TabNavigator reference

TabNavigator(RouteConfigs, TabNavigatorConfig);

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 StackNavigator.

TabNavigatorConfig

• tabBarComponent - Component to use as the tab bar, e.g. TabBarBottom (this is the default on iOS), TabBarTop (this is the default on Android).
• tabBarPosition - Position of the tab bar, can be 'top' or 'bottom'.
• swipeEnabled - Whether to allow swiping between tabs.
• animationEnabled - Whether to animate when changing tabs.
• lazy - Defaults to true. If false, all tabs are rendered immediately. When true, tabs are rendered only when they are made active.
• removeClippedSubviews - Defaults to true. An optimization to reduce memory usage by freeing resources used by inactive tabs.
• configureTransition - a function that, given currentTransitionProps and nextTransitionProps, returns a configuration object that describes the animation between tabs.
• initialLayout - Optional object containing the initial height and width, can be passed to prevent the one frame delay in react-native-tab-view rendering.
• tabBarOptions - Configure the tab bar, see below.

Several options get passed to the underlying router to modify navigation logic:

• 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.

tabBarOptions for TabBarBottom (default tab bar on iOS)

• 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.
• 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.

Example:

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

tabBarOptions for TabBarTop (default tab bar on Android)

• activeTintColor - Label and icon color of the active tab.
• inactiveTintColor - Label and icon color of the inactive tab.
• showIcon - Whether to show icon for tab, default is false.
• showLabel - Whether to show label for tab, default is true.
• upperCaseLabel - Whether to make label uppercase, default is true.
• pressColor - Color for material ripple (Android >= 5.0 only).
• pressOpacity - Opacity for pressed tab (iOS and Android < 5.0 only).
• scrollEnabled - Whether to enable scrollable tabs.
• tabStyle - Style object for the tab.
• indicatorStyle - Style object for the tab indicator (line at the bottom of the tab).
• labelStyle - Style object for the tab label.
• iconStyle - Style object for the tab icon.
• style - Style object for the tab bar.
• allowFontScaling - Whether label font should scale to respect Text Size accessibility settings, default is true.

Example:

tabBarOptions: {
  labelStyle: {
    fontSize: 12,
  },
  tabStyle: {
    width: 100,
  },
  style: {
    backgroundColor: 'blue',
  },
}

navigationOptions used by TabNavigator

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.

swipeEnabled

True or false to enable or disable swiping between tabs, if not set then defaults to TabNavigatorConfig option swipeEnabled.

tabBarIcon

React Element or a function that given { focused: boolean, tintColor: string } returns a React.Node, to display in tab bar.

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.

tabBarOnPress

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

• the previousScene: { route, index } which is the scene we are leaving
• the scene: { route, index } that was tapped
• the jumpToIndex method that can perform the navigation for you

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

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

Navigator props

The navigator component created by TabNavigator(...) takes the following props:

• screenProps - Pass down extra options to child screens and navigation options, for example:

const TabNav = TabNavigator({
  // config
});

<TabNav
  screenProps={/* this prop will get passed to the screen components as this.props.screenProps */}
/>