React Native Academy · Pelajaran

Navigator Tab Bawah

Buat navigator tab bawah dengan tiga tab, sesuaikan ikon setiap tab menggunakan pustaka ikon vektor, lalu konfigurasi warna semburat aktif.

Navigator Tab Bawah adalah pelajaran React Native Academy gratis di CoddyKit. Ini adalah pelajaran 3 dari 4. Kamu bisa membaca pelajaran lengkapnya di bawah secara gratis — lalu praktikkan langsung di browser dengan editor kode bawaan dan tutor AI 24/7. Ini adalah bagian dari jalur belajar React Native Academy, dan progresmu tersinkronisasi di web dan aplikasi CoddyKit. Kursus React Native Academy mencakup 4 pelajaran total.

Bagian dari pelajaran ini belum diterjemahkan dan ditampilkan dalam bahasa Inggris.

What is a Bottom Tab Navigator?

A bottom tab navigator renders a tab bar at the bottom of the screen with one tab per registered screen. Tapping a tab switches to that screen. This pattern is very common in mobile apps (Instagram, Twitter, Airbnb) and is provided by the @react-navigation/bottom-tabs package.

Installing the Bottom Tabs Package

Install the bottom tabs navigator package separately from the React Navigation core. If you are using Expo, also make sure react-native-screens and react-native-safe-area-context are already installed from the previous setup step.

npm install @react-navigation/bottom-tabs

Creating the Tab Navigator

Call createBottomTabNavigator() to get a Tab object with Tab.Navigator and Tab.Screen components. Register screens exactly as you would in a stack navigator. Each Tab.Screen name becomes the default tab label.

import { createBottomTabNavigator } from '@react-navigation/bottom-tabs';

const Tab = createBottomTabNavigator();

function MyTabs() {
  return (
    <Tab.Navigator>
      <Tab.Screen name='Home' component={HomeScreen} />
      <Tab.Screen name='Search' component={SearchScreen} />
      <Tab.Screen name='Profile' component={ProfileScreen} />
    </Tab.Navigator>
  );
}

Adding Icons to Tab Screens

Each tab should have an icon to help users recognize it quickly. Use tabBarIcon inside the screen's options prop. The render function receives a focused boolean and a color so you can render different icons or colors for active vs inactive tabs.

import { Ionicons } from '@expo/vector-icons';

<Tab.Screen
  name='Home'
  component={HomeScreen}
  options={{
    tabBarIcon: ({ focused, color, size }) => (
      <Ionicons
        name={focused ? 'home' : 'home-outline'}
        size={size}
        color={color}
      />
    ),
  }}
/>

Customizing Active and Inactive Colors

Set tabBarActiveTintColor and tabBarInactiveTintColor in screenOptions to control the color of tab icons and labels for the selected and unselected states. These color values are passed into the tabBarIcon render function automatically.

<Tab.Navigator
  screenOptions={{
    tabBarActiveTintColor: '#6200ee',
    tabBarInactiveTintColor: '#888',
  }}
>

Hiding the Tab Bar on Specific Screens

Sometimes you want to hide the tab bar when navigating to a detail screen. Set tabBarStyle: { display: 'none' } in the screen's options or use the navigation prop to toggle it dynamically with navigation.setOptions.

<Tab.Screen
  name='Details'
  component={DetailsScreen}
  options={{ tabBarStyle: { display: 'none' } }}
/>

Changing Tab Label and Badge

Override the tab label with tabBarLabel in the screen options. Add a notification badge using tabBarBadge to show a count indicator on the icon — useful for messaging or notification tabs. Set tabBarBadge to a number or string.

<Tab.Screen
  name='Messages'
  component={MessagesScreen}
  options={{
    tabBarLabel: 'Inbox',
    tabBarBadge: 3,
  }}
/>

Styling the Tab Bar Background

Customize the tab bar background color and border using tabBarStyle in screenOptions. You can set backgroundColor, borderTopColor, elevation (Android shadow), and height to match your design system.

<Tab.Navigator
  screenOptions={{
    tabBarStyle: {
      backgroundColor: '#1a1a2e',
      borderTopColor: '#333',
      height: 60,
    },
    tabBarLabelStyle: { fontSize: 12, paddingBottom: 4 },
  }}
>

Navigating Between Tabs Programmatically

Use navigation.navigate('TabName') to switch to a specific tab from any screen within the navigator. This is useful when a button action in one tab should take the user to another section of the app. The active tab's state is preserved.

function HomeScreen({ navigation }) {
  return (
    <Button
      title='Go to Profile'
      onPress={() => navigation.navigate('Profile')}
    />
  );
}

Listening to Tab Press Events

Use the tabPress event on navigation to intercept a tab press. This is useful for scrolling a list back to the top when the user taps the active tab. Call e.preventDefault() if you want to handle the press yourself without the default navigation action.

navigation.addListener('tabPress', (e) => {
  // Prevent default behavior
  e.preventDefault();
  // Custom action: scroll to top, show modal, etc.
});

Nesting a Stack Inside a Tab

In real apps each tab often contains its own stack of screens. Simply nest a Stack.Navigator as the component for a Tab.Screen. The stack renders inside the tab area while the tab bar remains visible at the bottom of the screen.

function HomeStack() {
  return (
    <Stack.Navigator>
      <Stack.Screen name='Home' component={HomeScreen} />
      <Stack.Screen name='Post' component={PostScreen} />
    </Stack.Navigator>
  );
}

<Tab.Screen name='HomeTab' component={HomeStack} />

Quick Check

Test your understanding of Bottom Tab Navigator concepts from this lesson.

Lesson Recap

In this lesson you learned: install and create a bottom tab navigator with createBottomTabNavigator, add icons using tabBarIcon in screen options, and customize colors, labels, and badges globally via screenOptions. Next up we explore the Drawer Navigator and nested navigators.

Pertanyaan yang Sering Diajukan

Apakah pelajaran “Navigator Tab Bawah” gratis?

Ya — teks lengkap “Navigator Tab Bawah” gratis dibaca di sini di web. Untuk praktiknya secara interaktif (editor kode bawaan dan tutor AI 24/7) dan buka sisa kursus React Native Academy, upgrade ke CoddyKit PRO. Kursus React Native Academy mencakup 4 pelajaran total.

Apa yang akan aku pelajari di “Navigator Tab Bawah”?

Buat navigator tab bawah dengan tiga tab, sesuaikan ikon setiap tab menggunakan pustaka ikon vektor, lalu konfigurasi warna semburat aktif. Kamu berlatih React Native Academy dengan kode praktik yang langsung kamu jalankan di browser, dan tutor AI 24/7 menjawab pertanyaanmu saat kamu mengerjakan pelajaran ini.

Apakah aku perlu pengalaman untuk memulai React Native Academy?

Tidak diperlukan pengalaman sebelumnya. React Native Academy di CoddyKit dirancang untuk pemula hingga pelajar tingkat lanjut, jadi kamu bisa memulai di sini atau dari awal dan belajar sesuai kecepatan kamu sendiri. Ini adalah pelajaran 3 dari 4.

Berapa lama pelajaran “Navigator Tab Bawah” memakan waktu?

Sebagian besar pelajaran CoddyKit memakan waktu sekitar 5–10 menit. Setiap pelajaran ringkas dan interaktif, jadi kamu membuat kemajuan stabil dan melanjutkan dari tempat kamu tinggalkan di web dan aplikasi.

Bisakah aku menulis dan menjalankan kode dalam pelajaran React Native Academy ini?

Ya. Setiap pelajaran React Native Academy menyertakan editor kode bawaan, jadi kamu menulis dan menjalankan kode nyata langsung di browser dan mendapatkan umpan balik AI instan — tidak diperlukan penyiapan lokal.

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