The Ionic 2 slider seems to be malfunctioning as it is undefined and the options

Having a major issue with my Ionic 2 slider (ion-slide).

Here is my code:

Typescript:

import { Component, ViewChild } from '@angular/core';
import { NavController, NavParams, Slides } from 'ionic-angular';

@Component({
  templateUrl: 'page.html'
})
export class WorkoutStartPage {
    @ViewChild('mySlider') mySlider:Slides;

    public itemList: Array<any>;
    public _options: any;


  constructor(public navCtrl: NavController, public navParams: NavParams, public appData: AppData) {
      console.log(this.mySlider); // undefined

      this._options = {
          slidesPerView:2.5,
          pager: false,
          speed: 800,
          autoplay: 5000,
          effect: 'fade',
          fade: {
              crossFade: true
          },
          loop: 'true',
          autoplayDisableOnInteraction: false
      }

    }

  ionViewDidLoad() {
    this.appData.getItems().then((items:Array<any>) => {
        this.itemList = items;
    });
  }
}

My template:

<ion-content id="page-workout-start">

    <div class="c-headline c-headline--has-padding animated fadeIn">Title</div>

    <div *ngIf="itemList">
        <ion-slides class="c-item-list-slider animated fadeIn" [options]="_options" mySlider>
            <ion-slide *ngFor="let item of itemList">
                <div class="header-with-background">
                    <img src="{{item.image}}">
                    <div class="img-overlay animated fadeIn">
                        <h1 [innerHTML]="item.title"></h1>
                    </div>
                </div>
                <p>{{item.infos}}</p>
            </ion-slide>
        </ion-slides>
    </div>

</ion-content>

The Issue

The ion slider is not taking the _options and "

@ViewChild('mySlider') mySlider:Slides;
" is also undefined.

Any idea why this might not be working?

Thank you!

Answer №1

When working with Angular, make sure to declare template variables using #variableName. In this case, you'll need to change mySlider to #mySlider within the ion-slides tag.

Remember that the property this.mySlider should be assigned the value of #mySlider after content initialization. It will be undefined in the constructor otherwise.

To access your slider component, use the ngAfterContentInit lifecycle hook.

If you're using the recently released Ionic 2, take a look at the updated documentation for the Slides API as it has undergone significant changes.

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