vuejs事件中心管理组件间的通信详解

import Vue from 'Vue'
window.eventHub = new Vue();

 //hook 
 created: function () {
 //listen event
 window.eventHub.$on('switchComments',this.switchComments);
 window.eventHub.$on('removeIssue',this.removeIssue);
 window.eventHub.$on('saveComment',this.saveComment);
 window.eventHub.$on('removeComment',this.removeComment);

 //get init data
 var that =this;
 axios.get('issue/index')
 .then(function (resp) {
  that.issue_list=resp.data;
 });
 },
 beforeDestroy: function () {
 window.eventHub.$off('switchComments');
 window.eventHub.$off('removeIssue');
 window.eventHub.$off('saveComment');
 window.eventHub.$off('removeComment');
 }

 methods: {
 removeComment: function(index,cindex) {
  window.eventHub.$emit('removeComment', {index:index, cindex:cindex});
 },
 saveComment: function(index) {
  window.eventHub.$emit('saveComment', {index: index, comment: this.comment});
  this.comment="";
 }
 },