javascript - 底页模态无法在 Expo 中运行

Question

我正在尝试将此库与以下代码一起使用：

import React, { useCallback, useRef, useMemo } from "react";
import { StyleSheet, View, Text, Button } from "react-native";
import BottomSheet, { BottomSheetFlatList } from "@gorhom/bottom-sheet";

const App = () => {
  // hooks
  const sheetRef = useRef < BottomSheet > null;

  // variables
  const data = useMemo(
    () =>
      Array(50)
        .fill(0)
        .map((_, index) => `index-${index}`),
    []
  );
  const snapPoints = useMemo(() => ["25%", "50%", "90%"], []);

  // callbacks
  const handleSheetChange = useCallback((index) => {
    console.log("handleSheetChange", index);
  }, []);
  const handleSnapPress = useCallback((index) => {
    sheetRef.current?.snapTo(index);
  }, []);
  const handleClosePress = useCallback(() => {
    sheetRef.current?.close();
  }, []);

  // render
  const renderItem = useCallback(
    ({ item }) => (
      <View style={styles.itemContainer}>
        <Text>{item}</Text>
      </View>
    ),
    []
  );
  return (
    <View style={styles.container}>
      <Button title="Snap To 90%" onPress={() => handleSnapPress(2)} />
      <Button title="Snap To 50%" onPress={() => handleSnapPress(1)} />
      <Button title="Snap To 25%" onPress={() => handleSnapPress(0)} />
      <Button title="Close" onPress={() => handleClosePress()} />
      <BottomSheet
        ref={sheetRef}
        snapPoints={snapPoints}
        onChange={handleSheetChange}
      >
        <BottomSheetFlatList
          data={data}
          keyExtractor={(i) => i}
          renderItem={renderItem}
          contentContainerStyle={styles.contentContainer}
        />
      </BottomSheet>
    </View>
  );
};

const styles = StyleSheet.create({
  container: {
    flex: 1,
    paddingTop: 200,
  },
  contentContainer: {
    backgroundColor: "white",
  },
  itemContainer: {
    padding: 6,
    margin: 6,
    backgroundColor: "#eee",
  },
});

export default App;

但我有一个错误：

错误：函数组件不能有字符串引用。我们建议改用 useRef()。在此处了解有关安全使用 refs 的更多信息：

我在博览会上运行它，但这个库支持它。所以我不知道问题出在哪里以及如何解决？也许这

常量 sheetRef = useRef < BottomSheet > null;

导致问题？

对不起，我的英语不好！

标签： javascriptreact-native