persistent_bottom_nav_bar

A persistent bottom navigation bar for Flutter.

Styles

Neumorphic

Style1

Style3

Style5

Style6

Style7

Style8

Neumorphic without subtitle

Note: These doesn't include all style variations.

Features

• Highly customizable persistent bottom navigation bar.
• Ability to push new screens with or without bottom navigation bar.
• Includes platform specific behavior as an option (specify it in the two navigator functions).
• 12 styles for the bottom navigation bar (includes BottomNavyBar and Neumorphic style).
• Includes functions for pushing screen with or without the bottom navigation bar i.e. pushNewScreen() and pushNewScreenWithRouteSettings().
• Based on flutter's Cupertino(iOS) bottom navigation bar.
• Can be translucent for a particular tab.

Getting Started

In your flutter project add the dependency:

dependencies:
  persistent_bottom_nav_bar: any

Persistent bottom navigation bar uses PersistentTabController as its controller. Here is how to declare it:

PersistentTabController _controller;

_controller = PersistentTabController(initialIndex: 0);

The main widget then to be declared is PersistenTabView. NOTE: This widget includes SCAFFOLD (based on CupertinoTabScaffold), so no need to declare it. Following is an example for demonstration purposes:

class MyApp extends StatelessWidget {
  const MyApp({Key key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return PersistentTabView(
      controller: _controller,
      items: _navBarsItems(),
      screens: _buildScreens(),
      showElevation: true,
      navBarCurve: NavBarCurve.upperCorners,
      iconSize: 26.0,
      navBarStyle: NavBarStyle.style1, // Choose the nav bar style with this property
      onItemSelected: (index) {
        print(index);
      },
    );
  }
}

    List<Widget> _buildScreens() {
        return [
        HomeScreen(),
        SettingsScreen()
        ];
    }

    List<PersistentBottomNavBarItem> _navBarsItems() {
        return [
        PersistentBottomNavBarItem(
            icon: Icon(CupertinoIcons.home),
            title: ("Home"),
            activeColor: CupertinoColors.activeBlue,
            inactiveColor: CupertinoColors.systemGrey,
        ),
        PersistentBottomNavBarItem(
            icon: Icon(CupertinoIcons.settings),
            title: ("Settings"),
            activeColor: CupertinoColors.activeBlue,
            inactiveColor: CupertinoColors.systemGrey,
        ),
        ];
    }

To push a new screen, use the following functions to control the visibility of bottom navigation bar on a particular screen. Additionally, platform specific behavior can be enabled or disabled from here (disabled by default).

If platform specific is enabled while pushing a new screen, on Android it will push the screen WITHOUT the bottom navigation bar but on iOS it will persist the bottom navigation bar. This is the default behavior specified by each platform.

    pushNewScreen(
        context,
        screen: HomeScreen(),
        platformSpecific: false, // OPTIONAL VALUE. False by default, which means the bottom nav bar will persist
        withNavBar: true, // OPTIONAL VALUE. True by default.
    );

    pushNewScreenWithRouteSettings(
        context,
        settings: RouteSettings(name: HomeScreen.routeName),
        screen: HomeScreen(),
        platformSpecific: false,
        withNavBar: true,
    );

If you are pushing a new modal screen, use the following function:

    pushDynamicScreen(
        context,
        screen: HomeModalScreen(),
        platformSpecific: false,
        withNavBar: true,
    );

For better understanding, refer to the example project in the official git repo.