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vuex-practice.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
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<meta name="keywords" content="Vue,Vuex,">
<meta name="description" content="Vuex存值、取值的操作">
<meta name="author" content="江矿叔叔.">
<title>Vuex存值、取值的操作</title>
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<article class="main article">
<h1 class="title">Vuex存值、取值的操作</h1>
<section class="info">
<span class="avatar" style="background-image: url(https://joe-10005639.cossh.myqcloud.com/jkbb.jpg);"></span> <a class="name" href="javascript:;">江矿叔叔.</a>
<span class="date" data-time="1505282400"><span class="from"></span></span>
<span class="tags"><a class="tages" href="/tag/Vue/index.html">Vue</a><a class="tages" href="/tag/Vuex/index.html">Vuex</a></span>
</section>
<article class="content"><h2>传值</h2>
<pre><code class="language-js">// 定义参数
let params = {
workItemId: 1,
flowInstId: 21,
itemStatus: false,
type: type,
srcId: srcId
}
// 保存参数
this.$store.dispatch('approvalParams', params);
</code></pre>
<ul>
<li>index.js</li>
</ul>
<pre><code class="language-js">
import Vue from 'vue'
import Vuex from 'vuex'
import actions from './actions'
import mutations from './mutations'
Vue.use(Vuex);
export default new Vuex.Store({
modules:{
mutations
},
actions
});
</code></pre>
<ul>
<li>types.js</li>
</ul>
<pre><code class="language-js">// 审批历史页请求参数
export const APPROVAL_HISTORY_PARAMS = 'APPROVAL_HISTORY_PARAMS';
</code></pre>
<ul>
<li>actions.js</li>
</ul>
<pre><code class="language-js">// 引入 状态(类型),用于提交到mutations
import * as types from './types'
// 导出
export default {
// 保存 请求参数 approvalHistoryParams为上面的"action名"
approvalHistoryParams: ({commit}, res) => {
// 此处是触发mutation的 STORE_MOVIE_ID为"mutation名"
commit(types.APPROVAL_HISTORY_PARAMS, res);
}
}
</code></pre>
<ul>
<li>mutations.js</li>
</ul>
<pre><code class="language-js">import {
APPROVAL_HISTORY_PARAMS // 审批历史参数
} from './types'
// 引入 getters
import getters from './getters'
// 定义、初始化数据
const state = {
approvalHistoryParams:{}
}
// 定义 mutations
const mutations = {
// 匹配actions通过commit传过来的值,并改变state上的属性的值
// 审批历史页 请求参数
[APPROVAL_HISTORY_PARAMS](state, res){
state.approvalHistoryParams = res; //state.数据名 = data
}
}
// 导出
export default {
state,
mutations,
getters
}
</code></pre>
<ul>
<li>getters.js</li>
</ul>
<pre><code class="language-js">// 导出
export default {
// 获取 审批历史参数
approvalHistoryParams: (state) => {
return state.approvalHistoryParams;
}
}
</code></pre>
<h2>取值</h2>
<pre><code class="language-js">import { mapGetters } from 'vuex';
export default {
computed: {
...mapGetters([//...函数名 使用对象展开运算符将此对象混入到外部对象中
'approvalHistoryParams'
])
},
methods: {
fetchData(){
console.log(this.approvalHistoryParams.name);
}
}
}
</code></pre>
<h2>PS</h2>
<ul>
<li>dispatch</li>
</ul>
<p>异步操作，例如向后台提交数据，写法：<strong>this.$store.dispatch(‘mutations_name’, val)</strong></p>
<ul>
<li>commit</li>
</ul>
<p>同步操作，写法：<strong>this.$store.commit(‘mutations_name’, val)</strong></p>
</article>
<section class="author">
<div class="avatar" style="background-image: url(https://joe-10005639.cossh.myqcloud.com/jkbb.jpg);"></div>
<a class="name" href="javascript:;">江矿叔叔.</a>
<div class="intro">前(台)端(菜), 喜欢钻研新技术.</div>
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