I read others few topics about it, but still I'm lost. I want to create 2 kind of objects, one immutable with only "readonly" properties, and one mutable with only "readwrite" properties. Lets ca...

I've created a custom class which conforms to NSCopying and NSMutableCopying. I've added an implementation for -copyWithZone: and -mutableCopyWithZone:, but whenever I call -mutableCopy on my obje...