标题： **React Native分段多选组件：React-Native-Sectioned-Multi-Select**

import React from 'react';
import { View, Text, StyleSheet } from 'react-native';
import SectionedMultiSelect from 'react-native-sectioned-multi-select';
 
const App = () => {
  const [selectedItems, setSelectedItems] = React.useState({});
 
  const renderItem = (item) => (
    <View style={styles.item}>
      <Text>{item.label}</Text>
    </View>
  );
 
  const renderSectionHeader = (section) => (
    <Text style={styles.sectionHeader}>{section.title}</Text>
  );
 
  const sections = [
    {
      title: 'Section 1',
      data: [
        { key: '1', label: 'Item 1' },
        { key: '2', label: 'Item 2' },
      ],
    },
    {
      title: 'Section 2',
      data: [
        { key: '3', label: 'Item 3' },
        { key: '4', label: 'Item 4' },
      ],
    },
  ];
 
  return (
    <View style={styles.container}>
      <SectionedMultiSelect
        styles={styles}
        renderItem={renderItem}
        renderSectionHeader={renderSectionHeader}
        sections={sections}
        selectedItems={selectedItems}
        onSelectedItemsChange={setSelectedItems}
      />
    </View>
  );
};
 
const styles = StyleSheet.create({
  container: {
    flex: 1,
    padding: 10,
  },
  item: {
    height: 40,
    justifyContent: 'center',
    paddingLeft: 15,
    borderColor: '#ccc',
    borderBottomWidth: 1,
  },
  sectionHeader: {
    paddingTop: 10,
    paddingLeft: 15,
    fontWeight: 'bold',
  },
});
 
export default App;

这个代码实例展示了如何在React Native应用中使用react-native-sectioned-multi-select组件来创建一个分段的多选列表。它定义了自定义的渲染函数来定制每个项目和节标题的外观，并设置了节的数据结构。用户可以选择节中的多个项目，并且可以通过selectedItems状态跟踪所选择的项目。