如何将动态组件放入容器中

Question

我想创建动态组件并将这些组件的视图插入到容器中.

我认为这可以通过ViewContainerRef来实现.

但我不知道,我们能得到ViewContainerRef任何组件吗？如果是的话怎么样？我是Angular的新手,如果有任何其他好的解决方案可以处理这种情况,请建议我.

更新 我认为,我非常接近解决方案.下面是代码.

app.component.ts

import {Component} from '@angular/core';
import {ContainerComponet} from './container.component'

@Component({
    selector: 'my-app',
    template: `
    <container> </container>
    `,
    directives: [ContainerComponet]
})
export class AppComponent {

    constructor() { }

 }

container.component.ts

import {Component, ComponentResolver, ViewContainerRef} from '@angular/core'
import {controlBoxComponent as controlBox} from './controlBox.component';

@Component({
    selector: 'container',
    template: 'container'    
})
export class ContainerComponet {
    constructor(viewContainer: ViewContainerRef, private _cr: ComponentResolver) {

        this._cr.resolveComponent(controlBox)
            .then(cmpFactory => {
                const ctxInjector = viewContainer.injector;
                return viewContainer.createComponent(cmpFactory, 0,  ctxInjector);
            })

    }
}

controlBox.component.ts

import {Component} from '@angular/core'
@Component({
    selector: 'controlBox',
    template: 'controlBox'
})
export class controlBoxComponent {
    constructor() { }
}

产量

<my-app>
    <container>container</container><controlbox _ngcontent-lsn-3="">controlBox</controlbox>
</my-app>

预期结果

<my-app>
    <container>container
    <controlbox _ngcontent-lsn-3="">controlBox</controlbox>
    </container>
</my-app>

Answer 1

您可以通过ViewContainerRef当前组件视图中的元素获取当前组件

@Component({
  selector: '...',
  directives: [OtherComponent, FooComponent],
  template: `
    <other-component></other-component>
    <foo-component #foo></foo-component>
    <div #div></div>`
})

export class SomeComponent {
  // `ViewContainerRef` from an element in the view
  @ViewChild(OtherComponent, {read: ViewContainerRef}) other;
  @ViewChild('foo', {read: ViewContainerRef}) foo;
  @ViewChild('div', {read: ViewContainerRef}) div;

  // `ViewContainerRef` from the component itself
  constructor(private viewContainerRef:ViewContainerRef, private componentFactoryResolver: ComponentFactoryResolver) {}

  let factory = this.componentFactoryResolver.resolveComponentFactory(ControlBox)
  this.componentRef = this.other.createComponent(factory);
  // this.componentRef = this.foo.createComponent(factory);
  // this.componentRef = this.div.createComponent(factory);
  // this.componentRef = this.viewContainerRef.createComponent(factory);
  });
}

另请参阅Angular 2动态选项卡,其中包含用户单击所选组件