在Angular2中使用ComponentResolver和ngFor创建动态的anchorName/Components [英] create dynamic anchorName/Components with ComponentResolver and ngFor in Angular2

问题描述

我需要在ngFor循环中创建唯一的锚名称/组件，以将其与ComponentResolver.resolveComponent一起使用.

I need to create unique Anchor Names/Components in a ngFor loop to use it with ComponentResolver.resolveComponent.

<div>
  <table>
    <tr *ng-for="#vIndex of vArr">
      <td *ng-for="#hIndex of hArr">
        <div #uniqueanchorname{{vIndex}}_{{hIndex}}></div>
      </td>
    </tr>
  </table>
</div>

生成的html应该看起来像这样:

the resulting html should look something like that:

<div>
  <table>
    <tr>
      <td>
        <div #uniqueanchorname0_0></div>
      </td>
      <td>
        <div #uniqueanchorname0_1></div>
      </td>
    </tr>
    <tr>
      <td>
        <div #uniqueanchorname1_0></div>
      </td>
      <td>
        <div #uniqueanchorname1_1></div>
      </td>
      <td>
        <div #uniqueanchorname1_2></div>
      </td>
    </tr>
  </table>
</div>

这样我就可以使用DynamicComponentLoader了:

With that i can use the DynamicComponentLoader like:

loader.loadIntoLocation(responseDependentComponent, elementRef, 'uniqueAnchorName1_2');

生成的HTML不会被替换，其外观类似于:

the resulting HTML does not get replaced and will look something like:

<div>
  <table>
    <tr>
      <td>
        <div #uniqueanchorname{{vIndex}}_{{hIndex}}></div>
      </td>
      <td>
        <div #uniqueanchorname{{vIndex}}_{{hIndex}}></div>
      </td>
    </tr>
    <tr>
      <td>
        <div #uniqueanchorname{{vIndex}}_{{hIndex}}></div>
      </td>
      <td>
        <div #uniqueanchorname{{vIndex}}_{{hIndex}}></div>
      </td>
      <td>
        <div #uniqueanchorname{{vIndex}}_{{hIndex}}></div>
      </td>
    </tr>
  </table>
</div>

如果无法创建唯一的锚名称.还有其他将组件加载到特定位置的方法吗?

If the creation of unique anchor names is not possible. Is there an other way to load components into a specific location?

推荐答案

对不起，发生了误会.

import {
  Directive, 
  Component, 
  View, 
  CORE_DIRECTIVES, 
  ElementRef, 
  DynamicComponentLoader,
  Input,
  QueryList,
  ViewChildren
} from 'angular2/angular2'

@Component({
  selector: 'my-cmp'
})
@View({
  template: 'my component'
})
class MyCmp {}

@Directive({
  selector: '[location]'
})
class Location {
  @Input() h: number;
  @Input() v: number;
  constructor(public elementRef: ElementRef) {
  }
}

@Component({
  selector: 'my-table'
})
@View({
  template: `
  <table border>
    <tr *ng-for="#v of vArr">
      <td *ng-for="#h of hArr">
        <div location v="{{v}}" h="{{h}}">{{v}}-{{h}}</div>
      </td>
    </tr>
  </table>
  h:<input #hi value="1"><br>
  v:<input #vi value="2"><br>
  <button (click)="load(hi.value, vi.value)">load</button>
  `,
  directives: [CORE_DIRECTIVES, Location]
})
class MyTable {
  vArr = [1, 2, 3];
  hArr = [1, 2, 3];
  @ViewChildren(Location) locations: QueryList;
  constructor(
    private loader: DynamicComponentLoader,
    ) {
  }

  load(h, v) {
    let elementRef = null;
    for(let i = 0; i < this.locations._results.length; i++) {
       if(this.locations._results[i].h == h && this.locations._results[i].v ==v) {
         elementRef = this.locations._results[i].elementRef;
       }
    }

    if(elementRef) {
      this.loader.loadNextToLocation(MyCmp, elementRef);
    }
  }
}

@Component({
  selector: 'my-app'
})
@View({
  template: `<my-table></my-table>`,
  directives: [MyTable]
})
export class App {}

http://plnkr.co/edit/dqfPCW3MBa9hM23EW3cS?p=preview 那是您需要的吗?

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