createBottomTabNavigator

A simple tab bar on the bottom of the screen that lets you switch between different routes. Routes are lazily initialized -- their screen components are not mounted until they are first focused.

createBottomTabNavigator(RouteConfigs, BottomTabNavigatorConfig);

RouteConfigs

The route configs object is a mapping from route name to a route config, which tells the navigator what to present for that route, see example from stack navigator.

BottomTabNavigatorConfig

• initialRouteName - The routeName for the initial tab route when first loading.
• order - Array of routeNames which defines the order of the tabs.
• paths - Provide a mapping of routeName to path config, which overrides the paths set in the routeConfigs.
• backBehavior - Should the back button cause a tab switch to the initial tab? If yes, set to initialRoute, otherwise none. Defaults to initialRoute behavior.
• tabBarComponent - Optional, override component to use as the tab bar.
• tabBarOptions - An object with the following properties:
  • activeTintColor - Label and icon color of the active tab.
  • activeBackgroundColor - Background color of the active tab.
  • inactiveTintColor - Label and icon color of the inactive tab.
  • inactiveBackgroundColor - Background color of the inactive tab.
  • showLabel - Whether to show label for tab, default is true.
  • showIcon - Whether to show icon for tab, default is true.
  • style - Style object for the tab bar.
  • labelStyle - Style object for the tab label.
  • tabStyle - Style object for the tab.
  • allowFontScaling - Whether label font should scale to respect Text Size accessibility settings, default is true.
  • adaptive - Should the tab icons and labels alignment change based on screen size? Defaults to true for iOS 11. If false, tab icons and labels align vertically all the time. When true, tab icons and labels align horizontally on tablet.
  • safeAreaInset - Override the forceInset prop for <SafeAreaView>. Defaults to { bottom: 'always', top: 'never' }. Available keys are top | bottom | left | right provided with the values 'always' | 'never'.

Example:

tabBarOptions: {
  activeTintColor: '#e91e63',
  labelStyle: {
    fontSize: 12,
  },
  style: {
    backgroundColor: 'blue',
  },
}

If you want to customize the tabBarComponent:

import { createBottomTabNavigator, BottomTabBar } from 'react-navigation-tabs';

const TabBarComponent = (props) => <BottomTabBar {...props} />;

const TabScreens = createBottomTabNavigator({
  tabBarComponent: (props) => (
    <TabBarComponent {...props} style={{ borderTopColor: '#605F60' }} />
  ),
});

navigationOptions for screens inside of the navigator

title

Generic title that can be used as a fallback for headerTitle and tabBarLabel.

tabBarVisible

true or false to show or hide the tab bar, if not set then defaults to true.

tabBarIcon

React Element or a function that given { focused: boolean, horizontal: boolean, tintColor: string } returns a React.Node, to display in the tab bar. horizontal is true when the device is in landscape and false when portrait. The icon is re-rendered whenever the device orientation changes.

tabBarLabel

Title string of a tab displayed in the tab bar or React Element or a function that given { focused: boolean, tintColor: string } returns a React.Node, to display in tab bar. When undefined, scene title is used. To hide, see tabBarOptions.showLabel in the previous section.

tabBarButtonComponent

React Component that wraps the icon and label and implements onPress. The default is a wrapper around TouchableWithoutFeedback that makes it behave the same as other touchables. tabBarButtonComponent: TouchableOpacity would use TouchableOpacity instead.

tabBarAccessibilityLabel

Accessibility label for the tab button. This is read by the screen reader when the user taps the tab. It's recommended to set this if you don't have a label for the tab.

tabBarTestID

ID to locate this tab button in tests.

tabBarOnPress

Callback to handle press events; the argument is an object containing:

• navigation: navigation prop for the screen
• defaultHandler: the default handler for tab press

Useful for adding a custom logic before the transition to the next scene (the tapped one) starts.

Define this callback without ever invoking defaultHandler to prevent any navigation from occurring.