ionic 跨页面实时传值

官方文档的调用方式

import { Events } from 'ionic-angular';

constructor(public events: Events) {}

// first page (publish an event when a user is created)
function createUser(user) {
  console.log('User created!')
  events.publish('user:created', user, Date.now());
}

// second page (listen for the user created event)
events.subscribe('user:created', (user, time) => {
  // user and time are the same arguments passed in `events.publish(user, time)`
  console.log('Welcome', user, 'at', time);
    });

Events 有三个方法 分别是：

this.events.publish ()        //注册Events事件
this.events.subscribe()        //调用Eevents事件
this.events.unsubscribe()        //注销Events事件q