class Example extends Component {

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

  scrollOnFocus = inputName => () => {
    this.scroll.inputFocused(
      findNodeHandle(this[inputName]),
    );
  }

  render() {
    return (
      <ScrollViewSmart
        ref={e => (this.scroll = e)}
      >
        <TextInput
          ref={e => (this.input = e)}
          onFocus={this.scrollOnFocus('input')}
        />
        // ...
      </ScrollViewSmart>
    );
  }
}