import { PopoverEdit } from '../../pages/popover-edit';

// ...

	public presentPopover(event): void {
        console.log(this.navParams.get('id'));
        let popover = this.popoverCtrl.create(PopoverEdit, {id: this.navParams.get('id')});

        popover.present({
            ev: event
        });
    }

// ...


<ion-list>
    <ion-list-header>Gérer</ion-list-header>
    <button ion-item (tap)="editOffer(id)"><span>Ajouter</span></button>
</ion-list>