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React Native Academy · Lezione

Drawer navigator e navigator annidati

Configuri un drawer navigator, annidi uno stack all’interno di una delle sue schermate e comprenda come i navigator annidati interagiscono con l’header e il pulsante Indietro.

Drawer navigator e navigator annidati è una lezione React Native Academy gratuita su CoddyKit. Questa è la lezione 4 di 4. Puoi leggere la lezione completa qui gratuitamente — poi esercitati direttamente nel browser con un editor di codice integrato e un tutor IA disponibile 24/7. Fa parte del percorso di apprendimento React Native Academy, e i tuoi progressi si sincronizzano tra il web e l'app CoddyKit. Il corso React Native Academy include 4 lezioni in totale.

Parti di questa lezione non sono ancora state tradotte e vengono mostrate in inglese.

What is a Drawer Navigator?

A drawer navigator shows a slide-out side menu (drawer) that the user can open by swiping from the left edge or tapping a hamburger icon. It is ideal for apps with many top-level sections that do not fit in a tab bar. React Navigation provides it via the @react-navigation/drawer package.

Installing the Drawer Package

The drawer navigator requires additional gesture and animation libraries. Install the drawer package and its peer dependencies. The drawer relies on react-native-gesture-handler and react-native-reanimated for smooth animations.

npm install @react-navigation/drawer
npx expo install react-native-gesture-handler react-native-reanimated

Configuring Reanimated Babel Plugin

React Native Reanimated requires a Babel plugin to work. Add 'react-native-reanimated/plugin' as the last entry in your babel.config.js plugins array. Restart Metro bundler after making this change to clear the cache.

// babel.config.js
module.exports = function(api) {
  api.cache(true);
  return {
    presets: ['babel-preset-expo'],
    plugins: ['react-native-reanimated/plugin'],
  };
};

Creating a Drawer Navigator

Use createDrawerNavigator() and register screens with Drawer.Screen components. Each screen appears as a menu item in the drawer. The drawer also renders a header with a hamburger menu icon that opens the drawer when tapped.

import { createDrawerNavigator } from '@react-navigation/drawer';

const Drawer = createDrawerNavigator();

function MyDrawer() {
  return (
    <Drawer.Navigator initialRouteName='Home'>
      <Drawer.Screen name='Home' component={HomeScreen} />
      <Drawer.Screen name='Settings' component={SettingsScreen} />
      <Drawer.Screen name='About' component={AboutScreen} />
    </Drawer.Navigator>
  );
}

Opening and Closing the Drawer

From any screen inside the drawer navigator, call navigation.openDrawer() to open the side menu, navigation.closeDrawer() to close it, and navigation.toggleDrawer() to toggle between open and closed. Users can also swipe from the edge or tap the backdrop to close it.

function HomeScreen({ navigation }) {
  return (
    <Button
      title='Open Menu'
      onPress={() => navigation.openDrawer()}
    />
  );
}

Customizing Drawer Screen Options

Use the drawerIcon option on each Drawer.Screen to add an icon next to the menu item. Use drawerLabel to override the display name. These options follow the same pattern as tab navigator options, giving you a consistent API across navigators.

<Drawer.Screen
  name='Home'
  component={HomeScreen}
  options={{
    drawerLabel: 'Dashboard',
    drawerIcon: ({ color, size }) => (
      <Ionicons name='home-outline' size={size} color={color} />
    ),
  }}
/>

What Are Nested Navigators?

Nested navigators occur when you place one navigator inside a screen of another navigator. For example, a drawer navigator can contain a tab navigator, which can itself contain stack navigators inside each tab. This is how complex apps structure their navigation hierarchy.

Nesting a Stack Inside a Drawer Screen

To give each drawer section its own navigation history, use a Stack.Navigator as the component for a Drawer.Screen. The stack's header and the drawer header may conflict — set headerShown: false on the drawer to hide its header and rely on the stack header.

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

<Drawer.Screen
  name='HomeSection'
  component={HomeStack}
  options={{ headerShown: false }}
/>

Navigation Across Nested Navigators

When navigating across nested navigators (e.g., from a screen inside a tab to a screen in another tab's stack), use the full screen name and navigator target. React Navigation resolves the correct navigator. You may also navigate to a parent navigator's screen using navigation.navigate('ParentScreen', { screen: 'ChildScreen' }).

// Navigate to a screen nested inside a different tab
navigation.navigate('ProfileTab', {
  screen: 'EditProfile',
  params: { userId: 5 },
});

The Back Button and Nested Stacks

When a stack is nested inside a tab or drawer, the back button in the stack header only pops the stack — it does not switch tabs or close the drawer. Each navigator manages its own history independently. This is intentional and matches the expected behavior users experience in native apps.

Custom Drawer Content

Replace the default drawer menu with a fully custom component using the drawerContent prop on Drawer.Navigator. Your custom component receives navigation and state props and can display a user avatar, subscription info, or any other content above or below the menu items.

function CustomDrawer(props) {
  return (
    <DrawerContentScrollView {...props}>
      <Image source={{ uri: user.avatar }} style={styles.avatar} />
      <Text>{user.name}</Text>
      <DrawerItemList {...props} />
    </DrawerContentScrollView>
  );
}

<Drawer.Navigator drawerContent={(props) => <CustomDrawer {...props} />}>

Quick Check

Test your understanding of Drawer Navigator and nested navigators from this lesson.

Lesson Recap

In this lesson you learned: create a drawer navigator with createDrawerNavigator, open and close the drawer programmatically with navigation.openDrawer/closeDrawer, and nest navigators by using a navigator component as a screen's component prop. Next up we explore the FlatList component for efficiently rendering large data sets.

Domande Frequenti

La lezione «Drawer navigator e navigator annidati» è gratuita?

Sì — il testo completo di «Drawer navigator e navigator annidati» è gratuito qui sul web. Per esercitarvi in modo interattivo (un editor di codice integrato e un tutor IA 24/7) e sbloccare il resto del corso React Native Academy, passa a CoddyKit PRO. Il corso React Native Academy include 4 lezioni in totale.

Cosa imparerò in «Drawer navigator e navigator annidati»?

Configuri un drawer navigator, annidi uno stack all’interno di una delle sue schermate e comprenda come i navigator annidati interagiscono con l’header e il pulsante Indietro. Eserciti React Native Academy con codice pratico che esegui direttamente nel browser, e un tutor IA 24/7 risponde alle tue domande mentre lavori sulla lezione.

Ho bisogno di esperienza per iniziare React Native Academy?

Non è richiesta alcuna esperienza precedente. React Native Academy su CoddyKit è strutturato per principianti e studenti avanzati, quindi puoi iniziare da qui o dall'inizio e procedere al tuo ritmo. Questa è la lezione 4 di 4.

Quanto tempo richiede la lezione «Drawer navigator e navigator annidati»?

La maggior parte delle lezioni CoddyKit richiede circa 5–10 minuti. Ogni lezione è breve e interattiva, quindi fai progressi costanti e riprendi esattamente da dove hai lasciato su web e app.

Posso scrivere ed eseguire codice in questa lezione React Native Academy?

Sì. Ogni lezione React Native Academy include un editor di codice integrato, quindi scrivi ed esegui codice reale direttamente nel tuo browser e ricevi feedback istantaneo dall'IA — nessuna configurazione locale necessaria.

Tutte le lezioni di questo corso

  1. Installazione e configurazione di React Navigation
  2. Navigazione tra schermate e passaggio dei parametri
  3. Bottom tab navigator
  4. Drawer navigator e navigator annidati
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