angular - Angular 2: Add components at specific/nth position dynamically

Question

Unable to add components at specific index. Below the plunker link for example. PlunkerAddRemoveComponents

Here, I am able to add components at a specific index at the first time only.

export class AddRemoveDynamic {
    idx: number = 0;

    constructor(private _dcl: DynamicComponentLoader, private _e: ElementRef) { }

    add() {
        this._dcl.loadIntoLocation(DynamicCmp, this._e, 'location').then((ref) => {
            ref.instance._ref = ref;
            ref.instance._idx = this.idx++;
        });
    }
}

My Scenario is:

• Click on Add Component button 3 times. It will create 3 rows continuously.
• Then click on second row Add button, it will create another row.
• And again click on the same button, it will create component next one row

Here, is the problem, I want to create component at every time next to Add button row.

Answer 1

DynamicComponentLoader已弃用。

我创建了一个示例，该示例ViewContainerRef.createComponent()允许在应添加元素的位置添加索引：

class DynamicCmp {
  _ref: ComponentRef;
  _idx: number;
  constructor(private resolver: ComponentResolver, private location:ViewContainerRef) { }
  remove() {
    this._ref.dispose();
  }
  add1() {
    this.resolver.resolveComponent(DynamicCmp).then((factory:ComponentFactory<any>) => {
      let ref = this.location.createComponent(factory, 0)
      ref.instance._ref = ref;
      ref.instance._idx = this._idx++;
    });
  }
}

Plunker 示例