angular - Know when http requests are finished from provider in Angular2 -

i created provider this:

import {injectable, provider, inject} 'angular2/core'; import {http, response, headers} 'angular2/http'; import {platform, storage, sqlstorage,localstorage} "ionic-angular";   @injectable() export class myprovider {       constructor(@inject(platform)platform,@inject(http)http) {             this.http = http;     }       getsomeotherstuff() {              var headers = new headers();             headers.append('content-type', 'application/x-www-form-urlencoded');              this.http.post(                         'http://localhost:3000/getotherstuff',                         {headers: headers}                     ).map(                         (res:response)=>res.json())                         .subscribe(                             (response) => {                                 //my response can used                              },                             (err) => {                              },                             () => {                              }                         ); //end of subscribe      }        getsomestuff() {              var headers = new headers();             headers.append('content-type', 'application/x-www-form-urlencoded');              this.http.post(                         'http://localhost:3000/getstuff',                         {headers: headers}                     ).map(                         (res:response)=>res.json())                         .subscribe(                             (response) => {                                 //my response can used                              },                             (err) => {                              },                             () => {                              }                         ); //end of subscribe      } 

i have page. inside of page when user comes call provider getstuff() , getotherstuff() functions data. while data loading little spinner should show, when requests finish page should know this.

@page({     templateurl: 'build/pages/mypage/mypage.html',     providers: [myprovider] })  export class mypage {     isloadingspinner = false;      constructor(_providermessages: providermessages) {         //when page come upon data getstuff , getothersstuff.        // when loads should go these 2 varaibles displayed on page.         isloadingspinner = true; //page laoding show spinner         this.first_data = //getstuff provider when loaded        this.second_data = //getotherstuff provider when loaded         isloadingspinner = false; //page done loading           }      }  } 

essentially page display data when loaded, when still waiting response should able capture state show spinner

provider

@injectable() export class myprovider {    constructor(@inject(platform)platform, @inject(http) http) {     this.http = http;   }    getsomeotherstuff() {      var headers = new headers();     headers.append('content-type', 'application/x-www-form-urlencoded');      return this.http.post(       'http://localhost:3000/getotherstuff',       {headers: headers}     ).map((res: response)=>res.json());    }    getsomestuff() {      var headers = new headers();     headers.append('content-type', 'application/x-www-form-urlencoded');      return this.http.post(       'http://localhost:3000/getstuff',       {headers: headers}).map((res: response)=>res.json());    } } 

component

@page({   templateurl: 'build/pages/mypage/mypage.html',   providers: [myprovider] })  export class mypage {    completedrequests = 0;   isloadingspinner = true;    constructor(_providermessages: providermessages, private dataservice: myprovider) {      //when page come upon data getstuff , getothersstuff.     // when loads should go these 2 varaibles displayed on page.      this.dataservice.getsomestuff().subscribe(       (data)=> {         this.first_data = //getstuff provider when loaded},           this.completedrequests++;       },       (err) => {       },       () => {         if(this.completedrequests == 2) {           isloadingspinner = false;         } //page done loading       }); //end      this.dataservice.getsomeotherstuff().subscribe(       (data)=> {         this.second_data = //getotherstuff provider when loaded           this.completedrequests++;       },       (err) => {       },       () => {         if(this.completedrequests == 2) {           isloadingspinner = false;         } //page done loading       }     )    } } 

template (mypage.html)

<div class="container-of-everything" *ngif="!isloadingspinner">   <!-- stuff goes here --> </div>  <div class="spinner spinning" *ngif="isloadingspinner"> </div>