# Design Patterns: Facade in Swift – How to Implement It?
Design patterns are a great way to improve the efficiency and maintainability of your code. One of the most popular design patterns is the Facade pattern. This pattern simplifies complex tasks into small, easy-to-manage parts. In this article, we will discuss how to implement the Facade pattern in Swift.
The Facade pattern is a structural design pattern that provides a simple interface for a complex set of tasks. It allows developers to access complex features without having to understand the underlying logic. The Facade pattern is useful when you need to access multiple objects or services at the same time, but don’t want to write complex code to do it.
Let’s say we have a shopping app with different types of products. We need to access the product list, order details, shipping information and payment information. Without using the Facade pattern, we would need to write separate methods for each task. This would lead to a lot of repetitive and redundant code.
Using the Facade pattern, we can instead create a single interface that handles all of our tasks. This interface, or “facade”, simplifies our code by allowing us to access all of the necessary data in one single method.
To implement the Facade pattern in Swift, we need to define a Facade class. This class will contain all of the methods we need to access our data. For example, let’s create a ShoppingFacade class:
“`swift
class ShoppingFacade {
func getProductList() {
// code to get product list
}
func getOrderDetails() {
// code to get order details
}
func getShippingInformation() {
// code to get shipping information
}
func getPaymentInformation() {
// code to get payment information
}
}
“`
In the above example, we have created four methods that each handle a different task. We can then call these methods from within our main application code. For example, if we wanted to get the product list, we could call the `getProductList()` method:
“`swift
let shoppingFacade = ShoppingFacade()
let productList = shoppingFacade.getProductList()
“`
The Facade pattern is a great way to simplify complex tasks. It allows us to access multiple objects or services in one single method, making our code more efficient and maintainable.
In this article, we discussed how to implement the Facade pattern in Swift. We created a ShoppingFacade class with four methods that handle different tasks. We then called these methods from our main application code. With the Facade pattern, we can simplify complex tasks and make our code more efficient and maintainable.