Скачать или смотреть Navigating Inside NavigationBody with Fluent UI in Flutter

Discover how to efficiently navigate within the `NavigationBody` of a `NavigationView` using the `fluent_ui` package in Flutter. Explore the solution with code examples!
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Mastering Navigation Inside NavigationBody with Fluent UI in Flutter

When developing applications with Flutter, managing navigation can often be a challenge, especially when it comes to navigating within nested structures like a NavigationView. A common scenario arises when you want to transition between pages within a NavigationBody, yet retain the state of the NavigationPane. This guide delves into an effective solution to this problem using the fluent_ui package.

Problem Statement

You're working on a Flutter Windows application utilizing the fluent_ui package. You have constructed a NavigationView that comprises a NavigationPane and a NavigationBody. The issue at hand is that when you navigate from one body item (e.g., app/cars/) to another (e.g., app/cars/id), you want to maintain the state of the NavigationPane while only updating the content of the NavigationBody. This can be tricky, and it raises the question: How can you achieve this without affecting the entire window state?

Solution Overview

The solution involves leveraging the Navigator as a base widget within your NavigationBody. By doing this, you can manage the navigation internally through the Navigator widget, ensuring that only the NavigationBody content changes when navigating. Here’s how you can implement this in your Flutter application:

Step-by-Step Implementation

Create a Navigation View: Wrap your NavigationBody with a Navigator that handles the navigation logic.

Define the Navigator Class: Create a custom class for your navigator that defines the routing logic.

Use Navigator Methods: Utilize pushNamed() (or other Navigator methods) to perform navigation between pages within the nested structure.

Example Code

Let's break down the code to illustrate this solution.

1. NavigationView Setup

In your nav_view_page.dart, set up the NavigationView as follows:

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

2. Custom Navigator Implementation

Create a separate file custom_navigator.dart with the following code for your custom navigator:

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

3. Navigating Between Pages

To navigate between pages within your inner Navigator, use the pushNamed method like so:

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

Conclusion

Implementing navigation inside a NavigationBody using Fluent UI in Flutter can significantly streamline your user experience without disrupting the overall application state. By utilizing a custom Navigator, you can easily manage page transitions while keeping the NavigationPane intact.

This approach not only promotes cleanliness in your code but also enhances the maintainability of your application. Now, you can focus on building your app's features instead of getting bogged down by complex navigation issues. Happy coding!