空白项目中的 Ionic 4 简单选项卡

Ionic 4 simple tab in blank project

我已经用 ionic start myApp blank

创建了一个新项目

现在我需要在项目中添加选项卡我已经在页面中创建了文件夹选项卡并在选项卡中创建了两个文件tabs.html tabs.ts 在 tabs.html

<ion-tabs>
  <ion-tab [root]="homePage" tabTitle="Home" tabIcon="bulb" ></ion-tab>
  <ion-tab [root]="reclamationsPage" tabTitle="Reclamations" tabIcon="settings"></ion-tab>
</ion-tabs>

在tabs.ts

import { Component } from '@angular/core';
import { ReclamationsPage } from '../reclamations/reclamations';
import { HomePage } from '../home/home';


@Component({
  selector: 'page-tabs',
  templateUrl: 'tabs.html',
})
export class TabsPage {

  reclamationsPage: ReclamationsPage;
  homePage: HomePage;
}

在app.module.ts 我已经添加

declarations: [
    MyApp,
    HomePage,
    LoginPage,
    ReclamationsPage,
    TabsPage
  ],
  imports: [
    BrowserModule,
    HttpModule,
    HttpClientModule,
    IonicModule.forRoot(MyApp)
  ],
  bootstrap: [IonicApp],
  entryComponents: [
    MyApp,
    HomePage,
    LoginPage,
    ReclamationsPage,
    TabsPage
  ],

并且在 app.component.ts 中,我将 rootPage:any 更改为 rootPage:any = TabsPage;

但是当我执行我的代码 ionic serve 时,我在屏幕空白页中注意到图像

离子信息

Ionic:

   ionic (Ionic CLI)  : 4.2.1 (C:\Users\android\AppData\Roaming\npm\node_modules\ionic)
   Ionic Framework    : ionic-angular 3.9.2
   @ionic/app-scripts : 3.2.0

Cordova:

   cordova (Cordova CLI) : 8.1.2 (cordova-lib@8.1.1)
   Cordova Platforms     : android 7.1.1
   Cordova Plugins       : cordova-plugin-ionic-keyboard 2.1.3, cordova-plugin-ionic-webview 2.2.0, (and 8 other plugins)

System:

   Android SDK Tools : 26.1.1 (C:\Users\android\AppData\Local\Android\sdk)
   NodeJS            : v8.12.0 (C:\Program Files\nodejs\node.exe)
   npm               : 6.4.1
   OS                : Windows 10

tabs.html;

<ion-tabs [selectedIndex]="myIndex">
    <ion-tab [root]="tab1Root" tabIcon="star"></ion-tab>
    <ion-tab [root]="tab2Root" tabIcon="home"></ion-tab>
</ion-tabs>

tabs.ts

import { IonicPage, NavController, NavParams } from 'ionic-angular';

@IonicPage()
@Component({
  selector: 'page-tabs',
  templateUrl: 'tabs.html',
})

export class TabsPage{
    tab1Root = 'ReclamationsPage';
    tab2Root = 'HomePage';
    myIndex: number;
}

constructor(public navCtrl: NavController, public navParams: NavParams){
    this.myIndex = navParams.data.tabIndex || 0;
}