Скачать или смотреть Passing Data Between Components in React Native

Learn how to effectively pass data between components in `React Native` using functional components and hooks. Explore practical examples for better understanding.
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This video is based on the question https://stackoverflow.com/q/72350485/ asked by the user 'Albert Lorenzo' ( https://stackoverflow.com/u/6310474/ ) and on the answer https://stackoverflow.com/a/72350838/ provided by the user 'Thanhal P A' ( https://stackoverflow.com/u/10657559/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Passing Data Between Components in React Native: A Simple Guide

When building applications with React Native, one common challenge developers face is passing data between components. This might seem tricky at first, especially for those getting started with functional components and hooks. Today, we’ll tackle this issue head-on with a clear solution and practical examples.

The Problem at Hand

In many apps, user interaction often requires us to gather input from various forms and pass that information to the parent component. For instance:

You might have a login form that captures the user's email and password.

When the user presses the submit button, the app needs to access this data to proceed further.

In our case, the question popped up regarding capturing email and password values in a Form component and utilizing them in the App component. This is a common situation, but how do we achieve this using functional components?

Solution Overview

To pass data between the Form component and the App component, you can utilize the useState hook in the parent component (App.js) and pass down the setState functions as props to the child component (Form.js). This allows the child component to update the parent's state.

Step 1: Setting Up the App Component

Let's modify our App.js as follows:

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

Explanation of Changes

State Initialization: We declared email and password state variables using useState.

Passing Props: The setEmail and setPassword functions are passed as props to the Form component.

Step 2: Modifying the Form Component

Now, let's update the Form.js component to make use of the passed props:

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

Explanation of Changes in Form

Props Usage: We used the setEmail and setPassword functions from props to handle user input in the TextInput fields.

Conclusion

By following the steps above, you've now successfully passed data between components in React Native. This approach allows your components to communicate effectively and manage state seamlessly.

With practice, passing data between components using useState will become second nature. So get coding, and build those amazing React Native apps with greater confidence!