Ionic not updating

Ionic Framework ionic-v3
1

hello
my ionic view ngfor not updating after push a new element to array

2

impossible, show us some code

3 
export class NotiPage {
     @Input() search: string = "";
     homePage: Component;
     category: any;
     members2:any[]=[];
     assets: FirebaseListObservable<any>;     
   constructor(public navCtrl: NavController,  public navParams: NavParams, private modalCtrl : ModalController, private zone: NgZone,public angFire: AngularFireDatabase, public loadingCtrl:LoadingController, public alert: AlertController) {
       
}
ionViewDidEnter(){
  this.assets=  this.angFire.list('/date/noti');
  this.assets.subscribe(snapshots=>{ 
    if(snapshots.length > 0){
 
        for(let i =0 ; i < snapshots.length ; i++){
          this.members2.push(snapshots[i]); 
    }
  
    }});
}

html code


<ion-navbar>
      <ion-buttons left>
          <button color="danger" ion-button icon menuToggle>
          <ion-icon name="menu"></ion-icon></button>
      </ion-buttons>
      <ion-title>noti</ion-title>
    </ion-navbar>
  
  </ion-header>
  
  <ion-content padding>
  
  
   <ion-list>
      <ion-item *ngFor=" let item of members2" text-wrap end>
        <ion-thumbnail item-left>
          <img  src="./assets/images/18.jpg" />
        </ion-thumbnail>
        <h2>{{item.title}}</h2>
        <p>
          <span>{{item.mass}}</span>
          <br>
          <span>{{item.time}}</span>
        </p>
      
      </ion-item>
  
    </ion-list>
  </ion-content>
4

maybe you are not pushing anything
try

console.log(this.members2)

after this:

for(let i =0 ; i < snapshots.length ; i++){
          this.members2.push(snapshots[i]); 
    }
5

i tried it and get data

6

so maybe this:

console.log(this.members2)
for(let i =0 ; i < snapshots.length ; i++){
          console.log(snapshots[i];
          this.members2.push(snapshots[i]); 
    }
console.log(this.members2)