前言
前提是你已经搭好环境,并且能跑起来;
否则的话先进行:Mac环境搭建,目标:ios
本项目使用的依赖:
- "dependencies": {
- "lodash": "^4.17.5","mobx": "^4.1.0","mobx-react": "^5.0.0","native-base": "^2.3.5","react": "^16.3.0-alpha.1","react-native": "0.54.4","react-navigation": "^1.5.8"
- },
准备工作
1. 安装相应依赖:mobx 和 mobx-react;
- npm i mobx mobx-react --save
2. 安装一些 babel 插件,以支持 ES7 的 decorator 特性:
- npm i babel-plugin-transform-decorators-legacy babel-preset-react-native-stage-0 --save-dev
3. 打开 .babelrc 没有就创建一个,配置 babel 插件:
- touch .babelrc
写入:
- {
- 'presets': ['react-native'],'plugins': ['transform-decorators-legacy']
- }
补充:ES7装饰器语法在编译器可能会报错;我这里用的是vscode,分享解决办法:
@H_403_31@
- "javascript.implicitProjectConfig.experimentalDecorators": true
至此准备工作已经差不多了,接下来写代码。。。
加入Mobx
1. 根目录下新建 js文件夹; js下新建store
文件夹;
2. store
下新建index.js
作用是合并每个store
到一个store
中去,最终通过 <Provider {...store}>
方式注入<App/>
;
3.分别在store
下新建几个js,示例:
- // home
- import { observable,action } from "mobx";
- class HomeStore {
- @observable text; // 注册变量,使其成为可检测的
- @observable num;
- constructor() {
- this.num = 0; // 初始化变量,可以定义默认值
- this.text = "Hello,this is homePage!!!";
- }
- @action // 方法推荐用箭头函数的形式
- plus = () => {
- this.num += 1;
- };
- @action
- minus = () => {
- this.num -= 1;
- };
- }
- const homeStore = new HomeStore();
- export { homeStore };
- // user
- import { observable,action } from "mobx";
- class UserStore {
- @observable userInfo;
- @observable text;
- constructor() {
- this.userInfo = "123";
- this.text = "Hello,this is UserPage!!!";
- }
- @action
- getListData = () => {
- fetch(`http://yapi.demo.qunar.com/mock/5228/record/list`)
- .then(
- action("fetchRes",res => {
- return res.json();
- })
- )
- .then(
- action("fetchSuccess",data => {
- return (this.userInfo = data);
- })
- )
- .catch(
- action("fetchError",e => {
- console.log(e.message);
- })
- );
- };
- }
- const userStore = new UserStore();
- export { userStore };
4. 通过index文件合并:
- import { homeStore } from "./home";
- import { saleStore } from "./sale";
- import { userStore } from "./user";
- const store = { homeStore,saleStore,userStore };
- export default store;
5. 在组件中使用Mobx:
js目录下新建tabs文件夹,新建HomeScreen.js
- import React,{ Component } from "react";
- import { View,Text,StyleSheet,TouchableOpacity } from "react-native";
- import { connect } from "mobx-react";
- import { observer,inject } from "mobx-react";
- import { Button,Container } from "native-base";
- import Headers from "../common/components/header";
- @inject(["homeStore"]) // 注入对应的store
- @observer // 监听当前组件
- class HomeScreen extends Component {
- constructor(props) {
- super(props);
- this.store = this.props.homeStore; //通过props来导入访问已注入的store
- this.state = {
- };
- }
- render() {
- const { text,num } = this.store;
- return (
- <Container>
- <Headers
- title="首页"
- type='index'
- navigation={this.props.navigation}
- />
- <Text>{text}</Text>
- <Button primary onPress={() => this.store.plus()}>
- <Text>add</Text>
- </Button>
- <Text>{num}</Text>
- <Button primary onPress={() => this.store.minus()}>
- <Text>Minu</Text>
- </Button>
- </Container>
- );
- }
- }
- export default HomeScreen;
- const styles = StyleSheet.create({
- container: {
- flex: 1,justifyContent: "center",alignItems: "center",backgroundColor: "#F5FCFF"
- }
- });
6. 目前组件中还拿不到当前组件的store
,接下来注入store
;
在初始化的项目结构中,项目运行的入口文件是index.js
,注册了同级目录下的App.js
;
- // index.js
- import { AppRegistry } from 'react-native';
- import App from './App';
- AppRegistry.registerComponent('demo',() => App);
由于需要在App.js
上套入store
所以改写结构,
1. js文件夹下新建App.js
touch App.js
可以把根目录下App.js
的内容copy过来,然后删掉根目录下App.js
文件;
2. js目录下新建 setup.js
文件;
- import React from "react";
- import { Provider } from "mobx-react";
- import App from "./App";
- import store from "./store";
- export default function setup() {
- class Root extends React.Component {
- render() {
- return (
- <Provider {...store}>
- <App />
- </Provider>
- );
- }
- }
- return Root;
- }
3. 修改index启动页代码:
- import { AppRegistry } from 'react-native';
- import setup from "./js/setup";
- AppRegistry.registerComponent('******',() => setup());
现在store
已经注入,在每个组件中也可以拿到当前store
的数据了;可以进行代码开发了;