Ionic 4 動態產生多 sliders

import {Component, OnInit, ViewChild, ViewChildren, QueryList} from '@angular/core';
import {AlertController, IonSlides, ModalController} from '@ionic/angular’;

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@ViewChildren('sliders') sliders: QueryList<IonSlides>;

<ion-slides pager="true" [options]="slideOpts" #sliders (click)="showMember(member)">

slideNext(key) {
    const slideArray = this.sliders.toArray();

    slideArray[key].getActiveIndex().then((res: any) => {
        let index = res + 1;
        if (index > (this.members[key].photos.length)) {
            index = 1;
        }

        slideArray[key].slideTo(index);
    });
}