Animated header ScrollView

IN DEVELOPMENT.

Built on <Animated> using useNativeDriver=true, runs on 60fps, so it's very smooth, comparing to regular Animated. Works, but has funky boilerplate (I'm working on it). Check out the example (gif is only 25fps).

Props:

Prop name	Description
headerChildren	contents placed into the header
rootChildren	contents placed below the header (suitable for some buttons)
onScroll()	integrated ScrollView onScroll() callback
headerMaxHeight	as name says
headerMinHeight	as name says
rootChildrenHeight	as name says

Basic example

import AnimatedHeaderScrollView from 'react-native-animated-header-scroll-view'

//
// your component code here
//

render() {
    let headerChildren = <Text>Hello, World!</Text>;
    
    return (<AnimatedHeaderScrollView headerChildren={headerChildren}>
        // your list contents here
    </AnimatedHeaderScrollView>)

Extended example

Just to show all functionaliy. Much rubbish code here, sorry. I'll update it later.

import React from 'react';
import {Animated, StyleSheet, View} from 'react-native';

import * as styles from "../@styles";
import * as colors from "../tools/colors";
import AnimatedHeaderScrollView from 'react-native-animated-header-scroll-view'
import DwText from "../comp/DwText";
import Icon from "react-native-vector-icons/Ionicons";
import CircleButton from "../comp/CircleButton";
import Avatar from "../comp/Avatar";


const arr = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13];

export default class Profile extends React.Component {

    data = {};
    state = {
        controlsOpacity: 1,
        headerX: 20,
        headerY: 20,
    };

    constructor(props) {
        super(props);
    }

    getScroll(elem) {
        if (this.data.scroll || !elem) return;
        let conf = elem.getConfig();
        let scroll = elem.getScroll();
        this.data.scroll = scroll;

        this.setState({
            controlsOpacity: scroll.interpolate({
                inputRange: [0, conf.headerScrollDistance],
                outputRange: [1, 0],
                extrapolate: 'clamp',
            }),
            headerX: scroll.interpolate({
                inputRange: [0, conf.headerScrollDistance],
                outputRange: [20, 60],
                extrapolate: 'clamp',
            }),
            headerY: scroll.interpolate({
                inputRange: [0, conf.headerScrollDistance],
                outputRange: [80, 5],
                extrapolate: 'clamp',
            }),
        });
    }

    render() {
        let headerChildren = <Animated.View style={[_styles.header, {
            transform: [{translateX: this.state.headerX}, {translateY: this.state.headerY}]
        }]}>
            <Avatar size={50} name='Lol Prudnikov' style={_styles.avatar}/>
            <View>
                <DwText style={_styles.white}>Lol Prudnikov</DwText>
                <DwText style={[_styles.hintText, _styles.white]}>kek barakek</DwText>
            </View>
        </Animated.View>;
                
        let rootChildren = <Animated.View style={[
            _styles.headerControls,
            {opacity: this.state.controlsOpacity}
        ]}>
            <CircleButton>
                <Icon name="md-create"/>
            </CircleButton>
        </Animated.View>;

        return (<AnimatedHeaderScrollView
            style={_styles.container}
            ref={elem => this.getScroll(elem)}
            headerChildren={headerChildren}
            rootChildren={rootChildren}
        >
            <View style={_styles.section}>
                <DwText style={_styles.sectionLabel}>
                    Registration page
                </DwText>
                {arr.map(num =>
                    <View key={num} style={_styles.formGroup}>
                        <DwText>Some button</DwText>
                        <DwText style={[_styles.hintText]}>
                            enter some data about yourself
                        </DwText>
                    </View>
                )}
            </View>
        </AnimatedHeaderScrollView>);
    }
}

const _styles = StyleSheet.create({
    container: styles.container,
    section: styles.section,
    sectionLabel: styles.sectionLabel,
    formGroup: styles.formGroup,
    hintText: styles.hintText,
    headerControls: {
        ...styles.spacing('px'),
        alignItems: 'flex-end',
    },
    header: {
        flexDirection: 'row',
    },
    avatar: {
        ...styles.spacing('mr'),
    },
    white: {
        color: colors.Light,
    },
});