1.添加插件

ionic plugin add cordova-plugin-network-information

npm install --save @ionic-native/network

2. 导入文件并声明。

import { Network } from '@ionic-native/network';

export class PageName {

constructor (public network :Network){}

ionViewDidEnter(){

this.network.onConnect().subscribe(data => console.log(data),error => console.error(error));

this.network.onDisconnect().subscribe(data => console.log(data),error => console.error(error));

}}