如何在react native上关闭动画编写的简单灯箱

// Lightbox.js
import React, { useState, useRef } from 'react';
import { View, Modal, Text, TouchableOpacity, Animated, StyleSheet } from 'react-native';

const Lightbox = ({ visible, onClose }) => {
  const [showModal, setShowModal] = useState(visible);
  const opacity = useRef(new Animated.Value(0)).current;

  React.useEffect(() => {
    if (visible) {
      setShowModal(true);
      Animated.timing(opacity, {
        toValue: 1,
        duration: 300,
        useNativeDriver: true,
      }).start();
    } else {
      Animated.timing(opacity, {
        toValue: 0,
        duration: 300,
        useNativeDriver: true,
      }).start(() => setShowModal(false));
    }
  }, [visible]);

  if (!showModal) return null;

  return (
    <Modal transparent={true} visible={showModal} animationType="none">
      <Animated.View style={[styles.overlay, { opacity }]}>
        <View style={styles.lightbox}>
          <Text style={styles.text}>This is a Lightbox</Text>
          <TouchableOpacity onPress={onClose} style={styles.button}>
            <Text style={styles.buttonText}>Close</Text>
          </TouchableOpacity>
        </View>
      </Animated.View>
    </Modal>
  );
};

const styles = StyleSheet.create({
  overlay: {
    flex: 1,
    backgroundColor: 'rgba(0, 0, 0, 0.5)',
    justifyContent: 'center',
    alignItems: 'center',
  },
  lightbox: {
    width: 300,
    padding: 20,
    backgroundColor: 'white',
    borderRadius: 10,
    alignItems: 'center',
  },
  text: {
    marginBottom: 20,
    fontSize: 18,
  },
  button: {
    padding: 10,
    backgroundColor: '#007BFF',
    borderRadius: 5,
  },
  buttonText: {
    color: 'white',
    fontSize: 16,
  },
});

export default Lightbox;

// App.js
import React, { useState } from 'react';
import { View, Text, TouchableOpacity, StyleSheet } from 'react-native';
import Lightbox from './Lightbox';

const App = () => {
  const [lightboxVisible, setLightboxVisible] = useState(false);

  return (
    <View style={styles.container}>
      <TouchableOpacity onPress={() => setLightboxVisible(true)} style={styles.openButton}>
        <Text style={styles.buttonText}>Open Lightbox</Text>
      </TouchableOpacity>
      <Lightbox visible={lightboxVisible} onClose={() => setLightboxVisible(false)} />
    </View>
  );
};

const styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
  },
  openButton: {
    padding: 10,
    backgroundColor: '#007BFF',
    borderRadius: 5,
  },
  buttonText: {
    color: 'white',
    fontSize: 16,
  },
});

export default App;