Скачать или смотреть Get the Key Value with TouchableOpacity in React Native

Learn how to retrieve key values from an array of objects in React Native using TouchableOpacity. This guide offers a step-by-step solution to manage user interactions effectively.
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This video is based on the question https://stackoverflow.com/q/67490117/ asked by the user 'Telmo Reis' ( https://stackoverflow.com/u/15898239/ ) and on the answer https://stackoverflow.com/a/67493151/ provided by the user 'Lee Brindley' ( https://stackoverflow.com/u/1735653/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Get the Key Value with TouchableOpacity in React Native: A Comprehensive Guide

If you're new to React Native and working on an internship, you might find it challenging to handle user interactions, especially when it comes to retrieving values from an array of items, such as a news list fetched from an API. This guide will guide you on how to successfully click on an item and get the respective key value—solving a common obstacle faced by many beginners.

Understanding the Problem

The scenario involves mapping over an array called noticias, which contains news details—title, subject, and date. Your goal is to tap on a TouchableOpacity that represents each news item and retrieve its details to show more information. The challenge arises when trying to store the respective key value to ensure the correct data is displayed.

Sample Code Setup

Here's the initial structure of what your code might look like:

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

From this code, you may notice that while you are setting up the TouchableOpacity to potentially handle clicks, you haven't yet defined how to pass the relevant news item values to the click handler function.

The Solution

To achieve the desired functionality, you need to modify the onPress event in your TouchableOpacity. The key is to use the bind method properly to pass in both the item and its index as parameters.

Code Modification

Here’s the amended version of your code that includes passing the necessary parameters:

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

How It Works

using bind: In the modified code, the bind method is called with this, the current noticias item, and its index i.

the mostrarNoticia function:

By doing this, when the function mostrarNoticia is invoked upon pressing the TouchableOpacity, it can access these values.

As shown in the following stubbed function example:

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

This implementation allows you to capture the correct news item's key value, making it possible to display more details or navigate to another screen accordingly.

Conclusion

By properly utilizing the bind function within your React Native code, you can effortlessly access and manage array data during user interactions. As you continue your coding journey, remember that each challenge is an opportunity to sharpen your skills. Keep practicing, and soon you'll be able to tackle even more complex features in app development!

If you have any questions or further clarifications, feel free to leave a comment. Happy coding!