I want to make a bottom bar - react-native

Question

I want to make lower under the bar.But I don't know how to make. Press the lower bar to help me seyeo can get a page, I want I want to make.And I want to put the image that I want in the bottom bar Tell me what to do first I need your help I searched hard on Google, but there is no code similar to mine, so I keep getting it wrong or weird
import React, { useRef, useState, useCallback, useEffect } from 'react';
import {
View,
BackHandler,
Platform,
StyleSheet,
ActivityIndicator,
} from 'react-native';
import { WebView } from 'react-native-webview';
import { Image } from "react-native";
const DELAY_BEFORE_WEBVIEW = 10; // <--- seconds before webview load
export default function App() {
// ref
const webView = useRef();
const [canGoBack, setCanGoBack] = useState(false);
const handleBack = useCallback(() => {
if (canGoBack && webView.current) {
webView.current.goBack();
return true;
}
return false;
}, [canGoBack]);
// effects
useEffect(() => {
BackHandler.addEventListener('hardwareBackPress', handleBack);
return () => {
BackHandler.removeEventListener('hardwareBackPress', handleBack);
};
}, [handleBack]);
useEffect(() => {
setTimeout(() => {
setIsLoading(false);
}, 1000 * DELAY_BEFORE_WEBVIEW);
}, []);
// states
const [isLoading, setIsLoading] = useState(true);
return (
<View style={styles.container}>
<WebView
ref={webView}
source={{ uri: 'https://www.talesrunnerbestguild.co.kr/' }}
style={styles.webView}
onLoadProgress={(event) => setCanGoBack(event.nativeEvent.canGoBack)}
/>
{isLoading && <CenterLoader />}
</View>
);
}
const CenterLoader = () => (
<View style={styles.loaderContainer}>
<Image source={require('/workspace/talesrunner23/assets/js34.png/')}
style={{height:115,width:90}}/>
</View>
);
const styles = StyleSheet.create({
container: { flex: 1 },
loaderContainer: {
flex: 1,
justifyContent: 'center',
alignItems: 'center',
position: 'absolute',
width: '100%',
height: '100%',
backgroundColor:'white' // <-- comment this to show webview while loading
},
webView:
Platform.OS === 'ios'
? { marginTop: 30, marginBottom: 40 }
: { marginTop: 30 },
});