Ionic4--上拉下拉

1、ion-infinite-scroll 上拉分頁加載更多

<ion-content> 
	<ion-list>
		<ion-item *ngFor="let item of data"> {{item}}</ion-item> 
         </ion-list>
	<ion-infinite-scroll #myInfiniteScroll threshold="100px"(ionInfinite)="loadData($event)"> 
    	<ion-infinite-scroll-content loadingSpinner="bubbles" loadingText="Loading more data..."> 
    	</ion-infinite-scroll-content>
	</ion-infinite-scroll> 
</ion-content>

2、ion-refresher 下拉更新

<ion-content>
	<ion-refresher slot="fixed" (ionRefresh)="doRefresh($event)">
		<ion-refresher-content pullingIcon="arrow-dropdown" pullingText="Pull to refresh" refreshingSpinner="circles" refreshingText="Refreshing...">
		</ion-refresher-content> 
        </ion-refresher>
</ion-content>