Скачать или смотреть Change Background Color of Multiple Buttons on SwiftUI

Struggling to change the background color of a specific button in SwiftUI? This guide explains how to effectively manage button states and customize colors per tap.
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Change Background Color of Multiple Buttons on SwiftUI: A Step-by-Step Guide

If you're developing a SwiftUI application and have encountered a situation where you want to change the background color of a specific button when tapped—you're not alone! This is a common challenge among developers. Many find it confusing when all buttons change color instead of just the one that was tapped. In this guide, we will explore a clear solution to this problem, so your application can respond precisely to user interactions. Let’s dive in!

Understanding the Problem

When working with buttons in SwiftUI, you might have noticed that the state (or color) changes can affect all buttons if they share the same state variable. This is particularly frustrating when you want only the tapped button to change its background color. The primary issue lies in the way state is managed for the buttons.

In your initial setup, you might have a structure like this:

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In this scenario, all buttons reference the same state variable didTap, leading to a cascading effect where tapping one button inadvertently causes all buttons to change color. The solution is to associate a unique state for each button.

Step-by-Step Solution

1. Create a Custom Button View

The first step is to create a new custom button view that encapsulates its own state. This way, each button retains its individuality. Here’s how to create a custom button view called MyButton:

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2. Update the Parent View

Once you have your custom button created, the next step is to utilize it in your parent view. Here’s how to implement it using the ForEach loop:

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Make sure that isNight and variableTitle are declared as @ State variables in the parent view. This ensures that your custom buttons can correctly access and modify the necessary state variables.

3. Result

By following these steps, each button can independently manage its own state. When you tap a button, only that specific button's background color changes, offering a more intuitive and responsive user experience.

Conclusion

Creating a SwiftUI application that reacts to user actions requires careful management of state. By encapsulating button color changes within a custom button view, you can ensure that only the button that was tapped changes its appearance, enhancing usability in your app. Now you can confidently implement this technique in your projects to improve your app’s interactivity.

Feel free to experiment with different colors and states to suit your application’s design. Happy coding!