如何在React Native中使用flexbox将一个项目居中？

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

const App = () => {
  return (
    <View style={styles.container}>
      {/* 居中的组件 */}
    </View>
  );
};

const styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
  },
});

const App = () => {
  return (
    <View style={styles.container}>
      <Text>居中显示的文本</Text>
    </View>
  );
};