screens/MainScreen.js

import React from 'react';
import {createMaterialTopTabNavigator} from '@react-navigation/material-top-tabs';
import {Text, Button, View} from 'react-native';
import Icon from 'react-native-vector-icons/MaterialIcons';

const Tab = createMaterialTopTabNavigator();

(...)

function MainScreen() {
  return (
    <Tab.Navigator
      initialRouteName="Home"
      screenOptions={{
        tabBarShowLabel: false,
      }}>
      <Tab.Screen
        name="Home"
        component={HomeScreen}
        options={{
          tabBarIcon: ({color}) => <Icon name="home" color={color} size={24} />,
        }}
      />
      <Tab.Screen
        name="Search"
        component={SearchScreen}
        options={{
          tabBarIcon: ({color}) => (
            <Icon name="search" color={color} size={24} />
          ),
        }}
      />
      <Tab.Screen
        name="Notification"
        component={NotificationScreen}
        options={{
          tabBarIcon: ({color}) => (
            <Icon name="notifications" color={color} size={24} />
          ),
        }}
      />
      <Tab.Screen
        name="Message"
        component={MessageScreen}
        options={{
          tabBarIcon: ({color}) => (
            <Icon name="message" color={color} size={24} />
          ),
        }}
      />
    </Tab.Navigator>
  );
}

export default MainScreen;

코드를 저장한 뒤, yarn ios와 yarn android 명령어를 다시 입력하여 시뮬레이터를 재시작하세요.