React Native -将ActivityIndicator重新定位到登录按钮

import React from 'react';
import { View, Button, ActivityIndicator, StyleSheet } from 'react-native';

const LoginScreen = () => {
  const [loading, setLoading] = React.useState(false);

  const handleLogin = () => {
    setLoading(true);
    // 执行登录操作
    // ...

    // 登录完成后停止加载指示器
    setLoading(false);
  };

  return (
    <View style={styles.container}>
      <Button title="登录" onPress={handleLogin} disabled={loading} />
      {loading && <ActivityIndicator style={styles.activityIndicator} />}
    </View>
  );
};

const styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
  },
  activityIndicator: {
    position: 'absolute',
    top: '50%',
    alignSelf: 'center',
  },
});

export default LoginScreen;