Скачать или смотреть How to Hide the Bottom Bar on Modal Screens in React Navigation

Discover the solution to hide the bottom tab bar when presenting a modal screen in your React Native app. This guide breaks down the process step-by-step for both iOS and Android.
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This video is based on the question https://stackoverflow.com/q/69881530/ asked by the user 'klefevre' ( https://stackoverflow.com/u/553488/ ) and on the answer https://stackoverflow.com/a/69881712/ provided by the user 'nima' ( https://stackoverflow.com/u/5737950/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Hiding the Bottom Bar on Modal Screens in React Navigation

If you've been developing with React Native and implementing a bottom tab navigator using react-navigation, you might have encountered a common challenge: hiding the bottom tab bar when presenting a modal screen. This issue can be particularly frustrating if it behaves differently on iOS compared to Android. In this guide, we will guide you step-by-step on how to hide the bottom bar whenever a modal screen is displayed in your app.

Understanding the Problem

The Challenge

You have a bottom tab navigator in your app, and you want to present a modal screen from one of the tabs without showing the bottom tab bar. While this works perfectly on iOS, you may notice that the bottom tab remains visible on Android devices, which can detract from your app's user experience.

Your Current Setup

Here's a quick summary of your existing setup:

Bottom Tab Navigator:

This navigator includes all your application tabs.

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

Stack Navigator:

It contains different screens, including one that should be presented modally without the bottom bar.

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

Screen Transition:

Navigating to the modal screen can be done as follows:

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

The Solution: Conditional Visibility of the Tab Bar

To solve this problem, we can leverage the navigation props and implement conditional logic based on the current screen name. Follow these steps to hide the bottom tab bar when your modal is active:

Step 1: Use getFocusedRouteNameFromRoute

This function allows you to get the name of the currently focused route, which helps in identifying if the current screen is the modal. First, make sure to import the function from react-navigation:

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

Step 2: Update the HomeStack Component

You need to enhance your HomeStack component to include a layout effect. This effect checks the currently focused route and toggles the tab bar's visibility accordingly:

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

Step 3: Test on Both Platforms

After implementing the above changes, make sure to test your application on both iOS and Android devices to ensure that the bottom tab bar behaves as expected.

Conclusion

Hiding the bottom tab bar on modal screens can enhance the user experience in your React Native application. By implementing conditional visibility based on the currently focused route, you can ensure that your modal screens appear clean and distraction-free, providing users with a seamless transition.

If you encounter any issues or have further questions, feel free to reach out or leave a comment below. Happy coding!