Creating a standard notification system with Ionic 2 and Angular 2

Question

Creating a standard notification system with Ionic 2 and Angular 2

Is there a way to display alert messages on every page in an Angular2/Ionic2 application? I want to create a common service to achieve this. Can someone guide me on how to proceed?

I am currently implementing the showAlert() function separately in each '.ts' file as shown below.

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();
  }
}

angular typescript ionic2

Answer 1

Answer №1

When it comes to Alerts, they are more closely linked to views rather than application data. Instead of relying on a service to handle this, using Events might be a simpler solution. Here's how you can integrate this into your app.ts file:

constructor(public events: Events, private alertCtrl: AlertController, ...) {

    // Your code...

    // Subscribe to the event 'alert:presented'
    events.subscribe('alert:presented', (alertData) => {
      this.showAlert(alertData[0]);
    });  
}

// This method is responsible for displaying alerts based on the name provided
public showAlert(name: string) {
  let alert = this.alertCtrl.create({
      title: 'New Friend!',
      subTitle: 'Your friend, ' + name + ', just accepted your friend request!',
      buttons: ['OK']
  });
  alert.present();
}

After setting up the above code in your application, you can trigger an Alert from any other view by simply executing the following:

constructor(public events: Events, ...) { 

}

public yourMethod() {
  this.events.publish('alert:presented', 'Obi wan Kenobi');
}

Answer 2

When it comes to Alerts, they are more closely linked to views rather than application data. Instead of relying on a service to handle this, using Events might be a simpler solution. Here's how you can integrate this into your app.ts file:

constructor(public events: Events, private alertCtrl: AlertController, ...) {

    // Your code...

    // Subscribe to the event 'alert:presented'
    events.subscribe('alert:presented', (alertData) => {
      this.showAlert(alertData[0]);
    });  
}

// This method is responsible for displaying alerts based on the name provided
public showAlert(name: string) {
  let alert = this.alertCtrl.create({
      title: 'New Friend!',
      subTitle: 'Your friend, ' + name + ', just accepted your friend request!',
      buttons: ['OK']
  });
  alert.present();
}

After setting up the above code in your application, you can trigger an Alert from any other view by simply executing the following:

constructor(public events: Events, ...) { 

}

public yourMethod() {
  this.events.publish('alert:presented', 'Obi wan Kenobi');
}

Creating a standard notification system with Ionic 2 and Angular 2

Answer №1

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