Swift Inheritance: Code Reusability and Class Hierarchy

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by The Captain

April 20, 2024
Working with Inheritance in Swift

Working with Inheritance in Swift

Inheritance is a key feature in object-oriented programming that allows a class to inherit properties and methods from another class. In Swift, classes can inherit from a single superclass, making it a great way to reuse code and create a hierarchy of related classes. Let's explore how to work with inheritance in Swift with a simple example:

// Defining a superclass
class Vehicle {
    var brand: String
    init(brand: String) {
        self.brand = brand
    func drive() {
        print("The \(brand) is driving")

// Creating a subclass
class Car: Vehicle {
    var model: String
    init(brand: String, model: String) {
        self.model = model
        super.init(brand: brand)
    func honk() {
        print("The \(brand) \(model) is honking")

// Using inheritance
let myCar = Car(brand: "Toyota", model: "Corolla")

In the code snippet above, we have a `Vehicle` class as the superclass and a `Car` class as a subclass that inherits from `Vehicle`. The `Car` class has its own property `model` and method `honk`, while also inheriting the `drive` method from the `Vehicle` class.

When creating an instance of `Car`, we instantiate it with both the `brand` and `model` properties. We can then call methods from both the superclass and the subclass on the instance.

Working with inheritance in Swift allows for code reusability and promotes a hierarchical organization of classes. It is essential to understand how inheritance works to effectively structure your Swift codebase.