React Native Academy · 课时

抽屉导航器与嵌套导航器

设置抽屉导航器，在其中一个屏幕内嵌套堆栈导航器，并了解嵌套导航器如何与标题栏和返回按钮交互。

抽屉导航器与嵌套导航器 是 CoddyKit 上的免费 React Native Academy 课时。这是第 4 节课，共 4 节。你可以在下方免费阅读本课时的完整内容 — 然后在浏览器中使用内置代码编辑器和全天候 AI 导师进行实践。这是 React Native Academy 学习路径的一部分，你的进度在网页和 CoddyKit 应用中同步。 React Native Academy 课程共包含 4 节课。

本课时的部分内容尚未翻译，以英文显示。

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.

常见问题解答

「抽屉导航器与嵌套导航器」课时是免费的吗？

是的 — 「抽屉导航器与嵌套导航器」的完整文本可在网页上免费阅读。要进行交互式练习（内置代码编辑器和全天候 AI 导师）并解锁 React Native Academy 课程的其余内容，请升级到 CoddyKit PRO。 React Native Academy 课程共包含 4 节课。

「抽屉导航器与嵌套导航器」这节课中我会学到什么？

设置抽屉导航器，在其中一个屏幕内嵌套堆栈导航器，并了解嵌套导航器如何与标题栏和返回按钮交互。你通过在浏览器中直接运行的动手代码来练习 React Native Academy，全天候 AI 导师会在你学习这节课的过程中回答你的问题。

学习 React Native Academy 需要有经验吗？

无需任何先前经验。CoddyKit 上的 React Native Academy 课程适合初学者到高级学习者，你可以从这里开始或从头开始，按照自己的节奏学习。这是第 4 节课，共 4 节。

「抽屉导航器与嵌套导航器」课时需要多长时间？

大多数 CoddyKit 课程大约需要 5–10 分钟。每节课都很精短且互动，所以你能稳步进步，并在网页和应用中从离开的地方继续。

我能在这节 React Native Academy 课中编写并运行代码吗？

能。每节 React Native Academy 课都包含内置代码编辑器，你可以在浏览器中直接编写并运行真实代码，并获得即时 AI 反馈 — 无需本地设置。

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