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Discover how to customize the text styles in your Flutter application's `BottomNavigationBarItem` with an easy-to-follow solution.
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How to Add TextStyle to Labels in BottomNavigationBarItem in Flutter

Flutter is one of the most popular frameworks for building cross-platform mobile applications. However, with frequent updates, developers sometimes encounter issues when adapting to new changes. One common challenge users faced after upgrading to Flutter 1.22 is the deprecation of the title parameter in the BottomNavigationBarItem. This shift has left many wondering how to add custom text styles to their navigation labels. In this guide, we will explore a straightforward solution to this problem.

Understanding the Problem

In previous versions of Flutter, developers could easily define styles using the Text() widget with the title parameter in BottomNavigationBarItem. However, with the introduction of Flutter 1.22, this method is deprecated, and the new label parameter only accepts a string. This means that changing text styles in the navigation bar is not as straightforward as before.

Here’s a quick look at how one might have structured their BottomNavigationBarItem before the update:

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

Now, with the update, you can only do:

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

The Solution

To customize the text style of your labels after the update, you can utilize the new properties selectedLabelStyle and unselectedLabelStyle in the BottomNavigationBar. This allows you to define styles for both selected and unselected labels in a clean and efficient way.

Step-by-Step Implementation

Here's how you can implement this solution in your Flutter app:

Define Your TextStyles: Before implementing the BottomNavigationBar, define your desired text styles.

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

Update Your BottomNavigationBar: Integrate the text styles into your BottomNavigationBar.

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Example Code

Combining all the steps above, here’s a complete example of how your BottomNavigationBar might look:

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

Conclusion

With the update to Flutter 1.22, customizing the appearance of labels in BottomNavigationBarItem now requires a different approach, but it can still be easily achieved. By leveraging selectedLabelStyle and unselectedLabelStyle, you can maintain your design's integrity while adapting to the latest version of Flutter.

Now go ahead and implement these changes in your app. Happy coding!