离子卡不是已知的元素

Question

我是角度和离子的新手.我正在使用
"@ 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.

我已经把它放入了,它也开始抱怨.请看下面的图片.

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.

Answer 1

从上面的代码来看，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，

选择器应与您的.ts文件同名

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

确保您的组件标签位于ion-content内。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 移至ion-content并将 .scss 名称更改为其他名称。

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

</ion-content>

另请确保.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，可能出现问题的地方，

1. 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 install

注意：要查看是否安装了 package.json 文件中的节点模块，只需在终端中转到项目根目录运行以下命令

 npm info

2. 创建 ionic 项目时，您没有遵循正确的步骤，请按照ionic 文档中的步骤操作，并按照概述创建一个新项目，看看它是否正常工作