Classes

Declaring

class PersonBaseClass {
    var firstName: String = ""
    var lastName: String = ""
    
    func getFullName () -> String {
        return "\(firstName) \(lastName)";
    }
}

Subclassing

Terminology in Swift

• Subclassing = Inheriting "I need to subclass ObjectClass." (You need to inherit ObjectClass.)
• Subclass = Derived Class, Child Class
• Superclass = Base Class, Parent Class

In this example we are "subclassing" the PersonBaseClass:

class Mother : PersonBaseClass {
    
    var maidenName: String = ""
    
    func setIdentity (firstName: String, lastName: String) {
        // Find members of the superclass by using the word "super".
        super.firstName = firstName
        super.lastName = lastName
        
        // Find members in this class by using the word "self".
        self.maidenName = lastName
    }
    
    override func getFullName() -> String {
        return super.getFullName() + " (\(maidenName))"
    }
}

Instantiating and Using

var me = PersonBaseClass()
me.firstName = "Mark"
me.lastName = "Moeykens"
me.getFullName()

var mom = Mother()
mom.firstName = "Beth"
mom.lastName = "Moeykens"
mom.maidenName = "Marr"
mom.getFullName()