无法识别角度材料模块

Question

我在这个错误上浪费了很多时间，我正在启动新的 angular5 项目，我想使用角度材料。我在 material.module.ts 文件中导入和导出了材料模块：

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { CommonModule } from '@angular/common';
import { MatIconModule,MatButtonModule,MatSidenavModule,MatToolbarModule } from '@angular/material';
@NgModule({
  imports: [
    BrowserModule,
    CommonModule,
    MatIconModule,
    MatButtonModule,
    MatSidenavModule,
    MatToolbarModule,
  ],
  exports: [
    MatIconModule,
    MatButtonModule,
    MatSidenavModule,
    MatToolbarModule
  ],
  declarations: []
})
export class MaterialModule { }

然后我在app.module中导入了material.module：

import { BrowserModule } from '@angular/platform-browser';
import { CommonModule } from '@angular/common';
import { NgModule } from '@angular/core';
import { FormsModule } from '@angular/forms';
import { HttpModule } from '@angular/http';
import { AppComponent } from './app.component';
import { AppRoutingModule } from './app-routing.module';
import { FlexLayoutModule } from "@angular/flex-layout";
import { MasterPageModule } from './master-page/master-page.module';
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
import { MaterialModule } from './material.module';
@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule,
    CommonModule,
    AppRoutingModule,
    FormsModule,
    HttpModule,
    BrowserAnimationsModule,
    FlexLayoutModule,
    MasterPageModule,
    MaterialModule
  ],
  providers: [],
  bootstrap: [AppComponent],
})
export class AppModule { }

当我尝试使用时，<mat-toolbar> </mat-toolbar> I出现常见错误：

Template parse errors:'mat-toolbar' is not a known element:
1. If 'mat-toolbar' is an Angular component, then verify that it is part of this module.
2. If 'mat-toolbar' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message.

更新 包。杰森

{
  "name": "front-end-app",
  "version": "0.0.0",
  "license": "MIT",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build --prod",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "^5.2.9",
    "@angular/cdk": "^5.2.4",
    "@angular/common": "^5.2.0",
    "@angular/compiler": "^5.2.0",
    "@angular/core": "^5.2.0",
    "@angular/flex-layout": "^5.0.0-beta.14",
    "@angular/forms": "^5.2.0",
    "@angular/http": "^5.2.0",
    "@angular/material": "^5.2.4",
    "@angular/platform-browser": "^5.2.0",
    "@angular/platform-browser-dynamic": "^5.2.0",
    "@angular/router": "^5.2.0",
    "core-js": "^2.4.1",
    "hammerjs": "^2.0.8",
    "rxjs": "^5.5.6",
    "zone.js": "^0.8.19"
  },
  "devDependencies": {
    "@angular/cli": "~1.7.4",
    "@angular/compiler-cli": "^5.2.0",
    "@angular/language-service": "^5.2.0",
    "@types/jasmine": "~2.8.3",
    "@types/jasminewd2": "~2.0.2",
    "@types/node": "~6.0.60",
    "codelyzer": "^4.0.1",
    "jasmine-core": "~2.8.0",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "~2.0.0",
    "karma-chrome-launcher": "~2.2.0",
    "karma-coverage-istanbul-reporter": "^1.2.1",
    "karma-jasmine": "~1.1.0",
    "karma-jasmine-html-reporter": "^0.2.2",
    "protractor": "~5.1.2",
    "ts-node": "~4.1.0",
    "tslint": "~5.9.1",
    "typescript": "~2.5.3"
  }
}

我看不出错误在哪里！ 任何帮助将不胜感激。

Answer 1

必须在使用材质组件的每个模块中导入MaterialModule。

这意味着，如果MasterPageModule中的一个组件使用 <mat-toolbar> ，您还必须在该模块中导入材质模块。仅仅在app.module中导入是不够的.

也不要在MaterialModule中导入BrowserModule。改为导入CommonModule。有关详细说明，请参阅文档。

不要在任何其他模块中导入浏览器模块。功能模块和延迟加载的模块应改为导入 CommonModule。他们需要共同的指令。他们不需要重新安装应用范围的提供程序。

有关详细说明，请参阅文档。