Hacky way to scroll form on keyboard show.

component.js

componentWillUnmount() {
  registerScrollViewForm.unregister(this.scrollviewForm);
}

_setFormScrollView(scrollView) {
    this.scrollview = scrollviewForm;
    registerScrollViewForm.register(scrollView);
}

render() {
  return (
    <ScrollView
        contentContainerStyle={ styles.form }
        ref={ this._setFormScrollView.bind(this) }
        showsVerticalScrollIndicator
    >
      <MyForm...></MyForm>
  );
}

registerScrollViewForm.js

import {
    DeviceEventEmitter,
    Platform,
    TextInput
} from "react-native";
import { UIManager } from "NativeModules";

let _scrollViews = [];

function _keyboardWillShow(e) {
    console.log('keyboard will show', e); //eslint-disable-line
    let currentScrollview = _scrollViews.filter(s=>s.refs)[0];
    if (!currentScrollview || !currentScrollview.refs.InnerScrollView) {
        return;
    }
    console.log('scrollview found'); //eslint-disable-line
    let currentTextInput = TextInput.State.currentlyFocusedField();
    if (currentTextInput < 1) {
        return;
    }
    console.log('text input found'); //eslint-disable-line
    UIManager.measure(currentTextInput, (frameX, frameY, frameWidth, frameHeight, pageX, pageY) => { //eslint-disable-line
        console.log("text input measure", frameX, frameY, frameWidth, frameHeight, pageX, pageY); //eslint-disable-line
        if (pageY + frameHeight > e.endCoordinates.screenY) {
            //the text input is being hidden by the keyboard.
            currentScrollview.refs.InnerScrollView.measure((x, y, w, h, scrollPageX, scrollPageY)=> { //eslint-disable-line
                console.log("scrollView measure", x, y, w, h, scrollPageX, scrollPageY); // eslint-disable-line
                let relativeY = pageY - scrollPageY;
                console.log("scrolling to:", relativeY - 30); //eslint-disable-line
                currentScrollview.scrollTo(relativeY - 30);
            });
        }
        else {
            console.log('text input is not being hidden by the keyboard'); //eslint-disable-line
        }
    });
}

DeviceEventEmitter.addListener(Platform.OS === "IOS" ? "keyboardWillShow" : "keyboardDidShow", _keyboardWillShow);

function register(scrollView) {
    if (scrollView === null) {
        console.log("trying to register a null scrollView"); //eslint-disable-line
        return;
    }
    _scrollViews.push(scrollView);
}

function unregister(scrollView) {
    let index = _scrollViews.indexOf(scrollView);
    if (index > -1) {
        _scrollViews.splice(index, 1);
    }
}

export default {
    register,
    unregister
};