Use of Singleton Pattern in Swift

Updated 16 January 2024


Hi folks, today we will have a quick look at the Singleton Pattern in Swift. In this blog, we will also check how and why should we use Singleton on our code.

Singleton Pattern in Swift

What is Singleton?

In Swift, a singleton is a design pattern that ensures that a class will have only one instance and provide a global point of access to that instance.

Singleton initializes your class instance only once with static property and it will share your class instance globally throughout the application.

your class instance globally throughout the application.

Before we dig deeper into the Singletone, check out our Flutter App Development Services.

Implementation of Singleton Pattern in Swift

Check out the step-by-step process for converting a class to a singleton class.

Step 1:- Create a Simple Class

Here we will create a class named SingletonTest and add some methods and properties to it.

Step 2:- Mark the init method Private

By marking the init method of the class private, it will become inaccessible outside the class and will not allow any variable to create an instance of it. With this, we have successfully created a singleton class out of a regular class.

Step 3:- Access the Methods of the class

As we know, to access the method of any class we need to have an instance of it. Now since we cannot access our singleton class outside of its scope we need to initialize a class within the scope.

Once we created the instance of the class we can now access the methods and properties of the SingletonTest class by accessing the instance of the class.

Why and Where to Use Singleton

A basic idea behind using singleton classes is memory management. As it provides Global Access and by using a single instance for the class it doesn’t allocate separate memory for every reference.

Singleton classes can be used in various scenarios where we are using a class for a single common purpose like network calling, data storage and session management.


So, In this article, we have learned how can we implement singleton patterns in our classes and their use cases.

You can also check more informative blogs on Swift with Mobikul Blogs.

. . .

Leave a Comment

Your email address will not be published. Required fields are marked*

Be the first to comment.

Start a Project

    Message Sent!

    If you have more details or questions, you can reply to the received confirmation email.

    Back to Home