我正在使用react-native和redux,thunk開發移動應用程序,這是我第一次通過react-native 。React Native Redux如何更新UI,在未使用標誌的調用API之後導航到新屏幕
我的問題是我打電話api和響應是有效的,我想做一些更新的用戶界面,導航到新的屏幕......爲此,我將需要在我的組件標記它使用的標誌。
這是登錄示例,用戶登錄成功後,我想導航到主屏幕。爲了做到這一點,我需要檢查一個標誌isLoginSuccess
在方法componentWillReceiveProps
的方法道具知道用戶已登錄成功與否,但我認爲這不是好的解決方案。
我的問題是我們有其他方式可以不使用標誌。
action.js
export const LOGIN_SUCCESS = "LOGIN_SUCCESS";
export const LOGIN_FAIL = "LOGIN_FAIL";
export const LOGIN = "LOGIN";
export function login(username, password) {
console.log(username)
return {
type: LOGIN,
username: username,
password: password
}
}
export function loginSuccess(data) {
return {
type: LOGIN_SUCCESS,
loginData: data
}
}
export function loginFail(error) {
return {
type: LOGIN_FAIL,
error: error
}
}
export function doLogin(username, password) {
return (dispatch) => {
dispatch(login(username, password))
api.login(username, password)
.then(response => response.json())
.then(jsonData => {
console.log(jsonData)
dispatch(loginSuccess(jsonData))
})
.catch((error) => {
dispatch(loginFail(error))
})
}
}
reducer.js
const initialState = {
loginData:{},
isLoginDoing : false,
isLoginSuccess : false,
username :"",
password : "",
error : {},
}
export default function(state = initialState , action ={}){
switch(action.type){
case actionType.LOGIN:{
return {
...state,
username: action.username,
password: action.password,
isLoginDoing : true
}
}
case actionType.LOGIN_SUCCESS:{
return {
...state,
loginData: action.loginData,
isLoginDoing : false,
isLoginSuccess : true
}
}
case actionType.LOGIN_FAIL:{
return {
...state,
isLoginDoing : false,
isLoginSuccess : false,
error : action.error
}
}
default :{
return state
}
}
}
component.js
import { connect } from "react-redux"
import { bindActionCreators } from 'redux';
import { doLogin } from '../actions'
import BaseComponent from './baseComponent'
class Login extends BaseComponent {
constructor(props) {
super(props)
this.state = {
username: '',
password: '',
}
this.functionLogin = this.functionLogin.bind(this);
}
functionLogin() {
const { username, password } = this.state;
if(!this.props.loginReducer.isLoginDoing){
this.props.doLogin(username, password)
}
}
componentWillReceiveProps (nextProps) {
console.log("componentWillReceiveProps");
const { navigate, goBack } = this.props.navigation;
if(nextProps.loginReducer.isLoginSuccess){
// this._navigateTo('Home')
navigate('Home',nextProps.loginReducer.loginData);
}
}
render() {
const { navigate, goBack } = this.props.navigation;
return (
<View style={{ backgroundColor: 'color', marginTop: 10 }} >
<TextInput
style={{ height: 40 }}
placeholder="Username"
onChangeText={value => this.setState({ username: value })}
/>
<TextInput
style={{ height: 40 }}
placeholder="Password"
onChangeText={value => this.setState({ password: value })}
/>
<Button
onPress={this.functionLogin}
title="Login"
color="#841584"
/>
</View>
);
}
}
const mapStateToProps = (state) => {
console.log(state);
return {
loginReducer: state.loginReducer
};
}
function mapDispatchToProps(dispatch) {
return {
doLogin: (username, password) => dispatch(doLogin(username, password))
}
}
export default connect(mapStateToProps, mapDispatchToProps)(Login)
感謝
確定。我有你的想法,謝謝:) – asdcvf