Angular 2:动态模板内部点击的功能/方法(动态组件)

时间:2016-12-14 16:58:19

标签: angular typescript compilation angular2-compiler

按照以下示例:

How can I use/create dynamic template to compile dynamic Component with Angular 2.0?

我开发了自己的模板生成器,它直接从变量中获取HTML内容。 这里是: http://plnkr.co/edit/2Sv1vp?p=preview

现在,我的问题是......如果模板内容必须与组件交互,例如在点击时执行的功能......我该怎么做?

这是我的app.component.ts

import { Component }          from '@angular/core';

@Component({
  selector: 'my-app',  
  template: `
    <div>
      <h2>An app with DYNAMIC content</h2>
      <hr />
      <dynamic-detail [tmpl]="tmpl1" [entity]="entity"></dynamic-detail>
      <dynamic-detail [tmpl]="tmpl2" [entity]="entity"></dynamic-detail>
    </div>`,
   })
   export class AppComponent { 
     private tmpl: string;
     private entity: any;

     constructor() {
       this.entity = { 
         code: "ABC123",
         description: "A description of this Entity",
         nome: "Bea"
       };

       this.tmpl1 = '<h2>Sono {{entity.nome}}, il primo template</h2>';
       this.tmpl2 = '<a (click)="printSomething()">Sono il secondo template</a>';
      }

    printSomething() {
      console.log("Hello World");
    }
}

当我尝试点击&#34; Sono il secondo template&#34;时,它应该执行printSomething()函数,但我得到了这个错误:

 Error in ./CustomDynamicComponent class CustomDynamicComponent - inline template:0:0 caused by: self.context.printSomething is not a function

1 个答案:

答案 0 :(得分:0)

问题正如Angular所说; printSomething在动态创建的组件中不存在。如果我们在动态创建的组件中声明一个函数,我们就可以调用它:

<强> app.component.ts

this.tmpl2 = '<a (click)="linkClicked()">Sono il secondo template</a>';

<强> type.builder.ts

  protected createNewComponent(tmpl: string) {
    @Component({
      selector: 'dynamic-component',
      template: tmpl,
    })
    class CustomDynamicComponent implements IHaveDynamicData {
      @Input() public entity: any;

      linkClicked() {
        console.log('yay!');
      }

    };
    // a component for this particular template
    return CustomDynamicComponent;
  }

如果要在app.component.ts中调用方法,则需要在CustomDynamicComponent的新@Input()属性中传递对它的引用。