react-native-scrollable-tab-view

This is probably my favorite navigation pattern on Android, I wish it were more common on iOS! This is a very simple JavaScript-only implementation of it for React Native. For more information about how the animations behind this work, check out the Rebound section of the React Native Animation Guide

Add it to your project

1. Run npm install react-native-scrollable-tab-view --save
2. import ScrollableTabView from 'react-native-scrollable-tab-view';

Examples

Examples are available on https://snack.expo.io/@ptomasroos/react-native-scrollable-tab-view-examples

Basic usage

import ScrollableTabView from 'react-native-scrollable-tab-view';

class App extends React.Component {
  render() {
    return (
      <ScrollableTabView>
        <ReactPage tabLabel="React" />
        <FlowPage tabLabel="Flow" />
        <JestPage tabLabel="Jest" />
      </ScrollableTabView>
    );
  }
}

Injecting a custom tab bar

Suppose we might want to have a custom tab bar, in this example called CustomTabBar, we would inject it into our ScrollableTabView like this:

import ScrollableTabView from 'react-native-scrollable-tab-view';
import CustomTabBar from './CustomTabBar';

class App extends React.Component {
  render() {
    return (
      <ScrollableTabView renderTabBar={() => <CustomTabBar someProp={'here'} />}>
        <ReactPage tabLabel="React" />
        <FlowPage tabLabel="Flow" />
        <JestPage tabLabel="Jest" />
      </ScrollableTabView>
    );
  }
}

To start implementing your own custom CustomTabBar like example above, you can start with the DefaultTabBar and make your modifications locally.

## Props

- **`renderTabBar`** _(Function:ReactComponent)_ - accept 1 argument `props` and should return a component to use as
  the tab bar. The component has `goToPage`, `tabs`, `activeTab` and
  `ref` added to the props, and should implement `setAnimationValue` to
  be able to animate itself along with the tab content. You can manually pass the `props` to the TabBar component.
- **`tabBarPosition`** _(String)_ Defaults to `"top"`.
  - `"bottom"` to position the tab bar below content.
  - `"overlayTop"` or `"overlayBottom"` for a semitransparent tab bar that overlays content. Custom tab bars must consume a style prop on their outer element to support this feature: `style={this.props.style}`.
- **`onChangeTab`** _(Function)_ - function to call when tab changes, should accept 1 argument which is an Object containing two keys: `i`: the index of the tab that is selected, `ref`: the ref of the tab that is selected
- **`onScroll`** _(Function)_ - function to call when the pages are sliding, should accept 1 argument which is an Float number representing the page position in the slide frame.
- **`locked`** _(Bool)_ - disables horizontal dragging to scroll between tabs, default is false.
- **`initialPage`** _(Integer)_ - the index of the initially selected tab, defaults to 0 === first tab.
- **`page`** _(Integer)_ - set selected tab
- **`children`** _(ReactComponents)_ - each top-level child component should have a `tabLabel` prop that can be used by the tab bar component to render out the labels. The default tab bar expects it to be a string, but you can use anything you want if you make a custom tab bar.
- **`tabBarUnderlineStyle`** _([ViewPropTypes](https://facebook.github.io/react-native/docs/view.html#style))_ - style of the default tab bar's underline.
- **`tabBarBackgroundColor`** _(String)_ - color of the default tab bar's background, defaults to `white`
- **`tabBarActiveTextColor`** _(String)_ - color of the default tab bar's text when active, defaults to `navy`
- **`tabBarInactiveTextColor`** _(String)_ - color of the default tab bar's text when inactive, defaults to `black`
- **`tabBarTextStyle`** _(Object)_ - Additional styles to the tab bar's text. Example: `{fontFamily: 'Roboto', fontSize: 15}`
- **`style`** _([ViewPropTypes](https://facebook.github.io/react-native/docs/view.html#style))_
- **`contentProps`** _(Object)_ - props that are applied to root `ScrollView`/`ViewPagerAndroid`. Note that overriding defaults set by the library may break functionality; see the source for details.
- **`scrollWithoutAnimation`** _(Bool)_ - on tab press change tab without animation.
- **`prerenderingSiblingsNumber`** _(Integer)_ - pre-render nearby # sibling, `Infinity` === render all the siblings, default to 0 === render current page.

**MIT Licensed**