I am building a ionic 2 app and I am using the following component 

<http://ionicframework.com/docs/components/#alert>

```
  import { AlertController } from 'ionic-angular';

export class MyPage {
  constructor(public alertCtrl: AlertController) {
  }

  showAlert() {
    let alert = this.alertCtrl.create({
      title: 'New Friend!',
      subTitle: 'Your friend, Obi wan Kenobi, just accepted your friend request!',
      buttons: ['OK']
    });
    alert.present();
  }
}

```

How can I make sure that when I click outside the box the alert is not dismissed?