How to Dynamically Change Image Sources on Press in React Native

Learn how to manage image state in `React Native` by changing image sources dynamically based on user interaction, using likes and unlikes as an example.
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How to Dynamically Change Image Sources on Press in React Native

In the world of mobile app development, interactions are key to creating a responsive and engaging user experience. One common task is changing an image based on user actions, like liking or unrewarding content. If you're using React Native, you may have come across a challenge — handling image source changes without the standard DOM elements you might be used to in React. In this guide, we'll walk you through this process by creating a simple like/unlike functionality that changes the image displayed based on the user's action.

The Problem

The Solution

Setting Up the Component

To achieve the desired behavior, we'll use the useState hook to manage the state of liked images. Here's a breakdown of the solution:

Import necessary modules: Ensure you import React, the necessary hooks, and any images you will need.

Define the initial state: Utilize the useState hook to keep track of which images are liked.

Create the handler function: Write a function to toggle the liked state of the images when tapped.

Render the images: Map over your state array to render an image for each object, changing the source based on its liked status.

Step-by-Step Implementation

Here’s how to set up your LikesComponent using the example discussed:

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

Explanation of the Code

Importing Images: Both the liked and unliked images are imported at the top of the file.

State Management: We use useState to manage the current state of images, allowing us to dynamically rerender the UI as images are liked or unliked.

Dynamic Source Assignment: In the map function, the source of the image is determined based on the liked property of each object. If it’s liked, we display the liked image; otherwise, we display the unliked image.

Event Handling: The onPress event calls handleLikes, effectively toggling the liked state of the specific image clicked.

Final Thoughts

This simple example demonstrates how you can manage dynamic image sources based on user interactions in React Native. By leveraging the power of hooks and state management, you can create a more interactive application that responds to user behavior seamlessly. Follow the steps outlined above to incorporate similar functionality into your own projects.

Now it’s your turn! Try implementing this code in an application of your own and see how it enhances user experience.