Question

Ionic4项目中我们可以使用Ionic4提示框组件ion-toast-controller对项目进行布局。

ion-toast-controller官方文档地址:https://ionicframework.com/docs/api/toast-controller

ToastController is a component used to create Toast components. Please see the docs for Toast.

ion-toast-controller　内置方法(Methods)

create
Description	Create a toast overlay with toast options.
Signature	create(options?: ToastOptions | undefined) => Promise<HTMLIonToastElement>
dismiss
Description	Dismiss the open toast overlay.
Signature	dismiss(data?: any, role?: string | undefined, id?: string | undefined) => Promise<boolean>
getTop
Description	Get the most recently opened toast overlay.
Signature	getTop() => Promise<HTMLIonToastElement | undefined>