When it comes to developing apps, developers are always looking for solutions that are universally acceptable for the problems they solve. This makes their jobs easier ensuring they don’t waste time on common problems.

What are design patterns?

A software design pattern is a generally repeatable solution to problems that occur in software when you’re undergoing the design process. It is not a piece of code that you can simply input into your application to fix the problem. Instead, the design pattern will show you the general concept for how the problem can be solved.

Think of it like this. A code template is like a recipe for a cake. You have all the instructions written down and you have to follow them. But a design pattern is if someone creates an explainer video about making the cake, but instead of instructions and audio, there is a visual demonstration of how to make the cake.

What are swift design patterns?

Swift is a programming language that was developed by Apple in 2014. It is the successor to the previously used Objective-C and is officially used in the creation of all of their products. Swift is a well-known name in the app development world and there are many iOS developers out there who use it frequently when creating new apps.

Some of the most popular brands that use Swift design patterns for SaaS app development include Uber, AirBnB, Lyft, and Hubspot. Find out more details here about Saas solutions.

Popular Choices Today

  1. The MVC Pattern – Model View Controller is one pattern that Apple encourages developers to use. It breaks down to:
  • model – Manages the data and rules of the application;
  • view – Details how to display the model on the UI;
  • controller – Works with the actions taken by the user of the app.

This one is used to create a structure for the data flow inside an application. By doing this, you are creating a level of “responsibility” that each pattern layer has for the different aspects of the applications.

  1. The Adapter Pattern – This works with objects and the structure of the app. You can use it to make different objects that are usually incompatible, work together. To do this it will first transform the interface of one of the objects so that it adapts to the interface of another object.

Ideally you would use this when one of your new objects doesn’t match the rest of your application’s code but you need to add it in anyway.

  1. The Wrapper Pattern – Also known as the Decorator design pattern, this one allows you to add more functionality to an object by wrapping them in something called “wrappers.” The basic idea is that you take an object and place it inside of the “wrapped object”. By doing this, you will trigger the first object’s behaviour, thus adding this functionality to the functionality already present in the “wrapped object”.

On the surface, users will not know if an action occurs because of a wrapped object or not. Therefore, you are free to use multiple wrapped objects inside of each other and build a lot of functionality from them.

  1. The Memento Pattern – This design pattern allows you to save an object and then be able to restore it back to its normal state with giving out the details on how this change was implemented. This is useful when you are trying to use an object which has its internal data structure hidden and inaccessible. There are three objects being used:
  • originator – An object with an internal state. It is able to capture its current state and also revert back to its normal state as required;
  • memento – This is the one object that should not be changed. This is a copy of the original state of the object;
  • caretaker – This is responsible for holding onto the memento and then returning it back to the creator when required.

Conclusion

There is no definite conclusion to what are the best swift design patterns out there is. Depending on the team and the application that is being created, a different design pattern can be used to its full benefit. Read more about swift design patterns here. As an iOS developer, you should definitely know which ones to choose to organize the software development process.

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