Скачать или смотреть Unlocking Flutter: Creating Dynamic Widgets Without Duplication

Discover how to avoid duplicate widget code in Flutter by creating dynamic widgets and leveraging item builders for efficient UI design.
---
This video is based on the question https://stackoverflow.com/q/77214553/ asked by the user 'Benyamin' ( https://stackoverflow.com/u/13212264/ ) and on the answer https://stackoverflow.com/a/77214797/ provided by the user 'Md. Yeasin Sheikh' ( https://stackoverflow.com/u/10157127/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Separate function returning a list of widgets as a separate widget

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Unlocking Flutter: Creating Dynamic Widgets Without Duplication

When developing with Flutter, you might encounter a frequent issue: the need to avoid repeating widget-building logic while maintaining clean, efficient code. For instance, you may find yourself wanting to call a function that builds a list of widgets in multiple places, such as in both a Column and a Row. However, calling a function directly in these widget attributes is often viewed as a bad practice in Flutter. So how can you navigate this challenge without falling into the trap of duplicating code? Let’s explore the solution.

The Problem

Imagine you have a function that generates a list of widgets based on a data set, like this:

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

And then you might use this function in multiple widget instances:

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

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

Here, you recognize a pattern: the same function is being called to create child widgets for different parent widgets. This could lead to duplicated code if you decide to structure both the Column and Row as separate widgets. Conversely, maintaining the function can sidestep best practices and lead to potential performance issues.

The Solution

Create a Custom Widget

A cleaner approach involves encapsulating your widget-building logic in a reusable custom widget. This allows you to generate the desired widgets without writing duplicate code.

Step 1: Define Your Custom Widget

Let’s create a widget called MyCustomView. This widget accepts a parameter to specify whether it should return a Row or a Column. Here’s what the implementation looks like:

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

Step 2: Utilize Your Custom Widget

Instead of calling the function directly, instantiate MyCustomView with the desired type:

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

This setup allows you to create a versatile UI while adhering to best practices. The MyCustomView widget handles the logic of differentiating between a Row and a Column, keeping your code clean and maintainable.

Benefits of This Approach

Code Reusability: You avoid duplication by encapsulating your list and its generation logic within a custom widget.

Maintainability: If you need to change how the widget list is built, you only need to modify it in one place.

Performance Efficiency: Custom widgets can offer better performance since they leverage Flutter’s rendering mechanisms.

Conclusion

Avoiding duplicate code in Flutter doesn’t have to be a daunting task. By creating a custom widget that handles multiple types of layouts, you can streamline your code, maintain best practices, and enhance your application’s performance. This technique can empower you to build more efficient Flutter applications without bogging down your codebase with repetition.

Whether you’re building complex UIs or simple components, remember the power of encapsulation in widget design. Happy coding!