React原生FlatList未滚动到末尾

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

const ITEM_HEIGHT = 50;

const App = () => {
  const [data, setData] = useState(Array.from({ length: 100 }, (_, i) => ({ id: i, title: `Item ${i}` })));

  const handleLoadMore = () => {
    // 模拟加载更多数据
    const newData = Array.from({ length: 10 }, (_, i) => ({ id: data.length + i, title: `Item ${data.length + i}` }));
    setData([...data, ...newData]);
  };

  return (
    <View style={styles.container}>
      <FlatList
        data={data}
        renderItem={({ item }) => <Text style={styles.item}>{item.title}</Text>}
        keyExtractor={item => item.id}
        style={styles.flatList}
        getItemLayout={(data, index) => ({
          length: ITEM_HEIGHT,
          offset: ITEM_HEIGHT * index,
          index,
        })}
        onEndReached={handleLoadMore}
        onEndReachedThreshold={0.5}
      />
    </View>
  );
};

const styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
  },
  flatList: {
    width: '80%',
    height: '80%',
  },
  item: {
    height: ITEM_HEIGHT,
    justifyContent: 'center',
    alignItems: 'center',
    borderBottomWidth: 1,
    borderBottomColor: '#ccc',
  },
});

export default App;