How to Dynamically Render a View Based on Selected Picker in React Native

Discover how to create a dynamic view that updates based on the selected item from a Picker in React Native. This blog explains step-by-step how to implement it successfully.
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How to Dynamically Render a View Based on Selected Picker in React Native

Using a Picker component in React Native can enhance user experience by allowing users to select from a list of options. However, if you want to dynamically update your view based on the selected item, it can be a bit tricky, especially for newcomers. In this guide, we'll explore how to achieve this, focusing on key concepts and guiding you through a successful implementation.

The Challenge

Imagine you have multiple information components you want to display, but only one of them should show based on the user’s selection from a Picker. This common issue often leaves new React Native developers wondering how best to implement it. Let's discuss how to overcome this challenge effectively.

Your Original Code

Initially, you might have a setup that resembles the following code:

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

The issues arise because only string or component references can be passed in the value prop of the Picker.Item. Let’s rewrite the architecture to focus on dynamically rendering components based on your selection.

The Solution

1. Import Correctly

Ensure your information components (InfoA, InfoB, InfoC) are imported correctly. This is essential to avoid errors associated with undefined elements.

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

2. Modify the State Handling

Instead of directly using the component in the value of the picker, use a simple string or number for identification. Modify your Picker implementation as shown below:

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

3. Implement a Switch Case

To render the correct component based on the selected Picker value, you should utilize a method that manages the rendering logic, typically with a switch statement like so:

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

4. Complete Render Method

Finally, your updated component will look like this:

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

Conclusion

Now you have a complete understanding of how to render your view dynamically based on the Picker component's selection in React Native. Remember to correctly import your components and use strings for value assignments in the Picker. Utilizing methods like the switch statement allows for a cleaner and more readable approach to controlled rendering.

Happy coding, and may your applications become more interactive and user-friendly!