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[React Native] Redux toolkit 본문
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설치
$ npm install @reduxjs/toolkit
counter.ts
$ mkdir src/redux
$ touch src/redux/counter.ts
import {createSlice} from '@reduxjs/toolkit';
import type {PayloadAction} from '@reduxjs/toolkit';
export interface CounterState {
count: number;
}
const initialState: CounterState = {
count: 0,
};
export const counterSlice = createSlice({
name: 'counter',
initialState,
reducers: {
increment: state => {
state.count += 1;
},
decrement: state => {
state.count -= 1;
},
incrementByAmount: (state, action: PayloadAction<number>) => {
state.count += action.payload;
},
},
});
export const {increment, decrement, incrementByAmount} = counterSlice.actions;
export default counterSlice.reducer;
store.ts
$ touch src/redux/store.ts
import {configureStore} from '@reduxjs/toolkit';
import counterReducer from './counter';
export const store = configureStore({
reducer: counterReducer,
});
export type RootState = ReturnType<typeof store.getState>;
export type AppDispatch = typeof store.dispatch;
App.tsx
import React from 'react';
import {View, StyleSheet} from 'react-native';
import {store} from './src/redux/store';
import {Provider} from 'react-redux';
import HomeScreen from './src/screens/HomeScreen';
const App = () => {
return (
<Provider store={store}>
<View style={styles.container}>
<HomeScreen />
</View>
</Provider>
);
};
export default App;
const styles = StyleSheet.create({
container: {
flex: 1,
justifyContent: 'center',
alignItems: 'center',
marginTop: 100,
},
});
HomeScreen.tsx
import React from 'react';
import {View, Button, Text} from 'react-native';
import type {RootState} from '../redux/store';
import {useSelector, useDispatch} from 'react-redux';
import {decrement, increment, incrementByAmount} from '../redux/counter';
function App() {
const count = useSelector((state: RootState) => state.count);
const dispatch = useDispatch();
return (
<View>
<Button
title="Increment"
aria-label="Increment value"
onPress={() => dispatch(increment())}
/>
<Button
aria-label="Decrement value"
title="Decrement"
onPress={() => dispatch(decrement())}
/>
<Button
aria-label="Decrement value"
title="incrementByAmount"
onPress={() => dispatch(incrementByAmount(10))}
/>
<Text>{count}</Text>
</View>
);
}
export default App;
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