在iOS上使用Firestore的Ionic 5可向上滚动新数据

npm install -g @ionic/cli
npm install firebase @angular/fire

ionic start myApp blank
cd myApp

import { AngularFireModule } from '@angular/fire';
import { AngularFirestoreModule } from '@angular/fire/firestore';

const firebaseConfig = {
  // 在这里添加你的Firestore配置信息
};

@NgModule({
  imports: [
    // ...
    AngularFireModule.initializeApp(firebaseConfig),
    AngularFirestoreModule
  ],
  // ...
})
export class AppModule { }

import { Component } from '@angular/core';
import { AngularFirestore } from '@angular/fire/firestore';

@Component({
  selector: 'app-home',
  templateUrl: 'home.page.html',
  styleUrls: ['home.page.scss'],
})
export class HomePage {
  items: any[];

  constructor(private firestore: AngularFirestore) {
    this.items = [];
    this.loadItems();
  }

  loadItems() {
    this.firestore.collection('items', ref => ref.orderBy('timestamp', 'desc')).valueChanges().subscribe(data => {
      this.items = data;
    });
  }
}