VUE使用vuex解决模块间传值问题的方法

<template>
 <div id="login">
 <c-header></c-header>
 <c-form></c-form>
 <p class="content-block"><a href="javascript:;" rel="external nofollow" rel="external nofollow" @click=showState class="button button-fill button-success">登录</a></p>
 </div>
</template>

 import Vue from 'vue'
 import Vuex from 'vuex'
 // 首先声明一个状态 state
 const state = {
 msg: ''
 }
 // 然后给 actions 注册一个事件处理函数，当这个函数被触发时，将状态提交到 mutaions中处理
 const actions = {
 saveName({commit}, msg) {
  commit('saveMsg', msg) // 提交到mutations中处理 
 }
 }
 // 更新状态
 const mutations = {
  saveMsg(state, msg) {
  state.msg = msg;
 }
 }
 // 获取状态信息
 const getter = {
 showState(state) {
  console.log(state.msg)
 }
 }


 // 下面这个相当关键了，所有模块，记住是所有，注册才能使用
 export default new Vuex.Store{
 state,
 getter,
 mutations,
 actions
 }

<template>
 <div>
  <input type="text" @blur=saveName(username) v-model="username" placeholder="Your name">
 </div>
</template>

<script type="text/javascript">
 // 引入mapActions，很重要
 import { mapActions } from 'vuex'
 export default {
 data() {
  return {
  username:'',
  password: ''
  }
 },
 methods: {
  ...mapActions({
  // 在input 的blur 事件中触发回调，并将输入值作为参数返回到store中
  saveName: 'saveName' 
  })
 }
 }
</script>

<template>
 <div id="login">
 <c-header></c-header>
 <c-form></c-form>
 <p class="content-block"><a href="javascript:;" rel="external nofollow" rel="external nofollow" @click=showState class="button button-fill button-success">登录</a></p>
 </div>
</template>

<script>
// 引入mapGtters，很重要
import { mapGetters } from 'vuex'
 export default {
 methods: {
  ...mapGetters([
  // 在store.js 中注册的getters
  'showState'
  ])
 },
 components: {
  "c-form": require('../components/form.vue'),
  "c-header": require('../components/header.vue')
 }
 }
</script>