Building an intuitive user interface is key to enhancing user experience in mobile applications. With the Fancy Bottom Navigation plugin, you can easily add a chic navigation bar to your Flutter app. This article will guide you through the process of implementing the Fancy Bottom Navigation while troubleshooting common issues that may arise.

Getting Started

To kick things off, you need to add the Fancy Bottom Navigation plugin to your project. Although the package will soon be available via pub, you can still set your YAML file as follows:

dependencies:
  fancy_bottom_navigation: ^0.3.2

Make sure to run flutter pub get afterwards to fetch the package and include it in your project.

Limitations

Currently, the Fancy Bottom Navigation is designed to support between 2 and 4 tabs. Thus, it’s crucial to ensure you stay within this specified range when implementing it.

Basic Usage

Integrating the Fancy Bottom Navigation into your UI is simple. Here’s how you can do it:

bottomNavigationBar: FancyBottomNavigation(
    tabs: [
        TabData(iconData: Icons.home, title: 'Home'),
        TabData(iconData: Icons.search, title: 'Search'),
        TabData(iconData: Icons.shopping_cart, title: 'Basket')
    ],
    onTabChangedListener: (position) {
        setState(() {
            currentPage = position;
        });
    },
)

In this snippet, you are creating a bottom navigation bar featuring **three tabs**: Home, Search, and Basket. The onTabChangedListener helps keep track of which tab is currently active by setting the state for the current page.

Understanding TabData

Think of TabData as items on a menu that you can choose from, where each menu item has its own attributes:

• iconData – This is the visual representation of the tab, like a delicious burger icon for the “Home” tab.
• title – This is the name of the tab, which tells users what they can expect when they click it.
• onClick – This is an optional action triggered when the active tab itself is clicked.

Attributes

The Fancy Bottom Navigation widget comes equipped with several attributes:

• required:
  • tabs: A list of TabData objects that define your tabs.
  • onTabChangedListener: A function to handle tab taps and to capture the position of the selected tab.
• optional:
  • initialSelection: Defaults to 0.
  • circleColor: Controls the circle color; defaults to null and derives from your current theme.
  • activeIconColor: Defines the icon color when active.
  • inactiveIconColor: Defines the icon color when inactive.
  • textColor, barBackgroundColor, key: Other customization options that derive from your theme.

Theming

The navigation bar will automatically align with your current theme. However, you can also customize its appearance using the various attributes provided. Here’s an example of how a themed navigation bar might look:

Programmatic Selection

To switch tabs programmatically, start by assigning a GlobalKey to your FancyBottomNavigation widget. Whenever you want to change the tab, access the widget’s state using this key and call setPage(position). You can refer to the example project in main.dart for precise implementation. Look for line 75 for context.

Showcase

If you are using this package in a live app, feel free to reach out to share your experience! We’d love to highlight your application in our community.

Troubleshooting

Should you encounter any hiccups while implementing the Fancy Bottom Navigation, consider the following troubleshooting strategies:

• Ensure that your Flutter SDK is updated to the latest version.
• Verify that the number of tabs in your navigation bar is between 2 and 4.
• Check for typographical errors in your code; sometimes a small mistake can lead to big problems.
• Examine your state management implementation, especially how you manage the current page state.

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