title: How to set "dots" loader when API loads a response in ionic 2?
body: <p>I am in ionic 2 application ,i can add spinner on html page as <code>&lt;ion-spinner name="dots"&gt;&lt;/ion-spinner&gt;</code> but want to set "dots" Spinner during awaiting time of API response.</p>
  
  <p>current response waiting loader code is :</p>
  
  <pre><code> fnPresentLoading() {
       this.loading = this.loadingCtrl.create({
       content: 'Please wait...'
       });
     this.loading.present();
  </code></pre>
  
  <p>anyone have idea ??
  Currently it  showing default spinner .  </p>