String
    var intMember: Int
    var customObjectMember: CustomObject
    //conforms with encode and required init...
}

我知道“Foo”必须符合 NSCoding，这样我才能存档它。成员“customObject”是否也必须符合 NSCoding/NSObject 还是可以是常规 Swift 类？

Answer 1

答案是"is"。自定义对象成员也必须符合 NSCoding。