Problem trying to get values from my API ionic 4

Ionic Framework
1

I’m trying to get the values from my API but I can’t show the in ion-list.
In the image you can see that the data is loaded but I can’t show them in ion-list

Anotaci%C3%B3n%202019-03-02%20160843
Anotación 2019-03-02 160843.jpg1517×818 169 KB

I try tho show the in this way

<ion-list>
    <ion-item *ngFor="let item of (results | async)">

      <ion-label text-wrap>{{item.nombreProducto}}</ion-label>
      <ion-button color="light"><img src="../../assets/icon/binoculars.png" alt="" (click)="presentarModal()" item-end></ion-button>
      <ion-button color="light"><img src="../../assets/icon/cart.png" alt="" (click)="addCart()" item-end></ion-button>
    </ion-item>
  </ion-list>

I’ve created a service that have a method called getAll

getAll(): Observable<any>{
return this.http.get(`${this.url}`).pipe(
  map(results=>{
    console.log('Data', results);
    return results['Data'];
  })
);

And in my home.page.ts the getAll method contain this

getAll(){
  this.results = this.productService.getAll();
}

What i’m doing wrong?