如何在react原生中更新/重新呈现导航器右按钮？

import { createStackNavigator } from 'react-navigation';

const AppNavigator = createStackNavigator(
  {
    Home: { screen: HomeScreen },
    Details: { screen: DetailsScreen },
  },
  {
    navigationOptions: ({ navigation }) => ({
      headerRight: <CustomButton onPress={() => navigation.navigate('Details')} />,
    }),
  }
);

class DetailsScreen extends React.Component {
  static navigationOptions = ({ navigation }) => {
    const { params = {} } = navigation.state;
    return {
      headerRight: <CustomButton onPress={params.handleSave} />,
    };
  };

  componentDidMount() {
    this.props.navigation.setParams({ handleSave: this.handleSave });
  }

  handleSave = () => {
    // 处理保存操作
  };

  // ...
}