CkEditor 和 Angular Material 2 選項卡

Question

我使用 angular-cli、angular-material 2 並嘗試使用 CKEditor (ng2-ckeditor)。

當我直接在 HTML 中（在一個 div 內）插入 CkEditor 時，一切正常。

但是當我在以下結構下移動 CkEditor 代碼時：

<md-tab-group>
    <md-tab label="Another label description">
        Contents 1
    </md-tab>
    <md-tab label="Label description">
      <div>
        <md-card>
          <md-card-header>
            <md-card-title>
              This is a title
            </md-card-title>
          </md-card-header>
          <md-card-content>
            <ckeditor name="htmlTextValue"
                      [(ngModel)]="ckeditorContent"
                      [config]="{uiColor: '#99000'}"
                      (change)="onChange($event)"
                      (ready)="onReady($event)"
                      (focus)="onFocus($event)"
                      (blur)="onBlur($event)"
                      debounce="500">
            </ckeditor>
          </md-card-content>
        </md-card>
      </div>
    </md-tab>
  </md-tab-group>

它失敗了，這是來自控制台的堆棧跟蹤：

ERROR TypeError: Cannot read property 'unselectable' of null
    at b (ckeditor.js:331)
    at a.<anonymous> (ckeditor.js:327)
    at a.m (ckeditor.js:10)
    at a.CKEDITOR.event.CKEDITOR.event.fire (ckeditor.js:12)
    at a.CKEDITOR.editor.CKEDITOR.editor.fire (ckeditor.js:13)
    at a.fireOnce (ckeditor.js:12)
    at a.CKEDITOR.editor.CKEDITOR.editor.fireOnce (ckeditor.js:13)
    at Object.<anonymous> (ckeditor.js:251)
    at e (ckeditor.js:231)
    at Object.load (ckeditor.js:231)

以下是 package.json 中的重要信息：

"dependencies": {
    "@angular/animations": "^4.1.1",
    "@angular/common": "^4.1.1",
    "@angular/compiler": "^4.1.1",
    "@angular/core": "^4.1.1",
    "@angular/forms": "^4.1.1",
    "@angular/http": "^4.1.1",
    "@angular/material": "^2.0.0-beta.3",
    "@angular/platform-browser": "^4.1.1",
    "@angular/platform-browser-dynamic": "^4.1.1",
    "@angular/router": "^4.1.1",
    "core-js": "^2.4.1",
    "hammerjs": "^2.0.8",
    "ng2-ckeditor": "^1.1.8",
    "rxjs": "^5.1.0",
    "zone.js": "^0.8.4"
  },
  "devDependencies": {
    "@angular/cli": "1.0.2",
    "@angular/compiler-cli": "^4.1.1",
    "@types/hammerjs": "^2.0.34",
    "@types/jasmine": "2.5.38",
    "@types/node": "~6.0.60",
    "codelyzer": "~2.0.0",
    "jasmine-core": "~2.5.2",
    "jasmine-spec-reporter": "~3.2.0",
    "karma": "~1.4.1",
    "karma-chrome-launcher": "~2.0.0",
    "karma-cli": "~1.0.1",
    "karma-coverage-istanbul-reporter": "^0.2.0",
    "karma-jasmine": "~1.1.0",
    "karma-jasmine-html-reporter": "^0.2.2",
    "protractor": "~5.1.0",
    "ts-node": "~2.0.0",
    "tslint": "~4.5.0",
    "typescript": "~2.2.0"
  }

這是我的組件代碼：

  ckeditorContent = 'This is a text';

  onChange($event) {
    console.log('Change');
    console.log($event);

  }

  onReady($event) {
    console.log('OnReady');
    console.log($event);

  }

  onFocus($event) {
    console.log('Focus');
    console.log($event);
  }

  onBlur($event) {
    console.log('Blur');
    console.log($event);
  }

我也嘗試了 ckeditor 構建器以添加 divarea 插件，但沒有運氣。

不幸的是，我無法為此創建一個 plunker，因為現在不支持 angular-cli。

你知道為什么嗎？ 提前謝謝你。

Answer 1

我通過使用這個技巧來解決這個問題（臟修復但有效）。

首先，在您的 HTML 模板中裝飾 ckeditor，使其僅在 isVisible() 方法返回 true 時才可見：

<ng-container *ngIf="isVisible()">
    <ckeditor data="" [config]="ckEditorConfig" 
    (dataChange)="newData($event)" debounce="500"></ckeditor>
</ng-container>

然后在您的 TypeScript 中，添加方法 isVisible() 如下。 此方法需要您注入 ElementRef（將其添加到您的組件構造函數中）：

constructor(
  // add this line and import ElementRef:
  // import { ElementRef } from '@angular/core';
  private elementRef: ElementRef
) {
// keep any existing code that exists
}

isVisible(): boolean {
  const element = this.elementRef.nativeElement;
  return element.offsetParent !== null;
}

這樣做，CKEditor 只會在組件可見時被實例化（假設當組件可見時，它已經完成加載）。

請注意，使用 ElementRef 會使您的應用程序更容易受到攻擊（請參閱： https ://angular.io/api/core/ElementRef）