reactjs - 下拉菜单不起作用，在 react-native 中使用 Ts

Question

我使用模型和平面列表制作了自定义下拉组件。但它显示错误（属性'标签'不存在于类型'never'上）并且它不能正常工作。下面的组件代码是该组件部分的整个块

 interface Props {
  label: string;
  data: Array<{label: string; value: string}>;
  onSelect: (item: {label: string; value: string}) => void;
  selected?: undefined;
}

const Dropdown: FC<Props> = ({label, data, onSelect}: any) => {
  const DropdownButton = React.useRef() as React.MutableRefObject<any>;
  const [visible, setVisible] = useState(false);
  const [selected, setSelected] = useState(undefined);
  const [dropdownTop, setDropdownTop] = useState(0);

  const toggleDropdown = (): void => {
    visible ? setVisible(false) : openDropdown();
  };

  const openDropdown = (): void => {
    DropdownButton.current.measure(
      (_fx: any, _fy: any, _w: any, h: any, _px: any, py: any) => {
        setDropdownTop(py + h);
      },
    );
    setVisible(true);
  };

  const onItemPress = ({item}: any): void => {
    setSelected(item);
    onSelect(item);
    setVisible(false);
  };

  const renderItem = ({item}: any): ReactElement<any, any> => (
    <TouchableOpacity style={styles.item} onPress={() => onItemPress(item)}>
      <Text>{item.label}</Text>
    </TouchableOpacity>
  );

  const renderDropdown = (): ReactElement<any, any> => {
    return (
      <Modal visible={visible} transparent animationType="none">
        <TouchableOpacity
          style={styles.overlay}
          onPress={() => setVisible(false)}>
          <View style={[styles.dropdown, {top: dropdownTop}]}>
            <FlatList
              data={data}
              renderItem={renderItem}
              keyExtractor={(item, index) => index.toString()}
            />
          </View>
        </TouchableOpacity>
      </Modal>
    );
  };
 return (
    <TouchableOpacity
      ref={DropdownButton}
      style={styles.button}
      onPress={toggleDropdown}>
      {renderDropdown()}
      <Text style={styles.buttonText}>
        {(selected && selected.label) || label}
      </Text>
      <Icon
        style={styles.icon}
        type="font-awesome"
        name="chevron-down"
        tvParallaxProperties={undefined}
      />
    </TouchableOpacity>
  );
};

及其用法如下：-

 const [selected, setSelected] = useState(undefined);
  const data = [
    {label: 'One', value: '1'},
    {label: 'Two', value: '2'},
    {label: 'Three', value: '3'},
    {label: 'Four', value: '4'},
    {label: 'Five', value: '5'},
  ];

  return <Dropdown label="Select Item" data={data} onSelect={setSelected} />;

主要错误：-单击下拉列表中的值后，它未显示为选中状态。