#StackBounty: #react-native #flexbox #scrollview #padding #react-native-flatlist React native Flatlist does not scroll inside the custo…

Bounty: 200

I have created one custom Animated bottom sheet. User can move the bottom sheet scroll up and down. Inside my bottom sheet, I have used flatList where I fetched the data and render the items as a card. Up-till now everything works as expected but I had an issue Flatlist scrolling. Inside the bottom sheet the Flat-list does not scroll. I have made hard coded height value 2000px, which is really practice and also FlatList’s contentContainerStyle added hard coded paddingBottom 2000(also another bad practice). I want to scroll the FlatList based on Flex-box. I don’t know how to fix this issue.

I share my code on expo-snacks

This is my all code

import React, { useState, useEffect } from "react";
import {
  StyleSheet,
  Text,
  View,
  Dimensions,
  useWindowDimensions,
  SafeAreaView,
  RefreshControl,
  Animated,
  Button,
  FlatList,
} from "react-native";

import MapView from "react-native-maps";
import styled from "styled-components";

import {
  PanGestureHandler,
  PanGestureHandlerGestureEvent,
  TouchableOpacity,
} from "react-native-gesture-handler";

const { width } = Dimensions.get("screen");

const initialRegion = {
  latitudeDelta: 15,
  longitudeDelta: 15,
  latitude: 60.1098678,
  longitude: 24.7385084,
};

const api =
  "http://open-api.myhelsinki.fi/v1/events/?distance_filter=60.1699%2C24.9384%2C10&language_filter=en&limit=50";

export default function App() {
  const { height } = useWindowDimensions();
  const [translateY] = useState(new Animated.Value(0));

  const [event, setEvent] = useState([]);
  const [loading, setLoading] = useState(false);

  // This is Fetch Dtata
  const fetchData = async () => {
    try {
      setLoading(true);
      const response = await fetch(api);
      const data = await response.json();

      setEvent(data.data);
      setLoading(false);
    } catch (error) {
      console.log("erro", error);
    }
  };
  useEffect(() => {
    fetchData();
  }, []);

  // Animation logic
  const bringUpActionSheet = () => {
    Animated.timing(translateY, {
      toValue: 0,
      duration: 500,
      useNativeDriver: true,
    }).start();
  };

  const closeDownBottomSheet = () => {
    Animated.timing(translateY, {
      toValue: 1,
      duration: 500,
      useNativeDriver: true,
    }).start();
  };

  const bottomSheetIntropolate = translateY.interpolate({
    inputRange: [0, 1],
    outputRange: [-height / 2.4 + 50, 0],
  });

  const animatedStyle = {
    transform: [
      {
        translateY: bottomSheetIntropolate,
      },
    ],
  };

  const gestureHandler = (e: PanGestureHandlerGestureEvent) => {
    if (e.nativeEvent.translationY > 0) {
      closeDownBottomSheet();
    } else if (e.nativeEvent.translationY < 0) {
      bringUpActionSheet();
    }
  };

  return (
    <>
      <MapView style={styles.mapStyle} initialRegion={initialRegion} />
      <PanGestureHandler onGestureEvent={gestureHandler}>
        <Animated.View
          style={[styles.container, { top: height * 0.7 }, animatedStyle]}
        >
          <SafeAreaView style={styles.wrapper}>
            <ContentConatiner>
              <Title>I am scroll sheet</Title>
              <HeroFlatList
                data={event}
                refreshControl={
                  <RefreshControl
                    enabled={true}
                    refreshing={loading}
                    onRefresh={fetchData}
                  />
                }
                keyExtractor={(_, index) => index.toString()}
                renderItem={({ item, index }) => {
                  const image = item?.description.images.map((img) => img.url);
                  const startDate = item?.event_dates?.starting_day;

                  return (
                    <EventContainer key={index}>
                      <EventImage
                        source={{
                          uri:
                            image[0] ||
                            "https://res.cloudinary.com/drewzxzgc/image/upload/v1631085536/zma1beozwbdc8zqwfhdu.jpg",
                        }}
                      />
                      <DescriptionContainer>
                        <Title ellipsizeMode="tail" numberOfLines={1}>
                          {item?.name?.en}
                        </Title>
                        <DescriptionText>
                          {item?.description?.intro ||
                            "No description available"}
                        </DescriptionText>
                        <DateText>{startDate}</DateText>
                      </DescriptionContainer>
                    </EventContainer>
                  );
                }}
              />
            </ContentConatiner>
          </SafeAreaView>
        </Animated.View>
      </PanGestureHandler>
    </>
  );
}

const styles = StyleSheet.create({
  container: {
    position: "absolute",
    top: 0,
    left: 0,
    right: 0,
    backgroundColor: "white",
    shadowColor: "black",
    shadowOffset: {
      height: -6,
      width: 0,
    },
    shadowOpacity: 0.1,
    shadowRadius: 5,
    borderTopEndRadius: 15,
    borderTopLeftRadius: 15,
  },
  mapStyle: {
    width: width,
    height: 800,
  },
});

const HeroFlatList = styled(FlatList).attrs({
  contentContainerStyle: {
    padding: 14,
    flexGrow: 1, // IT DOES NOT GROW
    paddingBottom: 2000, // BAD PRACTICE
  },
   height: 2000 /// BAD PRACTICE
})``; 


const ContentConatiner = styled.View`
  flex: 1;
  padding: 20px;
  background-color: #fff;
`;
const Title = styled.Text`
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 5px;
`;

const DescriptionText = styled(Title)`
  font-size: 14px;
  opacity: 0.7;
`;

const DateText = styled(Title)`
  font-size: 14px;
  opacity: 0.8;
  color: #0099cc;
`;

const EventImage = styled.Image`
  width: 70px;
  height: 70px;
  border-radius: 70px;
  margin-right: 20px;
`;

const DescriptionContainer = styled.View`
  width: 200px;
`;

const EventContainer = styled(Animated.View)`
  flex-direction: row;
  padding: 20px;
  margin-bottom: 10px;
  border-radius: 20px;
  background-color: rgba(255, 255, 255, 0.8);
  shadow-color: #000;
  shadow-opacity: 0.3;
  shadow-radius: 20px;
  shadow-offset: 0 10px;
`;


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