How to Get an enum Value Based on Another enum in SwiftUI

Learn how to access an enum value based on another enum in SwiftUI, and make your code cleaner and more efficient with these simple techniques!
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How to Get an enum Value Based on Another enum in SwiftUI

SwiftUI is a powerful framework for building user interfaces in iOS, and enums are a crucial part of the Swift language that allow developers to work with a set of related values. However, there are times when you may want to derive one enum's value based on another enum's value. In this guide, we will explore two methods to achieve this, ensuring that your code is both clean and efficient.

The Problem

You might have a scenario where you want to get an icon representation based on a gender string. For example, you have two enums: one for the gender as a string and another for the corresponding gender icons. The challenge is to retrieve the icon based on the selected gender value.

Here's a simplified presentation of your enums:

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As is evident from this code snippet, trying to retrieve the icon based on the gender results in some confusion. Let's break down how we can resolve this.

Solution 1: Create a Property on Your Enum

The first approach is to create a computed property within your GenderString enum that returns the corresponding GenderIcon. Here’s how you can implement it:

Code Example

[[See Video to Reveal this Text or Code Snippet]]

Explanation

In the GenderString enum, we introduced a computed property named icon. This property contains a switch statement that returns the appropriate GenderIcon based on the current value of GenderString.

Solution 2: Create an Initializer for the Icon Enum

Another efficient strategy is to set up an initializer in the GenderIcon enum that allows you to create a GenderIcon instance based on a GenderString. Here's how that would look:

Code Example

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Explanation

The GenderIcon enum now includes an initializer that takes a GenderString.

This allows you to directly create a GenderIcon using the GenderString, making your code more intuitive.

Simplifying the Example

An even more streamlined way to manage gender and icon pairs is to combine them into a single enum. This method reduces complexity and enhances clarity, as shown below:

Code Example

[[See Video to Reveal this Text or Code Snippet]]

Explanation

By combining both genders and icons into one enum, you can easily access both properties without needing multiple enums. The icon property here directly correlates to the value of the enum, ensuring clear, maintainable code.

Conclusion

In this guide, we covered how to get an enum value based on another enum in SwiftUI. We discussed two effective methods: using a computed property and an initializer, and then consolidated the solution into a single enum for simplicity and clarity. By applying these techniques, you can enhance the readability and efficiency of your SwiftUI code, making it easier to manage and maintain.

Whether you opt for separate enums or a combined approach, being able to retrieve values based on other enums will certainly streamline your development process. Happy coding!