overriding static vars in subclasses swift 1.2

Question

unlike class var, where they can overridden in subclasses, I believe same applies to static as well but unfortunately not. Here\'s an example

Answer 1

As suggested, you cannot override static variables but can use class (static) function to override.

class A {
   class func StaticValue() -> AnyObject {
      return "I am a String"
   }
}

class B: A {
    override class func StaticValue() -> AnyObject {
        return 2
    }
}

Answer 2

You can have computed class properties:

public class A {
   class var NAME: String {
       return "A"
   }
}

public class B {
   class var NAME: String {
       return "B"
   }
}

If need be, you could even "branch" to a stored property in the subclass:

public class A {
       // Needs to be overriden in subclass
       class var NAME: String {
           return "A"
       }
    }

public class B {
   class var NAME: String {
       return B.storedName
   }

   static var storedName: String = defineName()

   func defineName() -> String {
       // You could do something more complex here
       return "B"
   }
}

Answer 3

You can use computed properties:

class A {
   class var Name: String {
       return "A"
   }
}

class B: A {
   override class var Name: String {
       return "B"
   }
}

Usage:

print(A.Name) // "A"
print(B.Name) // "B"

Answer 4

The documentation says:

“ static ” methods and properties are now allowed in classes (as an alias for “ class final ”).

So it is final, which means you cannot override it.