react-native 完整實(shí)現(xiàn)登錄功能的示例代碼

 <!--加入multipart 的解析器,這個(gè)必須配置，一會(huì)在controller里抓取上傳文件時(shí)要用。否則會(huì)報(bào)錯(cuò)。-->
 <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">

 <property name="maxUploadSize" value="102400"></property>

 <property name="defaultEncoding" value="utf-8"/><!--屬性：編碼-->

 </bean>

import React, { Component } from 'react';
import {
 ToolbarAndroid,
 AppRegistry,
 StyleSheet,
 Text,
 View,
 Image,
 TextInput,
 TouchableOpacity
} from 'react-native';
import EditView from '../lib/EditView';
import LoginButton from '../lib/LoginButton';
import LoginSuccess from '../ui/LoginSuccess';
import NetUitl from '../lib/NetUtil';
export default class LoginActivity extends Component {
 constructor(props) {
 super(props);
 this.userName = "";
 this.password = "";
 }

 render() {
 return (

 <View style={LoginStyles.loginview}>
 <View style={{flexDirection: 'row',height:100,marginTop:1,
 justifyContent: 'center',
 alignItems: 'flex-start',}}>
 <Image source={require('../image/login.png')}/>
 </View>
 <View style={{marginTop:80}}>
 <EditView name='輸入用戶名/注冊(cè)手機(jī)號(hào)' onChangeText={(text) => {
 this.userName = text;
 }}/>
 <EditView name='輸入密碼' onChangeText={(text) => {
 this.password = text;
 }}/>
 <LoginButton name='登錄' onPressCallback={this.onPressCallback}/>
 <Text style={{color:"#4A90E2",textAlign:'center',marginTop:10}} >忘記密碼？</Text>
 </View>
 </View>
 )
 }


 onPressCallback = () => {
 let formData = new FormData();
 formData.append("loginName",this.userName);
 formData.append("pwd",this.password);
 let url = "http://localhost:8080/loginApp";
 NetUitl.postJson(url,formData,(responseText) => {
 alert(responseText);
 this.onLoginSuccess();
 })


 };

 //跳轉(zhuǎn)到第二個(gè)頁面去
 onLoginSuccess(){
 const { navigator } = this.props;
 if (navigator) {
 navigator.push({
 name : 'LoginSuccess',
 component : LoginSuccess,
 });
 }
 }

}

class loginLineView extends Component {
 render() {
 return (
 <Text >
 沒有帳號(hào)
 </Text>
 );
 }
}

const LoginStyles = StyleSheet.create({
 loginview: {
 flex: 1,
 padding: 30,
 backgroundColor: '#ffffff',
 },
});

import React, { Component } from 'react';
import {
 ToolbarAndroid,
 AppRegistry,
 StyleSheet,
 Text,
 View,
 Image,
 TextInput,
 TouchableOpacity
} from 'react-native';
export default class EditView extends Component {
 constructor(props) {
 super(props);
 this.state = {text: ''};
 }

 render() {
 return (
 <View style={LoginStyles.TextInputView}>
 <TextInput style={LoginStyles.TextInput}
 placeholder={this.props.name}
 onChangeText={
 (text) => {
 this.setState({text});
 this.props.onChangeText(text);
 }
 }
 />
 </View>
 );
 }
}


const LoginStyles = StyleSheet.create({
 TextInputView: {
 marginTop: 10,
 height:50,
 backgroundColor: '#ffffff',
 borderRadius:5,
 borderWidth:0.3,
 borderColor:'#000000',
 flexDirection: 'column',
 justifyContent: 'center',
 },

 TextInput: {
 backgroundColor: '#ffffff',
 height:45,
 margin:18,
 },
});

import React, { Component } from 'react';
import {
 ToolbarAndroid,
 AppRegistry,
 StyleSheet,
 Text,
 View,
 Image,
 TextInput,
 TouchableOpacity
} from 'react-native';
export default class LoginButton extends Component {
 constructor(props) {
 super(props);
 this.state = {text: ''};
 }
 render() {
 return (
 <TouchableOpacity onPress={this.props.onPressCallback} style={LoginStyles.loginTextView}>
 <Text style={LoginStyles.loginText} >
 {this.props.name}
 </Text>
 </TouchableOpacity>
 );
 }
}
const LoginStyles = StyleSheet.create({

 loginText: {
 color: '#ffffff',
 fontWeight: 'bold',
 width:30,
 },
 loginTextView: {
 marginTop: 10,
 height:50,
 backgroundColor: '#3281DD',
 borderRadius:5,
 flexDirection: 'row',
 justifyContent: 'center',
 alignItems:'center',
 },
});

let NetUtil = {
 postJson(url, data, callback){
 var fetchOptions = {
 method: 'POST',
 headers: {
 'Accept': 'application/json',
 'Content-Type': 'multipart/form-data;boundary=6ff46e0b6b5148d984f148b6542e5a5d'
 },
 body:data
 };

 fetch(url, fetchOptions)
 .then((response) => response.text())
 .then((responseText) => {
 // callback(JSON.parse(responseText));
 callback(responseText);
 }).done();
 },
}
export default NetUtil;

import React from 'react';
import {
 View,
 Navigator,
 TouchableOpacity,
 ToolbarAndroid,
 Text
} from 'react-native';
export default class LoginSuccess extends React.Component {
 constructor(props){
 super(props);
 this.state = {};

 }
 //回到第一個(gè)頁面去
 onJump(){
 const { navigator } = this.props;
 if (navigator) {
 navigator.pop();
 }
 }

 render(){
 return (

 <View >
 <TouchableOpacity onPress = {this.onJump.bind(this)}>
 <Text> 登錄成功，點(diǎn)擊返回登錄頁面 </Text>
 </TouchableOpacity>
 </View>


 );

 }

}

/**
 * Sample React Native App
 * https://github.com/facebook/react-native
 * @flow
 */

import React, { Component } from 'react';
import {
 AppRegistry,
 StyleSheet,
 Text,
 View,
 Navigator
} from 'react-native';
import Main from './ui/main';
export default class navigator extends Component {
 constructor(props) {
 super(props);
 }
 render() {
 let defaultName = 'Main';
 let defaultComponent = Main;
 return (
 <Navigator
 initialRoute = {{name : defaultName , component: defaultComponent}}
 configureScene = {(route) => {
 return Navigator.SceneConfigs.VerticalDownSwipeJump;
 }}
 renderScene={(route,navigator) => {
 let Component = route.component;
 return <Component {...route.params} navigator = {navigator} />
 }}
 />
 );
 }

};

/**
 * Sample React Native App
 * https://github.com/facebook/react-native
 * @flow
 */
import React, { Component } from 'react';
import {
 ToolbarAndroid,
 AppRegistry,
 StyleSheet,
 Text,
 View,
 Image,
 TextInput,
 TouchableOpacity
} from 'react-native';
import Navigator from './app/navigator';
AppRegistry.registerComponent('AwesomeProject', () => Navigator);