我有一个应用程序，当用户单击它们而不是导航到完全不同的页面时，我希望某些导航路线在当前页面上显示模式。我现有的代码是：

const DrawerNavigator = () => {
    return (
      <Drawer.Navigator>
        <Drawer.Screen name="My Porfolio" component={Portfolio} />
        <Drawer.Screen name="Account" component={Account} />
        <Drawer.Screen name="NBA" component = {NBALobby} />
        <Drawer.Screen name="NFL" component = {NFLLobby} />
        <Drawer.Screen name="How To Play" component = {HowToPlayModal} />
      </Drawer.Navigator>
    );
  }

我的模式按预期显示，但它似乎显示在一个新的、完全空白的页面上。有没有办法从 Drawer Navigator 中调用一个函数来显示模态？

我的模态代码是：

import React, { Component, useState } from 'react';
import {Text, TextInput, View, TouchableOpacity} from 'react-native';
import Modal from 'react-native-modal';

import {styles} from '../styles/signUpIn';
    
const HowToPlayModal = () => {
    
    return(
        <Modal isVisible = {true}>
                <View style={styles.container2}>
                <View style={{flexDirection: 'row'}}>
                        <Text style={styles.title}>How To Play</Text>
                        <View style= {{flex:1, alignItems: 'flex-end'}}>
                                <Text style={[styles.fieldTitle, {marginLeft: 0}]}>Remember?</Text>
                                <Text style={styles.accent} >Sign In</Text>
                        </View>      
                </View>
                </View>
        </Modal>
        );
}
    
export default HowToPlayModal;