11.2 A Swift Inheritance Example

As with most programming concepts, the subject of inheritance in Swift is perhaps best illustrated with an example. In “The Basics of Swift Object-Oriented Programming” we created a class named BankAccount designed to hold a bank account number and corresponding current balance. The BankAccount class contained both properties and instance methods. A simplified declaration for this class is reproduced below:

class BankAccount {

 

    var accountBalance: Float

    var accountNumber: Int

 

    init(number: Int, balance: Float)

    {

        accountNumber = number

        accountBalance = balance

    }

 

    func displayBalance()

    {

    ...