Скачать или смотреть Sharing State Between Components in React-Native

Discover how to share state between components in React-Native to enhance your app's functionality. Learn simple techniques for managing state effectively!
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This video is based on the question https://stackoverflow.com/q/66230165/ asked by the user 'notgrumpy' ( https://stackoverflow.com/u/14734722/ ) and on the answer https://stackoverflow.com/a/66286702/ provided by the user 'Oak' ( https://stackoverflow.com/u/14410326/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Sharing State Between Components in React-Native: A Step-by-Step Guide

Creating a dynamic application often means sharing data between components. In React-Native, this can sometimes seem daunting, especially for newcomers. Today, we’re walking through a common challenge — managing state across multiple components in a gym management app. Let’s break it down into manageable sections!

The Challenge

You’re building a gym management application that features three components:

Schedule — This component contains a button (the SwitchButton) to toggle the data displayed.

MondayPage — A page that shows either aerobic data or kids’ class data based on the state managed by the SwitchButton.

SwitchButton — A toggle button responsible for switching between data sets.

You're experiencing difficulty in linking the Boolean state, listAerobic, in the MondayPage component to the on/off state of the SwitchButton. Let's dive into how we can effectively share this state.

Proposed Solution

To successfully share state between your components, we’ll need to make some adjustments. We'll ensure that the SwitchButton recognizes changes from MondayPage, thus creating a seamless interaction. Here’s how you can do this:

Step 1: Lift the State Up

Instead of managing the state within individual components, you can "lift" the state up to a common parent component. For instance, let's lift the listAerobic state from the MondayPage into the Schedule component. Here’s what you need to do:

Update the Schedule Component:

Maintain the listAerobic state in the Schedule and pass it down as a prop to both MondayPage and SwitchButton.

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

Step 2: Update the SwitchButton

Now that your SwitchButton will receive props, update it to accept isEnabled and toggleSwitch as props.

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

Step 3: Refactor the MondayPage Component

In the MondayPage, you now directly use the passed prop listAerobic to determine which data to display.

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

Conclusion

By lifting the state up into the Schedule component, you create a shared state that both the SwitchButton and MondayPage can access and update. This technique of pulling state management up to a common ancestor component is a common practice in React applications, making it easier to manage states across components.

As you continue to develop your React-Native app, remember that understanding state management is crucial for creating dynamic and user-friendly applications. Explore state management libraries like Redux or React Context for more advanced state handling — but for now, lifting the state is a solid strategy!

With these changes, your app should be able to toggle between the data sets seamlessly. Happy coding!