How to display a conditional Age Restriction pop-up in Flutter

Learn how to effectively show a pop-up in Flutter based on user age, utilizing shared preferences to manage conditions efficiently.
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This video is based on the question https://stackoverflow.com/q/64589480/ asked by the user 'Rock' ( https://stackoverflow.com/u/9165895/ ) and on the answer https://stackoverflow.com/a/64624996/ provided by the user 'Mehmet Yaz' ( https://stackoverflow.com/u/14551620/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Implementing a Conditional Age Restriction Pop-up in Flutter

As developers, we often face challenges when it comes to displaying user-specific messages or pop-ups in our applications. A common scenario is to prompt users about age restrictions, ensuring that they receive the message only when necessary. This guide will guide you through implementing an Age Restriction pop-up in Flutter that appears based on the value of a stored age variable, using shared preferences to manage state effectively.

The Problem

You want to create a pop-up in your Flutter app that informs users of age restrictions. The condition for displaying this pop-up is based on the value of a string variable called ageRestriction. If the ageRestriction changes — for example, from "18" to "20" — the pop-up should show again. However, when the ageRestriction returns to "18", it should not display the pop-up a second time, if it has already been shown. You attempted to manage this with shared preferences but faced challenges in implementing the logic successfully.

The Proposed Solution

Here's how to resolve the pop-up display issue by properly managing the age restrictions stored in shared preferences. Follow the organized steps below to implement the solution effectively.

Step 1: Setting Up SharedPreferences

Begin by defining the necessary functions for managing your age restriction list in shared preferences. This includes storing and retrieving age values.

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Step 2: Creating the Pop-up Functionality

To manage the pop-up display, modify your button's onTap function. This function should check if the ageRestriction has already been shown before deciding whether to display the pop-up.

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Conclusion

By following these steps, you can successfully implement a conditional Age Restriction pop-up in your Flutter application. Throughout this process, we utilized shared preferences to effectively manage the display conditions, ensuring that the pop-up appears only under the correct circumstances. This approach not only enhances user experience but also reinforces the application’s age policies.

Feel free to adjust the code snippets to fit your specific application needs. Happy coding!