React Native和节点js – 获取input值并在控制器中使用它们

我有一个具有用户名和密码文本input字段的反应原生组件。 我想要input的值在节点js控制器中查询我的数据库。 我无法使用AsyncStorage，因为我无法在控制器内导入AsyncStorage。 我该如何做这项工作？ 请帮忙。

我的login画面：

import React, { Component } from 'react'; import { StyleSheet, Text, View, Image, TextInput, Alert, Navigator, TouchableHighlight, BackAndroid, ScrollView, AsyncStorage, } from 'react-native'; var _navigator; import Container from './Container'; import Button from './Button'; import Label from './Label'; import ImageContainer from './ImageContainer'; import RegisterView from './RegisterView'; export default class LoginView extends Component { constructor(props) { super(props); this.state = { userName: '', userPass: '', error:null, }; } _navigate(){ this.props.navigator.push({ name: 'RegisterView', // Matches route.name }) } _handleAdd = () => { if((this.state.userName)!=="" && (this.state.userPass)!=="" ){ const data = { username: this.state.userName, password: this.state.userPass } // Serialize and post the data const json = JSON.stringify(data) fetch('http://10.0.2.2:3000/users/login', { method: 'POST', headers: { 'Content-Type': 'application/json', 'Accept': 'application/json' }, body: json }) .then((response) => response.json()) .then((res) => { if (res.error) { alert(res.error) } else { this.props.navigator.push({ name: 'CheckList', // Matches route.name }) } }) .catch(() => { alert('There was an error logging in.'); }) .done() } else{ alert('Cannot be empty!'); } } render() { return ( <ScrollView style={styles.scroll}> <ImageContainer> <Image style={{width:110,height: 110, justifyContent: 'center', alignItems: 'center'}} source={require('./Logo.png')}> </Image> </ImageContainer> <Container> <TextInput placeholder="Username" style={styles.textInput} onChangeText={(text) => this.setState({userName:text})} autoCapitalize="none" autoCorrect={false} onSubmitEditing={(event) => { const{userName}=this.state.userName; const{onSubmitEditing}=this.props; if(!userName) return onSubmitEditing(userName) this.refs.SecondInput.focus(); }} /> <TextInput placeholder="Password" ref='SecondInput' secureTextEntry={true} onChangeText={(text) => this.setState({userPass:text})} style={styles.textInputPass} /> </Container> <Container> <Button label="Sign In" styles={{button: styles.primaryButton, label: styles.buttonWhiteText}} onPress={() => this._handleAdd()} /> </Container> <Container> <TouchableHighlight onPress={ () => this._navigate()} underlayColor= 'transparent'> <Text style ={styles.buttonBlackText}>New? Register </Text> </TouchableHighlight> </Container> </ScrollView> ); } } const styles = StyleSheet.create({ scroll: { backgroundColor: '#FFFFFF', padding: 30, flexDirection: 'column' }, buttonWhiteText: { fontSize: 20, color: '#FFF' }, buttonBlackText: { fontSize: 20, marginTop: 20, textAlign:'center', color: '#000000' }, textInput: { fontSize: 20, backgroundColor: '#FFF', marginBottom: 20, marginTop: 20 }, textInputPass: { fontSize: 20, backgroundColor: '#FFF', marginBottom: 20, }, primaryButton: { backgroundColor: '#34A853' }, }); 

控制器从数据库查询用户名。 现在，它是硬编码的。

 import Profile from '../models/profile'; import moment from 'moment'; export const index = (req, res, next) => { Profile.find({'username': 'John'}).lean().exec((err, profiles) => res.json( // Iterate through each movie { profiles: profiles.map(profile => ({ ...profile, }))} )); };