react-native-snap-carousel doesn't render properly

Question

Summary of Problem

I'm using react-native-snap-carousel and it's not rendering properly. It only renders after being swiped and I need to it render when the screen initially renders. When I have the screen assigned to the initial route of my BottomTabNavigator or the initial route in my Stack Navigator in React Navigation, then the carousel renders perfectly. When I assign the exact same screen to any other route in a Stack Navigator, then it doesn't render the carousel until I swipe it.

I need to use the screen with the carousel as the second route in my Stack Navigator and I can't figure out how to make it work properly.

What I've tried

1. I've tried taking everything else out of the screen
2. I've also tried creating a new screen from scratch.
3. I've tested the screen as the initial route in the Stack Navigator and it works perfectly but I still can't get the carousel to render when the screen loads.
4. I've also tried switching to a class based react component and that hasn't helped.

Code

Component with Carousel

import React, { useState } from "react";
import { View, Text } from "react-native";
import { useDispatch } from "react-redux";
import styles from "./StatSelectorStartComp.style";
import HeaderText from "~/app/Components/HeaderText/HeaderText";
import Carousel from "react-native-snap-carousel";
import LargeButton from "~/app/Components/Buttons/LargeButton/LargeButton";
import NavigationService from "~/app/services/NavigationService";
import { saveStartCompStatCategory } from "~/app/Redux/actions/dailyCompActions";

const StatSelectorStartComp = ({}) => {
  const dispatch = useDispatch();
  const ENTRIES1 = ["Kills", "Wins", "K/D", "Win %"];
  const [selectedStat, setSelectedStat] = useState(ENTRIES1[0]);

  const _renderItem = ({ item, index }) => {
    return (
      <View style={styles.slide}>
        <Text style={styles.compSelectStatCarousel}>{item}</Text>
      </View>
    );
  };

  return (
    <View style={styles.container}>
      <View style={styles.headerTextView}>
        <HeaderText header={"Configure Competition"} />
      </View>
      <Text style={styles.h5Secondary}> Which stat will you track?</Text>
      <View style={styles.selectStatView}>
        <Text style={styles.mediumGreyedOut}>Most {selectedStat} Wins</Text>
        <Carousel
          ref={c => {
            _carousel = c;
          }}
          data={ENTRIES1}
          renderItem={_renderItem}
          sliderWidth={375}
          itemWidth={100}
          onSnapToItem={index => {
            setSelectedStat(ENTRIES1[index]);
          }}
        />
      </View>
      <View style={styles.buttonView}>
        <LargeButton
          onPress={() => {
            dispatch(saveStartCompStatCategory(selectedStat));
            NavigationService.navigate("CompAddFriends");
          }}
          buttonText="Add Friends"
        />
      </View>
    </View>
  );
};

export default StatSelectorStartComp;

Styles for Component with Carousel

import { StyleSheet } from "react-native";
import { backgroundColor } from "~/app/Constants";
import {
  h5Secondary,
  mediumGreyedOut,
  compSelectStatCarousel
} from "~/app/FontConstants";

export default StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: "space-between",
    backgroundColor
  },
  headerTextView: {
    flex: 1
  },
  h5Secondary,
  selectStatView: {
    flex: 3
  },
  mediumGreyedOut,
  compSelectStatCarousel,
  buttonView: {
    flex: 2
  }
});

React Navigation Configuration

const StartCompStack = createStackNavigator({
  StartFriendsComp: {
    screen: StartFriendsComp
  },
  StatSelectorStartComp: {
    screen: CarouselTest
  },
  CompAddFriends: {
    screen: CompAddFriends
  },
  FinalCompScreen: {
    screen: FinalCompScreen
  }
});

const ProfileStack = createStackNavigator({
  Profile: {
    screen: ProfileScreen
  },
  Settings: {
    screen: SettingsScreen
  }
});

const BottomTabNav = createBottomTabNavigator(
  {
    Home: {
      screen: HomeScreen
    },
    Competitions: {
      screen: Competitions
    },
    StartComp: {
      screen: StartCompStack,
      navigationOptions: () => ({
        tabBarVisible: false
      })
    },
    CompScreen: {
      screen: CompScreen
    },
    Friends: {
      screen: FriendsDrawer
    },
    Profile: {
      screen: ProfileStack
    },
    FacebookFriendsList
  },
  {
    tabBarComponent: CustomTabNav,
    initialRouteName: "Home" 
  }
);

Pictures outlining the problem

When screen loads, carousel not rendered

After swiping on carousel

Answer 1

The same problem was coming on our project and a little trick help us . We have set default loading state to true and in componentDidMount set state to false to show Carousel

Try this , it may help you

state = { loading: true };

  componentDidMount() {
    setTimeout(() => {
      this.setState({ loading: false });
    }, 10);
  }
  render() {
    if(this.state.loading) {
      return null;
    }

    // return component render which contain Carousel
    ......... 
  }