ionic2-Toast

showFill(){}裏面放以下的內容，顯示toast
首先
import {NavController,LoadingController,AlertController,ToastController} from 'ionic-angular';
 constructor( private toastCtrl: ToastController) {
  	
  }
let toast=this.toastCtrl.create({
      message:"請填寫內容",
      duration:3000,
      position:"middle"
      });
    toast.onDidDismiss(() =>{
      console.log("has dismissed");
      });
    toast.present();