意外值''由模块导入''.请添加@NgModule注释

Question

我正在做这个教程:https://youtu.be/qs2n_poLarc？list = WL,我正在尝试学习离子框架.

问题是教程(从我读到的)有点过时了.视频的作者使用了import { HttpModule } from "@angular/http,但我在StackOverflow上读到了我应该使用的内容import { HttpClient } from "@angular/common/http";.

问题是,当我尝试编译代码时,我得到了这个错误:Unexpected value 'HttpClient' imported by the module 'AppModule'. Please add a @NgModule annotation..现在我不知道我应该在哪里添加它,因为我app.module.ts看起来像这样:

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

import { AboutPage } from "../pages/about/about";
import { ContactPage } from "../pages/contact/contact";
import { HomePage } from "../pages/home/home";
import { TabsPage } from "../pages/tabs/tabs";
import { SettingsPage } from "../pages/settings/settings";

import { StatusBar } from "@ionic-native/status-bar";
import { SplashScreen } from "@ionic-native/splash-screen";
import { WeatherProvider } from "../providers/weather/weather";

@NgModule({
  declarations: [
    MyApp,
    AboutPage,
    ContactPage,
    HomePage,
    TabsPage,
    SettingsPage
  ],
  imports: [BrowserModule, IonicModule.forRoot(MyApp), HttpClient], //Added it right here
  bootstrap: [IonicApp],
  entryComponents: [
    MyApp,
    AboutPage,
    ContactPage,
    HomePage,
    TabsPage,
    SettingsPage
  ],
  providers: [
    StatusBar,
    SplashScreen,
    { provide: ErrorHandler, useClass: IonicErrorHandler },
    WeatherProvider,
    HttpClient
  ]
})
export class AppModule {}

知道我在这里缺少什么吗？我找到了这个答案,但我找不到那里的解决方案.

Answer 1

这意味着它无法将其识别为模块。尝试这个：

import {HttpClientModule} from '@angular/common/http';

Answer 2

应该是HttpClientModule更改

从

imports: [BrowserModule, IonicModule.forRoot(MyApp), HttpClient],

至

imports: [BrowserModule, IonicModule.forRoot(MyApp), HttpClientModule],

确保您已添加

import { HttpClientModule, HttpClient } from '@angular/common/http';