Ionic2 未兑现的承诺

Question

我目前正在 Ionic2 中学习 Angular2 的相关知识。 我正在阅读一个有点过时的教程，并且由于我不是 100% 熟悉 Angular2 环境，因此我无法调试此错误：

Uncaught (in promise): Error: No component factory found for ReposPage. Did you add it to @NgModule.entryComponents? Error: No component factory found for ReposPage. Did you add it to @NgModule.entryComponents? at noComponentFactoryError

这些是我从干净的 ionic2 安装中更改的文件：

app.component.ts

import { Component, ViewChild } from '@angular/core';

import { Platform, MenuController, Nav } from 'ionic-angular';

import { HelloIonicPage } from '../pages/hello-ionic/hello-ionic';
import { ListPage } from '../pages/list/list';

import { UsersPage } from '../pages/users/users';
import { ReposPage } from '../pages/repos/repos';
import { OrganisationsPage } from '../pages/organisations/organisations';

import { StatusBar } from '@ionic-native/status-bar';
import { SplashScreen } from '@ionic-native/splash-screen';


@Component({
  templateUrl: 'app.html'
})
export class MyApp {
  @ViewChild(Nav) nav: Nav;

  // make HelloIonicPage the root (or first) page
  rootPage = HelloIonicPage;
  pages: Array<{title: string, component: any}>;

  constructor(
    public platform: Platform,
    public menu: MenuController,
    public statusBar: StatusBar,
    public splashScreen: SplashScreen
  ) {
    this.initializeApp();

    // set our app's pages
    this.pages = [
      { title: 'Users', component: UsersPage },
      { title: 'Repos', component: ReposPage },
      { title: 'Organisations', component: OrganisationsPage },
      { title: 'Hello Ionic', component: HelloIonicPage },
      { title: 'My First List', component: ListPage }
    ];
  }

  initializeApp() {
    this.platform.ready().then(() => {
      // Okay, so the platform is ready and our plugins are available.
      // Here you can do any higher level native things you might need.
      this.statusBar.styleDefault();
      this.splashScreen.hide();
    });
  }

  openPage(page) {
    // close the menu when clicking a link from the menu
    this.menu.close();
    // navigate to the new page if it is not the current page
    this.nav.setRoot(page.component);
  }
}

app.module.ts

import { BrowserModule } from '@angular/platform-browser';
import { NgModule, ErrorHandler } from '@angular/core';
import { IonicApp, IonicModule, IonicErrorHandler } from 'ionic-angular';
import { MyApp } from './app.component';

import { HelloIonicPage } from '../pages/hello-ionic/hello-ionic';
import { ItemDetailsPage } from '../pages/item-details/item-details';
import { ListPage } from '../pages/list/list';

import { StatusBar } from '@ionic-native/status-bar';
import { SplashScreen } from '@ionic-native/splash-screen';

@NgModule({
  declarations: [
    MyApp,
    HelloIonicPage,
    ItemDetailsPage,
    ListPage
  ],
  imports: [
    BrowserModule,
    IonicModule.forRoot(MyApp),
  ],
  bootstrap: [IonicApp],
  entryComponents: [
    MyApp,
    HelloIonicPage,
    ItemDetailsPage,
    ListPage
  ],
  providers: [
    StatusBar,
    SplashScreen,
    {provide: ErrorHandler, useClass: IonicErrorHandler}
  ]
})
export class AppModule {}

我还通过ionic g page命令创建了3个页面。

如有任何关于此问题的帮助，我们将不胜感激。

Answer 1

您需要在 app.module.ts 中的 ngModule 中包含 ReposPage。 它应该出现在声明和 entryComponents 数组中。

@NgModule({
  declarations: [
    MyApp,
    HelloIonicPage,
    ItemDetailsPage,
    ListPage,
    ReposPage //here
  ],
  imports: [
    BrowserModule,
    IonicModule.forRoot(MyApp),
  ],
  bootstrap: [IonicApp],
  entryComponents: [
    MyApp,
    HelloIonicPage,
    ItemDetailsPage,
    ListPage,
    ReposPage //here
  ],

Answer 2

正如错误消息中明确指出的，您需要将“ReposPage”添加到 app.modules.ts 文件中的 entryComponents 数组中。您还需要将其添加为声明。

声明：[ 我的应用程序， 你好IonicPage， 项目详情页面， 列表页， 回购页面 ]

入口组件：[ 我的应用程序， 你好IonicPage， 项目详情页面， 列表页， 回购页面 ]