DEV Community

loading...
Cover image for Ionic Master Detail view

Ionic Master Detail view

dailydevtips1 profile image Chris Bongers Originally published at daily-dev-tips.com ・3 min read

Yesterday we added API results to our Ionic app, let's see how we can introduce a detail view to this.

Meaning someone should be able to click on a specific card which should open up a detail screen with more information.

The end result will look like this:

Ionic master detail view

Adding the detail page

Let's start by generating this detail page.

ng g page detail
Enter fullscreen mode Exit fullscreen mode

Now let's make sure it's accessible as a sub route under our tab2.page.
Let's open up tab2-routing.module.ts and add the newly created route under a :id parameter.

const routes: Routes = [
  {
    path: '',
    component: Tab2Page,
  },
  {
    path: ':id',
    loadChildren: () => import('../detail/detail.module').then(m => m.DetailPageModule)
  }
];
Enter fullscreen mode Exit fullscreen mode

This will make sure we can access the route under the following url: tabs/tab2/:id.

While we are at tab2 let's also add the link to the route.
Open up tab2.page.html and add a routerLink to the image.

<img [routerLink]="card.id" [src]="card.imageUrl" [title]="card.name">
Enter fullscreen mode Exit fullscreen mode

This will now navigate to the detail page, but there isn't much to see yet.

Retrieving the data on the detail page

It's possible to send the data along, but imagine someone closing the app on the detail page, the in store cache might get lost and we have now ID of knowing what card they are looking at.

Because of this we will perform an API request based on the ID, it is however a good practice to cache this locally using localStorage for instance.

Open up the detail.page.ts file.

export class DetailPage {
  card: Card;
  constructor(private cardService: CardService, private route: ActivatedRoute) { }

  ionViewWillEnter() {
    let id:string = this.route.snapshot.paramMap.get('id');
    this.cardService.get(id).then((card: Card) => this.card = card);
  }
}
Enter fullscreen mode Exit fullscreen mode

We add a local card reference, which will be available for the HTML, then we inject our cardService and the Router.

We use the view will enter to load the data in the right time.
Then we first retrieve the ID of the card from the URL, and pass that to the cardService get function. This will return a card which we update our local reference with.

You might be thinking, but we don't have this get method yet and you are right! So let's open up the card.service.ts and add this method:

get(id: string): Promise<Card> {
    return PokemonTCG.Card.find(id);
}
Enter fullscreen mode Exit fullscreen mode

Allright, now all we need to do is render the HTML for the detail page.

<ion-header>
  <ion-toolbar>
    <ion-title>{{card?.name}}</ion-title>
    <ion-buttons slot="start">
      <ion-back-button defaultHref="/"></ion-back-button>
    </ion-buttons>
  </ion-toolbar>
</ion-header>

<ion-content>
  <ion-card>
    <ion-card-header>
      <ion-card-subtitle>{{ card?.supertype }} - {{ card?.subtype }}</ion-card-subtitle>
      <ion-card-title>{{ card?.name }}</ion-card-title>
    </ion-card-header>

    <ion-card-content>
      <h4>{{ card?.ability?.name }}</h4>
      <p>{{ card?.ability?.text }}</p>
    </ion-card-content>
  </ion-card>
</ion-content>
Enter fullscreen mode Exit fullscreen mode

As you can see we use elements like card?.property the question mark will make sure the element is available.
Else we might get errors saying something like: Trying to get property of undefined.

With this in place you have the detail page setup.

Ionic detail page

You can find today's code on the following GitHub Repo.

Thank you for reading, and let's connect!

Thank you for reading my blog. Feel free to subscribe to my email newsletter and connect on Facebook or Twitter

Discussion (0)

pic
Editor guide