[[oktatas:telefon:react_native:navigacio|< Navigáció]]

====== Expo - Native Stack ======

  * **Szerző:** Sallai András
  * Copyright (c) 2024, Sallai András
  * Licenc: [[https://creativecommons.org/licenses/by-sa/4.0/|CC Attribution-Share Alike 4.0 International]]
  * Web: https://szit.hu

===== Bevezetés =====

Webhely:
  * https://reactnavigation.org/docs/native-stack-navigator (2024)
===== Projekt létrehozása =====

  npx create-expo-app app01

  cd app01

  npx expo install react-dom react-native-web @expo/metro-runtime



===== Frissítés mentésre =====

<code javascript App.js>
import "@expo/metro-runtime";

//...
</code>


===== Native Stack telepítés =====

  npm install @react-navigation/native-stack


===== Minőségbiztosítás példa =====

<code javascript App.js>
import { Button, View, Text } from 'react-native';
import { NavigationContainer } from '@react-navigation/native';
import { createNativeStackNavigator } from '@react-navigation/native-stack';

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

function SubjectScreen({ navigation }) {
  return (
    <View style={{ flex: 1, alignItems: 'center', justifyContent: 'center' }}>
      <Button
        title="Tanárok"
        onPress={() => navigation.navigate('Teacher')}
      />
      <Button title="Vissza" onPress={() => navigation.goBack()} />
    </View>
  );
}

function TeacherScreen({ navigation }) {
  return (
    <View style={{ flex: 1, alignItems: 'center', justifyContent: 'center' }}>
      <Button
        title="Kérdések"
        onPress={() => navigation.navigate('Questions')}
      />
      <Button title="Vissza" onPress={() => navigation.goBack()} />
    </View>
  );
}

function QuestionsScreen({ navigation }) {
  return (
    <View style={{ flex: 1, alignItems: 'center', justifyContent: 'center' }}>
      <Button title="Vissza" onPress={() => navigation.goBack()} />
    </View>
  );
}

const Stack = createNativeStackNavigator();

function QualityStack() {
  return (
    <Stack.Navigator>      
      <Stack.Screen name="Home" component={HomeScreen} />
      <Stack.Screen name="Teacher" component={TeacherScreen} />
      <Stack.Screen name="Subject" component={SubjectScreen} />
      <Stack.Screen name="Questions" component={QuestionsScreen} />
    </Stack.Navigator>
  );
}

export default function App() {
  return (
    <NavigationContainer>
      <QualityStack />
    </NavigationContainer>
  );
}
</code>