Exploring the Factory Method Design Pattern in Swift

Ehsan Zeinalinia
1 min readAug 21, 2023

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The Factory Method pattern is a creational design pattern that offers an interface for object creation while enabling subclasses to determine the concrete class instantiation. This fosters loose coupling and simplifies extending and maintaining code.

📝 Implementation:

Let’s explore a Swift implementation using an animal analogy. We begin with an Animal protocol and Dog and Cat classes. The AnimalFactory protocol defines factory methods for DogFactory and CatFactory. The AnimalClient class uses these factories to create and interact with animals.

✅Advantages:

-Flexibility: New product classes (animal types) can be added without altering existing code, as subclasses define their factory methods.

-Decoupling: The Factory Method separates client code from specific class creation, reducing interdependencies.

-Polymorphism: It promotes polymorphism by enabling clients to interact uniformly with products via a shared interface.

❌Disadvantages:

-Complexity: For smaller projects, the Factory Method might seem overly complex due to extra classes and interfaces.

-Boilerplate Code: Each new product demands a corresponding concrete factory class, leading to some repetitive code.

🎉 Conclusions:

The Factory Method design pattern is a valuable asset for boosting flexibility and maintainability in software projects. It encapsulates object creation logic, making it adaptable and easily extensible. Despite potential complexity and boilerplate, its benefits usually outweigh drawbacks in larger projects.
By embracing the Factory Method pattern, developers can elevate their software design skills, creating modular and robust applications. Whether you’re working solo or in a team, this design pattern can elevate your software development journey.

Thanks for reading! 🙏

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Ehsan Zeinalinia

Hi, I'm Ehsan! 🔢 Passionate iOS Developer problem-solver and innovative thinker. 💻 Skilled programmer with experience in various languages.