后退按钮react native不会关闭应用程序

npm install @react-navigation/native

import { NavigationContainer } from '@react-navigation/native';
import { createStackNavigator } from '@react-navigation/stack';

const Stack = createStackNavigator();

function HomeScreen({ navigation }) {
  return (
    <View>
      <Text>Home Screen</Text>
      <Button title="Go to Details" onPress={() => navigation.navigate('Details')} />
    </View>
  );
}

function DetailsScreen({ navigation }) {
  return (
    <View>
      <Text>Details Screen</Text>
      <Button title="Go back" onPress={() => navigation.goBack()} />
    </View>
  );
}

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

export default App;