angular - CkEditor 和 Angular Material 2 选项卡

Question

我使用 angular-cli、angular-material 2 并尝试使用 CKEditor (ng2-ckeditor)。

当我将 CkEditor 直接插入 HTML(在一个 div 内)时，一切正常。

但是当我在以下结构下移动 CkEditor 代码时:

<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>

它失败了，这是来自控制台的堆栈跟踪:

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"
  }

这是我的组件的代码:

  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);
  }

我也尝试了 ckeditor builder 以添加 divarea 插件，但没有运气。

不幸的是，我无法为此创建一个 plunker，因为现在不支持 angular-cli。

你知道为什么吗？
先感谢您。

Answer 1

我通过使用这个技巧(脏修复但工作)解决了这个问题。

首先，在您的 HTML 模板中装饰 ckeditor，使其仅在方法 isVisible() 返回 true 时可见:

<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(inject) ElementRef(将其添加到组件构造函数中):

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;
}

这样做，CKEditor 将仅在组件可见时被实例化(假设当组件可见时，它已完成加载)。

请注意，使用 ElementRef 会使您的应用程序更容易受到攻击(请参阅: https://angular.io/api/core/ElementRef )