React Navigation installation in React Native - Mini App: Build & Ship

Build: Home Screen

A simple home screen with a button to navigate to a Details screen using React Navigation.

Target UI

-------------------
|     Home Screen  |
|                  |
|  [Go to Details] |
|                  |
-------------------

Install React Navigation and its dependencies

Set up a basic stack navigator with two screens: Home and Details

Home screen has a button labeled 'Go to Details' that navigates to Details screen

Details screen shows a simple text 'Details Screen'

Starter Code

React Native

import React from 'react';
import { Button, Text, View } from 'react-native';

export default function HomeScreen({ navigation }) {
  return (
    <View style={{ flex: 1, justifyContent: 'center', alignItems: 'center' }}>
      {/* TODO: Add Button to navigate to Details screen */}
    </View>
  );
}

export function DetailsScreen() {
  return (
    <View style={{ flex: 1, justifyContent: 'center', alignItems: 'center' }}>
      <Text>Details Screen</Text>
    </View>
  );
}

// TODO: Set up Navigation Container and Stack Navigator here

Task 1

Task 2

Task 3

Task 4

Solution

React Native

import React from 'react';
import { Button, Text, View } from 'react-native';
import { NavigationContainer } from '@react-navigation/native';
import { createNativeStackNavigator } from '@react-navigation/native-stack';

function HomeScreen({ navigation }) {
  return (
    <View style={{ flex: 1, justifyContent: 'center', alignItems: 'center' }}>
      <Button title="Go to Details" onPress={() => navigation.navigate('Details')} />
    </View>
  );
}

function DetailsScreen() {
  return (
    <View style={{ flex: 1, justifyContent: 'center', alignItems: 'center' }}>
      <Text>Details Screen</Text>
    </View>
  );
}

const Stack = createNativeStackNavigator();

export default function App() {
  return (
    <NavigationContainer>
      <Stack.Navigator>
        <Stack.Screen name="Home" component={HomeScreen} />
        <Stack.Screen name="Details" component={DetailsScreen} />
      </Stack.Navigator>
    </NavigationContainer>
  );
}

This solution shows how to install and set up React Navigation for a simple two-screen app.

First, you install the required packages:

npm install @react-navigation/native @react-navigation/native-stack react-native-screens react-native-safe-area-context react-native-gesture-handler react-native-reanimated

Then, you import NavigationContainer which manages navigation state, and createNativeStackNavigator to create a stack of screens.

The HomeScreen has a button that calls navigation.navigate('Details') to go to the Details screen.

The DetailsScreen just shows some text.

The App component wraps the stack navigator inside the navigation container.

This setup follows React Navigation's official guidelines and creates a working navigation flow.

Final Result

Completed Screen

-------------------
|     Home Screen  |
|                  |
|  [Go to Details] |
|                  |
-------------------

-- After tapping button --

-------------------
|   Details Screen  |
|                   |
|  Details Screen    |
|                   |
-------------------

User sees Home Screen with a button labeled 'Go to Details'.

When user taps the button, app navigates to Details Screen.

Details Screen shows text 'Details Screen'.

User can use back gesture or button to return to Home Screen.

Stretch Goal

Add a header title to each screen in the stack navigator.

💡 Hint

Use the 'options' prop on Stack.Screen to set 'title' property.

Practice

1.

What is the main purpose of React Navigation in a React Native app?

easy

A. To style components with CSS

B. To manage app state globally

C. To move between different screens in the app

D. To fetch data from the internet

Solution

1. Step 1: Understand React Navigation's role

   React Navigation is designed to help users switch between different screens or pages in a React Native app.

2. Step 2: Compare with other options

   Styling is done with stylesheets, state management uses other libraries, and data fetching is separate from navigation.

3. Final Answer:

   To move between different screens in the app -> Option C

4. Quick Check:

   Navigation = Moving between screens [OK]

Hint: React Navigation controls screen changes [OK]

Common Mistakes:

• Confusing navigation with styling
• Mixing navigation with state management
• Thinking it fetches data

2.

Which command correctly installs the core React Navigation library using npm?

?

easy

A. npm install @react-navigation/native

B. npm install react-navigation

C. npm install navigation-react

D. npm install @react-navigation/core

Solution

1. Step 1: Identify the official package name

   The official core package for React Navigation is '@react-navigation/native'.

2. Step 2: Check other options

   'react-navigation' is outdated, 'navigation-react' and '@react-navigation/core' are incorrect package names.

3. Final Answer:

   npm install @react-navigation/native -> Option A

4. Quick Check:

   Core package = @react-navigation/native [OK]

Hint: Core package always starts with @react-navigation/native [OK]

Common Mistakes:

• Using outdated package names
• Misspelling package names
• Installing wrong packages

3.

After installing React Navigation core, you run npm install react-native-screens react-native-safe-area-context. What is the expected result?

medium

A. The app will lose navigation functionality

B. The app will crash immediately on start

C. These packages are unrelated and cause no effect

D. The app will have improved screen performance and safe area handling

Solution

1. Step 1: Understand the purpose of the packages

   'react-native-screens' improves screen rendering performance, and 'react-native-safe-area-context' manages safe areas on devices.

2. Step 2: Predict the effect on the app

   Installing these packages enhances navigation experience by improving performance and layout safety.

3. Final Answer:

   The app will have improved screen performance and safe area handling -> Option D

4. Quick Check:

   Supporting packages improve navigation quality [OK]

Hint: Supporting packages enhance navigation, not break it [OK]

Common Mistakes:

• Thinking these packages cause crashes
• Assuming no effect
• Confusing with unrelated packages

4.

You installed React Navigation and dependencies on iOS but forgot to run pod install. What issue will most likely occur?

medium

A. The app will work perfectly without any issues

B. The app will fail to build or crash due to missing native modules

C. The app will show navigation but with wrong colors

D. The app will only crash on Android devices

Solution

1. Step 1: Understand the role of pod install

   On iOS, pod install links native dependencies required by React Navigation.

2. Step 2: Predict the consequence of skipping it

   Without running pod install, native modules are missing, causing build failures or runtime crashes on iOS.

3. Final Answer:

   The app will fail to build or crash due to missing native modules -> Option B

4. Quick Check:

   Missing pod install = build failure [OK]

Hint: Always run pod install on iOS after npm installs [OK]

Common Mistakes:

• Skipping pod install on iOS
• Assuming Android needs pod install
• Ignoring build errors

5.

You want to install React Navigation in a new Expo project. Which sequence of commands is correct?

?

hard

A. expo install @react-navigation/native react-native-screens react-native-safe-area-context

B. npm install react-navigation && pod install

C. expo install react-navigation && npm install react-native-safe-area-context

D. npm install @react-navigation/native && npm install react-native-screens

Solution

1. Step 1: Identify Expo-specific installation

   Expo recommends using expo install to install compatible versions of React Navigation and dependencies.

2. Step 2: Check the correct packages

   The core package is '@react-navigation/native' plus 'react-native-screens' and 'react-native-safe-area-context' for performance and layout.

3. Step 3: Verify other options

   Options B and C use outdated or incomplete commands; D uses npm but misses safe-area-context and pod install is not needed in Expo.

4. Final Answer:

   expo install @react-navigation/native react-native-screens react-native-safe-area-context -> Option A

5. Quick Check:

   Expo uses expo install with core packages [OK]

Hint: Use expo install for React Navigation in Expo projects [OK]

Common Mistakes:

• Using npm instead of expo install in Expo
• Missing dependencies
• Running pod install in Expo projects