react-native-navigation/playground/src/screens/TopTabOptionsScreen.js

const React = require('react');
const { PureComponent } = require('react');
const testIDs = require('../testIDs');
const { View, Text, Button } = require('react-native');
const { Navigation } = require('react-native-navigation');

class TopTabOptionsScreen extends PureComponent {
  static options() {
    return {
      topBar: {
        title: {
          color: 'black',
          fontSize: 16,
          fontFamily: 'HelveticaNeue-Italic'
        }
      }
    };
  }

  constructor(props) {
    super(props);
    this.onClickDynamicOptions = this.onClickDynamicOptions.bind(this);
  }

  render() {
    return (
      <View style={styles.root}>
        <Text style={styles.h1}>{this.props.text || 'Top Tab Screen'}</Text>
        <Text style={styles.footer}>{`this.props.componentId = ${this.props.componentId}`}</Text>
        <Button title='Dynamic Options' testID={testIDs.DYNAMIC_OPTIONS_BUTTON} onPress={this.onClickDynamicOptions} />
      </View>
    );
  }

  onClickDynamicOptions() {
    Navigation.mergeOptions(this.props.componentId, {
      topBar: {
        title: {
          text: 'Dynamic Title',
          color: '#00FFFF',
          fontSize: 16,
          fontFamily: 'HelveticaNeue-CondensedBold'
        },
        largeTitle: {
          visible: false,
        },
        buttonColor: 'red',
      }
    });
  }
}

const styles = {
  root: {
    flexGrow: 1,
    justifyContent: 'center',
    alignItems: 'center',
    backgroundColor: '#f5fcff'
  },
  h1: {
    fontSize: 24,
    textAlign: 'center',
    margin: 10
  },
  h2: {
    fontSize: 12,
    textAlign: 'center',
    margin: 10
  },
  footer: {
    fontSize: 10,
    color: '#888',
    marginTop: 10
  }
};

module.exports = TopTabOptionsScreen;