createMaterialTopTabNavigator

A material-design themed tab bar on the top of the screen that lets you switch between different routes by tapping the route or swiping horizontally. Transitions are animated by default. Screen components for each route are mounted immediately.

createMaterialTopTabNavigator(RouteConfigs, TabNavigatorConfig);

RouteConfigs

The route configs object is a mapping from route name to a route config.

TabNavigatorConfig

• 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.
• tabBarPosition - Position of the tab bar, can be 'top' or 'bottom', default is top.
• swipeEnabled - Whether to allow swiping between tabs.
• animationEnabled - Whether to animate when changing tabs.
• lazy - Defaults to false. If true, tabs are rendered only when they are made active or on peek swipe. When false, all tabs are rendered immediately.
• optimizationsEnabled - Whether to wrap scenes into <ResourceSavingScene /> to move the scene out of the screen once it's unfocused, it improves memory usage.
• initialLayout - Optional object containing the initial height and width, can be passed to prevent the one frame delay in react-native-tab-view rendering.
• tabBarComponent - Optional, override the component to use as the tab bar.
• tabBarOptions - An object with the following properties:
  • 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.
  • renderIndicator - Function which takes an object with the current route and returns a custom React Element to be used as a tab indicator.

Example:

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

navigationOptions for screens inside of the navigator

title

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

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, 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.

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.