角度 – 离子卡不是已知的元素

发布时间：2020-12-17 07:16:07 所属栏目：安全来源：网络整理

导读：我是角度和离子的新手.我在用 “@ angular / forms”：“^ 4.3.1” “ionic-angular”：“^ 3.5.3” 我已经安装了ionic-angular和@ angular / forms包.我收到以下错误消息. Unhandled Promise rejection: Template parse errors:'ion-card-header' is not a

我是角度和离子的新手.我在用
“@ angular / forms”：“^ 4.3.1”
“ionic-angular”：“^ 3.5.3”
我已经安装了ionic-angular和@ angular / forms包.我收到以下错误消息.

Unhandled Promise rejection: Template parse errors:
'ion-card-header' is not a known element:
1. If 'ion-card-header' is an Angular component,then verify that it is part of this module.
2. If 'ion-card-header' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message. ("

      <ion-card>
        [ERROR ->]<ion-card-header>
          Header
        </ion-card-header>

任何想法如何修复将非常感激.

Code that I have with me. both ts and html files

我已经把它放入了,它也开始抱怨.请看下面的图片.

screen shot of the errors received

当我运行“离子信息”.我在终端上收到以下消息.

$ionic info
[WARN] You are not in an Ionic project directory. Project context may be
       missing.

global packages:

    @ionic/cli-utils : 1.5.0
    Ionic CLI        : 3.5.0

System:

    Node       : v6.11.1
    OS         : Windows 10
    Xcode      : not installed
    ios-deploy : not installed
    ios-sim    : not installed
    npm        : 3.10.10

我基本上正在创建一个库,我将需要所有组件,然后我将在一个单独的项目中使用这些组件.

"dependencies": {
    "@angular/forms": "^4.3.1","ionic-angular": "^3.5.3","ionicons": "^3.0.0"
  },"peerDependencies": {
    "@angular/common": "^4.0.0","@angular/core": "^4.0.0"
  },"devDependencies": {
    "@angular/common": "^4.0.0","@angular/compiler": "^4.0.0","@angular/compiler-cli": "^4.0.0","@angular/core": "^4.0.0","@angular/platform-browser": "^4.0.0","@angular/platform-browser-dynamic": "^4.0.0","@compodoc/compodoc": "^1.0.0-beta.9","@types/jasmine": "^2.5.47","@types/karma": "^0.13.35","@types/node": "^7.0.18","@types/webpack": "^2.2.15","@types/webpack-env": "^1.13.0","angular2-template-loader": "^0.6.2","awesome-typescript-loader": "^3.1.3","codecov": "^2.2.0","codelyzer": "^3.0.1","concurrently": "^3.4.0","css-loader": "^0.28.1","gh-pages": "^1.0.0","gulp": "^3.9.1","gulp-inline-ng2-template": "^4.0.0","istanbul-instrumenter-loader": "^2.0.0","jasmine-core": "^2.6.1","json-loader": "^0.5.4","karma": "^1.7.0","karma-chrome-launcher": "^2.1.1","karma-coverage-istanbul-reporter": "^1.2.1","karma-jasmine": "^1.1.0","karma-mocha-reporter": "^2.2.3","karma-sourcemap-loader": "^0.3.7","karma-webpack": "^2.0.3","node-sass": "^4.5.2","raw-loader": "^0.5.1","rimraf": "2.6.1","rxjs": "^5.3.1","sass-loader": "^6.0.5","source-map-explorer": "^1.3.3","to-string-loader": "^1.1.5","ts-node": "^3.0.4","tslint": "^5.2.0","typescript": "2.4.0","webpack": "^2.5.1","webpack-angular-externals": "^1.0.2","webpack-rxjs-externals": "^1.0.0","zone.js": "^0.8.10"
  }

我是离子和棱角分明的新手.

解决方法

从上面的代码中,您错过了关闭离子卡.

<ion-card>

  <ion-card-header>

  </ion-card-header>

</ion-card>

更新1：

我在您的代码中看到的问题数量,

选择器应与.ts文件同名

@Component({
 selector: 'ionic-test.component',templateUrl: 'ionic-test.component.html'
})

确保您的组件标签在离子内容中.例如,

<ion-content>

  <ion-grid>
   <ion-row> </ion-row>
   <ion-row> </ion-row>
  </ion-grid>

  <ion-card>
   <ion-card-header>

   </ion-card-header>
  </ion-card>

</ion-content>

尝试将.scss移动到ion-content并将.scss名称更改为其他名称.

<ion-content class="ionic-test.component.styles">

</ion-content>

还要确保.ts,.html,.scss文件位于同一根文件夹中

更新2：

根据您最近的编辑可能出现的问题,

>您没有创建包含所有库的node_modules文件夹,请转到终端中的项目根目录并运行以下命令.它将安装package.json文件中的所有模块.

npm安装

注意：要查看是否安装了package.json文件中的节点模块,只需运行以下命令,方法是转到终端中的项目根目录

npm info

>创建离子项目时,您没有按照正确的步骤操作,按照ionic documentation的步骤操作,并按照概述创建一个新项目,看它是否正常工作

（编辑：李大同）

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